File: | clang/lib/CodeGen/CodeGenModule.cpp |
Warning: | line 376, 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 "CGOpenMPRuntimeAMDGCN.h" | |||
23 | #include "CGOpenMPRuntimeNVPTX.h" | |||
24 | #include "CodeGenFunction.h" | |||
25 | #include "CodeGenPGO.h" | |||
26 | #include "ConstantEmitter.h" | |||
27 | #include "CoverageMappingGen.h" | |||
28 | #include "TargetInfo.h" | |||
29 | #include "clang/AST/ASTContext.h" | |||
30 | #include "clang/AST/CharUnits.h" | |||
31 | #include "clang/AST/DeclCXX.h" | |||
32 | #include "clang/AST/DeclObjC.h" | |||
33 | #include "clang/AST/DeclTemplate.h" | |||
34 | #include "clang/AST/Mangle.h" | |||
35 | #include "clang/AST/RecordLayout.h" | |||
36 | #include "clang/AST/RecursiveASTVisitor.h" | |||
37 | #include "clang/AST/StmtVisitor.h" | |||
38 | #include "clang/Basic/Builtins.h" | |||
39 | #include "clang/Basic/CharInfo.h" | |||
40 | #include "clang/Basic/CodeGenOptions.h" | |||
41 | #include "clang/Basic/Diagnostic.h" | |||
42 | #include "clang/Basic/FileManager.h" | |||
43 | #include "clang/Basic/Module.h" | |||
44 | #include "clang/Basic/SourceManager.h" | |||
45 | #include "clang/Basic/TargetInfo.h" | |||
46 | #include "clang/Basic/Version.h" | |||
47 | #include "clang/CodeGen/ConstantInitBuilder.h" | |||
48 | #include "clang/Frontend/FrontendDiagnostic.h" | |||
49 | #include "llvm/ADT/StringSwitch.h" | |||
50 | #include "llvm/ADT/Triple.h" | |||
51 | #include "llvm/Analysis/TargetLibraryInfo.h" | |||
52 | #include "llvm/Frontend/OpenMP/OMPIRBuilder.h" | |||
53 | #include "llvm/IR/CallingConv.h" | |||
54 | #include "llvm/IR/DataLayout.h" | |||
55 | #include "llvm/IR/Intrinsics.h" | |||
56 | #include "llvm/IR/LLVMContext.h" | |||
57 | #include "llvm/IR/Module.h" | |||
58 | #include "llvm/IR/ProfileSummary.h" | |||
59 | #include "llvm/ProfileData/InstrProfReader.h" | |||
60 | #include "llvm/Support/CodeGen.h" | |||
61 | #include "llvm/Support/CommandLine.h" | |||
62 | #include "llvm/Support/ConvertUTF.h" | |||
63 | #include "llvm/Support/ErrorHandling.h" | |||
64 | #include "llvm/Support/MD5.h" | |||
65 | #include "llvm/Support/TimeProfiler.h" | |||
66 | ||||
67 | using namespace clang; | |||
68 | using namespace CodeGen; | |||
69 | ||||
70 | static llvm::cl::opt<bool> LimitedCoverage( | |||
71 | "limited-coverage-experimental", llvm::cl::ZeroOrMore, llvm::cl::Hidden, | |||
72 | llvm::cl::desc("Emit limited coverage mapping information (experimental)"), | |||
73 | llvm::cl::init(false)); | |||
74 | ||||
75 | static const char AnnotationSection[] = "llvm.metadata"; | |||
76 | ||||
77 | static CGCXXABI *createCXXABI(CodeGenModule &CGM) { | |||
78 | switch (CGM.getTarget().getCXXABI().getKind()) { | |||
79 | case TargetCXXABI::Fuchsia: | |||
80 | case TargetCXXABI::GenericAArch64: | |||
81 | case TargetCXXABI::GenericARM: | |||
82 | case TargetCXXABI::iOS: | |||
83 | case TargetCXXABI::iOS64: | |||
84 | case TargetCXXABI::WatchOS: | |||
85 | case TargetCXXABI::GenericMIPS: | |||
86 | case TargetCXXABI::GenericItanium: | |||
87 | case TargetCXXABI::WebAssembly: | |||
88 | case TargetCXXABI::XL: | |||
89 | return CreateItaniumCXXABI(CGM); | |||
90 | case TargetCXXABI::Microsoft: | |||
91 | return CreateMicrosoftCXXABI(CGM); | |||
92 | } | |||
93 | ||||
94 | llvm_unreachable("invalid C++ ABI kind")::llvm::llvm_unreachable_internal("invalid C++ ABI kind", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 94); | |||
95 | } | |||
96 | ||||
97 | CodeGenModule::CodeGenModule(ASTContext &C, const HeaderSearchOptions &HSO, | |||
98 | const PreprocessorOptions &PPO, | |||
99 | const CodeGenOptions &CGO, llvm::Module &M, | |||
100 | DiagnosticsEngine &diags, | |||
101 | CoverageSourceInfo *CoverageInfo) | |||
102 | : Context(C), LangOpts(C.getLangOpts()), HeaderSearchOpts(HSO), | |||
103 | PreprocessorOpts(PPO), CodeGenOpts(CGO), TheModule(M), Diags(diags), | |||
104 | Target(C.getTargetInfo()), ABI(createCXXABI(*this)), | |||
105 | VMContext(M.getContext()), Types(*this), VTables(*this), | |||
106 | SanitizerMD(new SanitizerMetadata(*this)) { | |||
107 | ||||
108 | // Initialize the type cache. | |||
109 | llvm::LLVMContext &LLVMContext = M.getContext(); | |||
110 | VoidTy = llvm::Type::getVoidTy(LLVMContext); | |||
111 | Int8Ty = llvm::Type::getInt8Ty(LLVMContext); | |||
112 | Int16Ty = llvm::Type::getInt16Ty(LLVMContext); | |||
113 | Int32Ty = llvm::Type::getInt32Ty(LLVMContext); | |||
114 | Int64Ty = llvm::Type::getInt64Ty(LLVMContext); | |||
115 | HalfTy = llvm::Type::getHalfTy(LLVMContext); | |||
116 | BFloatTy = llvm::Type::getBFloatTy(LLVMContext); | |||
117 | FloatTy = llvm::Type::getFloatTy(LLVMContext); | |||
118 | DoubleTy = llvm::Type::getDoubleTy(LLVMContext); | |||
119 | PointerWidthInBits = C.getTargetInfo().getPointerWidth(0); | |||
120 | PointerAlignInBytes = | |||
121 | C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(0)).getQuantity(); | |||
122 | SizeSizeInBytes = | |||
123 | C.toCharUnitsFromBits(C.getTargetInfo().getMaxPointerWidth()).getQuantity(); | |||
124 | IntAlignInBytes = | |||
125 | C.toCharUnitsFromBits(C.getTargetInfo().getIntAlign()).getQuantity(); | |||
126 | IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); | |||
127 | IntPtrTy = llvm::IntegerType::get(LLVMContext, | |||
128 | C.getTargetInfo().getMaxPointerWidth()); | |||
129 | Int8PtrTy = Int8Ty->getPointerTo(0); | |||
130 | Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); | |||
131 | AllocaInt8PtrTy = Int8Ty->getPointerTo( | |||
132 | M.getDataLayout().getAllocaAddrSpace()); | |||
133 | ASTAllocaAddressSpace = getTargetCodeGenInfo().getASTAllocaAddressSpace(); | |||
134 | ||||
135 | RuntimeCC = getTargetCodeGenInfo().getABIInfo().getRuntimeCC(); | |||
136 | ||||
137 | if (LangOpts.ObjC) | |||
138 | createObjCRuntime(); | |||
139 | if (LangOpts.OpenCL) | |||
140 | createOpenCLRuntime(); | |||
141 | if (LangOpts.OpenMP) | |||
142 | createOpenMPRuntime(); | |||
143 | if (LangOpts.CUDA) | |||
144 | createCUDARuntime(); | |||
145 | ||||
146 | // Enable TBAA unless it's suppressed. ThreadSanitizer needs TBAA even at O0. | |||
147 | if (LangOpts.Sanitize.has(SanitizerKind::Thread) || | |||
148 | (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0)) | |||
149 | TBAA.reset(new CodeGenTBAA(Context, TheModule, CodeGenOpts, getLangOpts(), | |||
150 | getCXXABI().getMangleContext())); | |||
151 | ||||
152 | // If debug info or coverage generation is enabled, create the CGDebugInfo | |||
153 | // object. | |||
154 | if (CodeGenOpts.getDebugInfo() != codegenoptions::NoDebugInfo || | |||
155 | CodeGenOpts.EmitGcovArcs || CodeGenOpts.EmitGcovNotes) | |||
156 | DebugInfo.reset(new CGDebugInfo(*this)); | |||
157 | ||||
158 | Block.GlobalUniqueCount = 0; | |||
159 | ||||
160 | if (C.getLangOpts().ObjC) | |||
161 | ObjCData.reset(new ObjCEntrypoints()); | |||
162 | ||||
163 | if (CodeGenOpts.hasProfileClangUse()) { | |||
164 | auto ReaderOrErr = llvm::IndexedInstrProfReader::create( | |||
165 | CodeGenOpts.ProfileInstrumentUsePath, CodeGenOpts.ProfileRemappingFile); | |||
166 | if (auto E = ReaderOrErr.takeError()) { | |||
167 | unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error, | |||
168 | "Could not read profile %0: %1"); | |||
169 | llvm::handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EI) { | |||
170 | getDiags().Report(DiagID) << CodeGenOpts.ProfileInstrumentUsePath | |||
171 | << EI.message(); | |||
172 | }); | |||
173 | } else | |||
174 | PGOReader = std::move(ReaderOrErr.get()); | |||
175 | } | |||
176 | ||||
177 | // If coverage mapping generation is enabled, create the | |||
178 | // CoverageMappingModuleGen object. | |||
179 | if (CodeGenOpts.CoverageMapping) | |||
180 | CoverageMapping.reset(new CoverageMappingModuleGen(*this, *CoverageInfo)); | |||
181 | } | |||
182 | ||||
183 | CodeGenModule::~CodeGenModule() {} | |||
184 | ||||
185 | void CodeGenModule::createObjCRuntime() { | |||
186 | // This is just isGNUFamily(), but we want to force implementors of | |||
187 | // new ABIs to decide how best to do this. | |||
188 | switch (LangOpts.ObjCRuntime.getKind()) { | |||
189 | case ObjCRuntime::GNUstep: | |||
190 | case ObjCRuntime::GCC: | |||
191 | case ObjCRuntime::ObjFW: | |||
192 | ObjCRuntime.reset(CreateGNUObjCRuntime(*this)); | |||
193 | return; | |||
194 | ||||
195 | case ObjCRuntime::FragileMacOSX: | |||
196 | case ObjCRuntime::MacOSX: | |||
197 | case ObjCRuntime::iOS: | |||
198 | case ObjCRuntime::WatchOS: | |||
199 | ObjCRuntime.reset(CreateMacObjCRuntime(*this)); | |||
200 | return; | |||
201 | } | |||
202 | llvm_unreachable("bad runtime kind")::llvm::llvm_unreachable_internal("bad runtime kind", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 202); | |||
203 | } | |||
204 | ||||
205 | void CodeGenModule::createOpenCLRuntime() { | |||
206 | OpenCLRuntime.reset(new CGOpenCLRuntime(*this)); | |||
207 | } | |||
208 | ||||
209 | void CodeGenModule::createOpenMPRuntime() { | |||
210 | // Select a specialized code generation class based on the target, if any. | |||
211 | // If it does not exist use the default implementation. | |||
212 | switch (getTriple().getArch()) { | |||
213 | case llvm::Triple::nvptx: | |||
214 | case llvm::Triple::nvptx64: | |||
215 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 216, __PRETTY_FUNCTION__)) | |||
216 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 216, __PRETTY_FUNCTION__)); | |||
217 | OpenMPRuntime.reset(new CGOpenMPRuntimeNVPTX(*this)); | |||
218 | break; | |||
219 | case llvm::Triple::amdgcn: | |||
220 | assert(getLangOpts().OpenMPIsDevice &&((getLangOpts().OpenMPIsDevice && "OpenMP AMDGCN is only prepared to deal with device code." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().OpenMPIsDevice && \"OpenMP AMDGCN is only prepared to deal with device code.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 221, __PRETTY_FUNCTION__)) | |||
221 | "OpenMP AMDGCN is only prepared to deal with device code.")((getLangOpts().OpenMPIsDevice && "OpenMP AMDGCN is only prepared to deal with device code." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().OpenMPIsDevice && \"OpenMP AMDGCN is only prepared to deal with device code.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 221, __PRETTY_FUNCTION__)); | |||
222 | OpenMPRuntime.reset(new CGOpenMPRuntimeAMDGCN(*this)); | |||
223 | break; | |||
224 | default: | |||
225 | if (LangOpts.OpenMPSimd) | |||
226 | OpenMPRuntime.reset(new CGOpenMPSIMDRuntime(*this)); | |||
227 | else | |||
228 | OpenMPRuntime.reset(new CGOpenMPRuntime(*this)); | |||
229 | break; | |||
230 | } | |||
231 | } | |||
232 | ||||
233 | void CodeGenModule::createCUDARuntime() { | |||
234 | CUDARuntime.reset(CreateNVCUDARuntime(*this)); | |||
235 | } | |||
236 | ||||
237 | void CodeGenModule::addReplacement(StringRef Name, llvm::Constant *C) { | |||
238 | Replacements[Name] = C; | |||
239 | } | |||
240 | ||||
241 | void CodeGenModule::applyReplacements() { | |||
242 | for (auto &I : Replacements) { | |||
243 | StringRef MangledName = I.first(); | |||
244 | llvm::Constant *Replacement = I.second; | |||
245 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
246 | if (!Entry) | |||
247 | continue; | |||
248 | auto *OldF = cast<llvm::Function>(Entry); | |||
249 | auto *NewF = dyn_cast<llvm::Function>(Replacement); | |||
250 | if (!NewF) { | |||
251 | if (auto *Alias = dyn_cast<llvm::GlobalAlias>(Replacement)) { | |||
252 | NewF = dyn_cast<llvm::Function>(Alias->getAliasee()); | |||
253 | } else { | |||
254 | auto *CE = cast<llvm::ConstantExpr>(Replacement); | |||
255 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 256, __PRETTY_FUNCTION__)) | |||
256 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 256, __PRETTY_FUNCTION__)); | |||
257 | NewF = dyn_cast<llvm::Function>(CE->getOperand(0)); | |||
258 | } | |||
259 | } | |||
260 | ||||
261 | // Replace old with new, but keep the old order. | |||
262 | OldF->replaceAllUsesWith(Replacement); | |||
263 | if (NewF) { | |||
264 | NewF->removeFromParent(); | |||
265 | OldF->getParent()->getFunctionList().insertAfter(OldF->getIterator(), | |||
266 | NewF); | |||
267 | } | |||
268 | OldF->eraseFromParent(); | |||
269 | } | |||
270 | } | |||
271 | ||||
272 | void CodeGenModule::addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C) { | |||
273 | GlobalValReplacements.push_back(std::make_pair(GV, C)); | |||
274 | } | |||
275 | ||||
276 | void CodeGenModule::applyGlobalValReplacements() { | |||
277 | for (auto &I : GlobalValReplacements) { | |||
278 | llvm::GlobalValue *GV = I.first; | |||
279 | llvm::Constant *C = I.second; | |||
280 | ||||
281 | GV->replaceAllUsesWith(C); | |||
282 | GV->eraseFromParent(); | |||
283 | } | |||
284 | } | |||
285 | ||||
286 | // This is only used in aliases that we created and we know they have a | |||
287 | // linear structure. | |||
288 | static const llvm::GlobalObject *getAliasedGlobal( | |||
289 | const llvm::GlobalIndirectSymbol &GIS) { | |||
290 | llvm::SmallPtrSet<const llvm::GlobalIndirectSymbol*, 4> Visited; | |||
291 | const llvm::Constant *C = &GIS; | |||
292 | for (;;) { | |||
293 | C = C->stripPointerCasts(); | |||
294 | if (auto *GO
| |||
295 | return GO; | |||
296 | // stripPointerCasts will not walk over weak aliases. | |||
297 | auto *GIS2 = dyn_cast<llvm::GlobalIndirectSymbol>(C); | |||
298 | if (!GIS2
| |||
299 | return nullptr; | |||
300 | if (!Visited.insert(GIS2).second) | |||
301 | return nullptr; | |||
302 | C = GIS2->getIndirectSymbol(); | |||
303 | } | |||
304 | } | |||
305 | ||||
306 | void CodeGenModule::checkAliases() { | |||
307 | // Check if the constructed aliases are well formed. It is really unfortunate | |||
308 | // that we have to do this in CodeGen, but we only construct mangled names | |||
309 | // and aliases during codegen. | |||
310 | bool Error = false; | |||
311 | DiagnosticsEngine &Diags = getDiags(); | |||
312 | for (const GlobalDecl &GD : Aliases) { | |||
313 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
314 | SourceLocation Location; | |||
315 | bool IsIFunc = D->hasAttr<IFuncAttr>(); | |||
316 | if (const Attr *A = D->getDefiningAttr()) | |||
317 | Location = A->getLocation(); | |||
318 | else | |||
319 | llvm_unreachable("Not an alias or ifunc?")::llvm::llvm_unreachable_internal("Not an alias or ifunc?", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 319); | |||
320 | StringRef MangledName = getMangledName(GD); | |||
321 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
322 | auto *Alias = cast<llvm::GlobalIndirectSymbol>(Entry); | |||
323 | const llvm::GlobalValue *GV = getAliasedGlobal(*Alias); | |||
324 | if (!GV
| |||
325 | Error = true; | |||
326 | Diags.Report(Location, diag::err_cyclic_alias) << IsIFunc; | |||
327 | } else if (GV->isDeclaration()) { | |||
328 | Error = true; | |||
329 | Diags.Report(Location, diag::err_alias_to_undefined) | |||
330 | << IsIFunc << IsIFunc; | |||
331 | } else if (IsIFunc) { | |||
332 | // Check resolver function type. | |||
333 | llvm::FunctionType *FTy = dyn_cast<llvm::FunctionType>( | |||
334 | GV->getType()->getPointerElementType()); | |||
335 | assert(FTy)((FTy) ? static_cast<void> (0) : __assert_fail ("FTy", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 335, __PRETTY_FUNCTION__)); | |||
336 | if (!FTy->getReturnType()->isPointerTy()) | |||
337 | Diags.Report(Location, diag::err_ifunc_resolver_return); | |||
338 | } | |||
339 | ||||
340 | llvm::Constant *Aliasee = Alias->getIndirectSymbol(); | |||
341 | llvm::GlobalValue *AliaseeGV; | |||
342 | if (auto CE = dyn_cast<llvm::ConstantExpr>(Aliasee)) | |||
343 | AliaseeGV = cast<llvm::GlobalValue>(CE->getOperand(0)); | |||
344 | else | |||
345 | AliaseeGV = cast<llvm::GlobalValue>(Aliasee); | |||
346 | ||||
347 | if (const SectionAttr *SA
| |||
348 | StringRef AliasSection = SA->getName(); | |||
349 | if (AliasSection != AliaseeGV->getSection()) | |||
350 | Diags.Report(SA->getLocation(), diag::warn_alias_with_section) | |||
351 | << AliasSection << IsIFunc << IsIFunc; | |||
352 | } | |||
353 | ||||
354 | // We have to handle alias to weak aliases in here. LLVM itself disallows | |||
355 | // this since the object semantics would not match the IL one. For | |||
356 | // compatibility with gcc we implement it by just pointing the alias | |||
357 | // to its aliasee's aliasee. We also warn, since the user is probably | |||
358 | // expecting the link to be weak. | |||
359 | if (auto GA
| |||
360 | if (GA->isInterposable()) { | |||
361 | Diags.Report(Location, diag::warn_alias_to_weak_alias) | |||
362 | << GV->getName() << GA->getName() << IsIFunc; | |||
363 | Aliasee = llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
364 | GA->getIndirectSymbol(), Alias->getType()); | |||
365 | Alias->setIndirectSymbol(Aliasee); | |||
366 | } | |||
367 | } | |||
368 | } | |||
369 | if (!Error
| |||
370 | return; | |||
371 | ||||
372 | for (const GlobalDecl &GD : Aliases) { | |||
373 | StringRef MangledName = getMangledName(GD); | |||
374 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
375 | auto *Alias = dyn_cast<llvm::GlobalIndirectSymbol>(Entry); | |||
376 | Alias->replaceAllUsesWith(llvm::UndefValue::get(Alias->getType())); | |||
| ||||
377 | Alias->eraseFromParent(); | |||
378 | } | |||
379 | } | |||
380 | ||||
381 | void CodeGenModule::clear() { | |||
382 | DeferredDeclsToEmit.clear(); | |||
383 | if (OpenMPRuntime) | |||
384 | OpenMPRuntime->clear(); | |||
385 | } | |||
386 | ||||
387 | void InstrProfStats::reportDiagnostics(DiagnosticsEngine &Diags, | |||
388 | StringRef MainFile) { | |||
389 | if (!hasDiagnostics()) | |||
390 | return; | |||
391 | if (VisitedInMainFile > 0 && VisitedInMainFile == MissingInMainFile) { | |||
392 | if (MainFile.empty()) | |||
393 | MainFile = "<stdin>"; | |||
394 | Diags.Report(diag::warn_profile_data_unprofiled) << MainFile; | |||
395 | } else { | |||
396 | if (Mismatched > 0) | |||
397 | Diags.Report(diag::warn_profile_data_out_of_date) << Visited << Mismatched; | |||
398 | ||||
399 | if (Missing > 0) | |||
400 | Diags.Report(diag::warn_profile_data_missing) << Visited << Missing; | |||
401 | } | |||
402 | } | |||
403 | ||||
404 | void CodeGenModule::Release() { | |||
405 | EmitDeferred(); | |||
406 | EmitVTablesOpportunistically(); | |||
407 | applyGlobalValReplacements(); | |||
408 | applyReplacements(); | |||
409 | checkAliases(); | |||
| ||||
410 | emitMultiVersionFunctions(); | |||
411 | EmitCXXGlobalInitFunc(); | |||
412 | EmitCXXGlobalCleanUpFunc(); | |||
413 | registerGlobalDtorsWithAtExit(); | |||
414 | EmitCXXThreadLocalInitFunc(); | |||
415 | if (ObjCRuntime) | |||
416 | if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) | |||
417 | AddGlobalCtor(ObjCInitFunction); | |||
418 | if (Context.getLangOpts().CUDA && !Context.getLangOpts().CUDAIsDevice && | |||
419 | CUDARuntime) { | |||
420 | if (llvm::Function *CudaCtorFunction = | |||
421 | CUDARuntime->makeModuleCtorFunction()) | |||
422 | AddGlobalCtor(CudaCtorFunction); | |||
423 | } | |||
424 | if (OpenMPRuntime) { | |||
425 | if (llvm::Function *OpenMPRequiresDirectiveRegFun = | |||
426 | OpenMPRuntime->emitRequiresDirectiveRegFun()) { | |||
427 | AddGlobalCtor(OpenMPRequiresDirectiveRegFun, 0); | |||
428 | } | |||
429 | OpenMPRuntime->createOffloadEntriesAndInfoMetadata(); | |||
430 | OpenMPRuntime->clear(); | |||
431 | } | |||
432 | if (PGOReader) { | |||
433 | getModule().setProfileSummary( | |||
434 | PGOReader->getSummary(/* UseCS */ false).getMD(VMContext), | |||
435 | llvm::ProfileSummary::PSK_Instr); | |||
436 | if (PGOStats.hasDiagnostics()) | |||
437 | PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName); | |||
438 | } | |||
439 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); | |||
440 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); | |||
441 | EmitGlobalAnnotations(); | |||
442 | EmitStaticExternCAliases(); | |||
443 | EmitDeferredUnusedCoverageMappings(); | |||
444 | if (CoverageMapping) | |||
445 | CoverageMapping->emit(); | |||
446 | if (CodeGenOpts.SanitizeCfiCrossDso) { | |||
447 | CodeGenFunction(*this).EmitCfiCheckFail(); | |||
448 | CodeGenFunction(*this).EmitCfiCheckStub(); | |||
449 | } | |||
450 | emitAtAvailableLinkGuard(); | |||
451 | if (Context.getTargetInfo().getTriple().isWasm() && | |||
452 | !Context.getTargetInfo().getTriple().isOSEmscripten()) { | |||
453 | EmitMainVoidAlias(); | |||
454 | } | |||
455 | emitLLVMUsed(); | |||
456 | if (SanStats) | |||
457 | SanStats->finish(); | |||
458 | ||||
459 | if (CodeGenOpts.Autolink && | |||
460 | (Context.getLangOpts().Modules || !LinkerOptionsMetadata.empty())) { | |||
461 | EmitModuleLinkOptions(); | |||
462 | } | |||
463 | ||||
464 | // On ELF we pass the dependent library specifiers directly to the linker | |||
465 | // without manipulating them. This is in contrast to other platforms where | |||
466 | // they are mapped to a specific linker option by the compiler. This | |||
467 | // difference is a result of the greater variety of ELF linkers and the fact | |||
468 | // that ELF linkers tend to handle libraries in a more complicated fashion | |||
469 | // than on other platforms. This forces us to defer handling the dependent | |||
470 | // libs to the linker. | |||
471 | // | |||
472 | // CUDA/HIP device and host libraries are different. Currently there is no | |||
473 | // way to differentiate dependent libraries for host or device. Existing | |||
474 | // usage of #pragma comment(lib, *) is intended for host libraries on | |||
475 | // Windows. Therefore emit llvm.dependent-libraries only for host. | |||
476 | if (!ELFDependentLibraries.empty() && !Context.getLangOpts().CUDAIsDevice) { | |||
477 | auto *NMD = getModule().getOrInsertNamedMetadata("llvm.dependent-libraries"); | |||
478 | for (auto *MD : ELFDependentLibraries) | |||
479 | NMD->addOperand(MD); | |||
480 | } | |||
481 | ||||
482 | // Record mregparm value now so it is visible through rest of codegen. | |||
483 | if (Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86) | |||
484 | getModule().addModuleFlag(llvm::Module::Error, "NumRegisterParameters", | |||
485 | CodeGenOpts.NumRegisterParameters); | |||
486 | ||||
487 | if (CodeGenOpts.DwarfVersion) { | |||
488 | getModule().addModuleFlag(llvm::Module::Max, "Dwarf Version", | |||
489 | CodeGenOpts.DwarfVersion); | |||
490 | } | |||
491 | ||||
492 | if (Context.getLangOpts().SemanticInterposition) | |||
493 | // Require various optimization to respect semantic interposition. | |||
494 | getModule().setSemanticInterposition(1); | |||
495 | else if (Context.getLangOpts().ExplicitNoSemanticInterposition) | |||
496 | // Allow dso_local on applicable targets. | |||
497 | getModule().setSemanticInterposition(0); | |||
498 | ||||
499 | if (CodeGenOpts.EmitCodeView) { | |||
500 | // Indicate that we want CodeView in the metadata. | |||
501 | getModule().addModuleFlag(llvm::Module::Warning, "CodeView", 1); | |||
502 | } | |||
503 | if (CodeGenOpts.CodeViewGHash) { | |||
504 | getModule().addModuleFlag(llvm::Module::Warning, "CodeViewGHash", 1); | |||
505 | } | |||
506 | if (CodeGenOpts.ControlFlowGuard) { | |||
507 | // Function ID tables and checks for Control Flow Guard (cfguard=2). | |||
508 | getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 2); | |||
509 | } else if (CodeGenOpts.ControlFlowGuardNoChecks) { | |||
510 | // Function ID tables for Control Flow Guard (cfguard=1). | |||
511 | getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 1); | |||
512 | } | |||
513 | if (CodeGenOpts.OptimizationLevel > 0 && CodeGenOpts.StrictVTablePointers) { | |||
514 | // We don't support LTO with 2 with different StrictVTablePointers | |||
515 | // FIXME: we could support it by stripping all the information introduced | |||
516 | // by StrictVTablePointers. | |||
517 | ||||
518 | getModule().addModuleFlag(llvm::Module::Error, "StrictVTablePointers",1); | |||
519 | ||||
520 | llvm::Metadata *Ops[2] = { | |||
521 | llvm::MDString::get(VMContext, "StrictVTablePointers"), | |||
522 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
523 | llvm::Type::getInt32Ty(VMContext), 1))}; | |||
524 | ||||
525 | getModule().addModuleFlag(llvm::Module::Require, | |||
526 | "StrictVTablePointersRequirement", | |||
527 | llvm::MDNode::get(VMContext, Ops)); | |||
528 | } | |||
529 | if (getModuleDebugInfo()) | |||
530 | // We support a single version in the linked module. The LLVM | |||
531 | // parser will drop debug info with a different version number | |||
532 | // (and warn about it, too). | |||
533 | getModule().addModuleFlag(llvm::Module::Warning, "Debug Info Version", | |||
534 | llvm::DEBUG_METADATA_VERSION); | |||
535 | ||||
536 | // We need to record the widths of enums and wchar_t, so that we can generate | |||
537 | // the correct build attributes in the ARM backend. wchar_size is also used by | |||
538 | // TargetLibraryInfo. | |||
539 | uint64_t WCharWidth = | |||
540 | Context.getTypeSizeInChars(Context.getWideCharType()).getQuantity(); | |||
541 | getModule().addModuleFlag(llvm::Module::Error, "wchar_size", WCharWidth); | |||
542 | ||||
543 | llvm::Triple::ArchType Arch = Context.getTargetInfo().getTriple().getArch(); | |||
544 | if ( Arch == llvm::Triple::arm | |||
545 | || Arch == llvm::Triple::armeb | |||
546 | || Arch == llvm::Triple::thumb | |||
547 | || Arch == llvm::Triple::thumbeb) { | |||
548 | // The minimum width of an enum in bytes | |||
549 | uint64_t EnumWidth = Context.getLangOpts().ShortEnums ? 1 : 4; | |||
550 | getModule().addModuleFlag(llvm::Module::Error, "min_enum_size", EnumWidth); | |||
551 | } | |||
552 | ||||
553 | if (Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64) { | |||
554 | StringRef ABIStr = Target.getABI(); | |||
555 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
556 | getModule().addModuleFlag(llvm::Module::Error, "target-abi", | |||
557 | llvm::MDString::get(Ctx, ABIStr)); | |||
558 | } | |||
559 | ||||
560 | if (CodeGenOpts.SanitizeCfiCrossDso) { | |||
561 | // Indicate that we want cross-DSO control flow integrity checks. | |||
562 | getModule().addModuleFlag(llvm::Module::Override, "Cross-DSO CFI", 1); | |||
563 | } | |||
564 | ||||
565 | if (CodeGenOpts.WholeProgramVTables) { | |||
566 | // Indicate whether VFE was enabled for this module, so that the | |||
567 | // vcall_visibility metadata added under whole program vtables is handled | |||
568 | // appropriately in the optimizer. | |||
569 | getModule().addModuleFlag(llvm::Module::Error, "Virtual Function Elim", | |||
570 | CodeGenOpts.VirtualFunctionElimination); | |||
571 | } | |||
572 | ||||
573 | if (LangOpts.Sanitize.has(SanitizerKind::CFIICall)) { | |||
574 | getModule().addModuleFlag(llvm::Module::Override, | |||
575 | "CFI Canonical Jump Tables", | |||
576 | CodeGenOpts.SanitizeCfiCanonicalJumpTables); | |||
577 | } | |||
578 | ||||
579 | if (CodeGenOpts.CFProtectionReturn && | |||
580 | Target.checkCFProtectionReturnSupported(getDiags())) { | |||
581 | // Indicate that we want to instrument return control flow protection. | |||
582 | getModule().addModuleFlag(llvm::Module::Override, "cf-protection-return", | |||
583 | 1); | |||
584 | } | |||
585 | ||||
586 | if (CodeGenOpts.CFProtectionBranch && | |||
587 | Target.checkCFProtectionBranchSupported(getDiags())) { | |||
588 | // Indicate that we want to instrument branch control flow protection. | |||
589 | getModule().addModuleFlag(llvm::Module::Override, "cf-protection-branch", | |||
590 | 1); | |||
591 | } | |||
592 | ||||
593 | if (Arch == llvm::Triple::aarch64 || Arch == llvm::Triple::aarch64_32 || | |||
594 | Arch == llvm::Triple::aarch64_be) { | |||
595 | getModule().addModuleFlag(llvm::Module::Error, | |||
596 | "branch-target-enforcement", | |||
597 | LangOpts.BranchTargetEnforcement); | |||
598 | ||||
599 | getModule().addModuleFlag(llvm::Module::Error, "sign-return-address", | |||
600 | LangOpts.hasSignReturnAddress()); | |||
601 | ||||
602 | getModule().addModuleFlag(llvm::Module::Error, "sign-return-address-all", | |||
603 | LangOpts.isSignReturnAddressScopeAll()); | |||
604 | ||||
605 | getModule().addModuleFlag(llvm::Module::Error, | |||
606 | "sign-return-address-with-bkey", | |||
607 | !LangOpts.isSignReturnAddressWithAKey()); | |||
608 | } | |||
609 | ||||
610 | if (!CodeGenOpts.MemoryProfileOutput.empty()) { | |||
611 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
612 | getModule().addModuleFlag( | |||
613 | llvm::Module::Error, "MemProfProfileFilename", | |||
614 | llvm::MDString::get(Ctx, CodeGenOpts.MemoryProfileOutput)); | |||
615 | } | |||
616 | ||||
617 | if (LangOpts.CUDAIsDevice && getTriple().isNVPTX()) { | |||
618 | // Indicate whether __nvvm_reflect should be configured to flush denormal | |||
619 | // floating point values to 0. (This corresponds to its "__CUDA_FTZ" | |||
620 | // property.) | |||
621 | getModule().addModuleFlag(llvm::Module::Override, "nvvm-reflect-ftz", | |||
622 | CodeGenOpts.FP32DenormalMode.Output != | |||
623 | llvm::DenormalMode::IEEE); | |||
624 | } | |||
625 | ||||
626 | // Emit OpenCL specific module metadata: OpenCL/SPIR version. | |||
627 | if (LangOpts.OpenCL) { | |||
628 | EmitOpenCLMetadata(); | |||
629 | // Emit SPIR version. | |||
630 | if (getTriple().isSPIR()) { | |||
631 | // SPIR v2.0 s2.12 - The SPIR version used by the module is stored in the | |||
632 | // opencl.spir.version named metadata. | |||
633 | // C++ is backwards compatible with OpenCL v2.0. | |||
634 | auto Version = LangOpts.OpenCLCPlusPlus ? 200 : LangOpts.OpenCLVersion; | |||
635 | llvm::Metadata *SPIRVerElts[] = { | |||
636 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
637 | Int32Ty, Version / 100)), | |||
638 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
639 | Int32Ty, (Version / 100 > 1) ? 0 : 2))}; | |||
640 | llvm::NamedMDNode *SPIRVerMD = | |||
641 | TheModule.getOrInsertNamedMetadata("opencl.spir.version"); | |||
642 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
643 | SPIRVerMD->addOperand(llvm::MDNode::get(Ctx, SPIRVerElts)); | |||
644 | } | |||
645 | } | |||
646 | ||||
647 | if (uint32_t PLevel = Context.getLangOpts().PICLevel) { | |||
648 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 648, __PRETTY_FUNCTION__)); | |||
649 | getModule().setPICLevel(static_cast<llvm::PICLevel::Level>(PLevel)); | |||
650 | if (Context.getLangOpts().PIE) | |||
651 | getModule().setPIELevel(static_cast<llvm::PIELevel::Level>(PLevel)); | |||
652 | } | |||
653 | ||||
654 | if (getCodeGenOpts().CodeModel.size() > 0) { | |||
655 | unsigned CM = llvm::StringSwitch<unsigned>(getCodeGenOpts().CodeModel) | |||
656 | .Case("tiny", llvm::CodeModel::Tiny) | |||
657 | .Case("small", llvm::CodeModel::Small) | |||
658 | .Case("kernel", llvm::CodeModel::Kernel) | |||
659 | .Case("medium", llvm::CodeModel::Medium) | |||
660 | .Case("large", llvm::CodeModel::Large) | |||
661 | .Default(~0u); | |||
662 | if (CM != ~0u) { | |||
663 | llvm::CodeModel::Model codeModel = static_cast<llvm::CodeModel::Model>(CM); | |||
664 | getModule().setCodeModel(codeModel); | |||
665 | } | |||
666 | } | |||
667 | ||||
668 | if (CodeGenOpts.NoPLT) | |||
669 | getModule().setRtLibUseGOT(); | |||
670 | ||||
671 | SimplifyPersonality(); | |||
672 | ||||
673 | if (getCodeGenOpts().EmitDeclMetadata) | |||
674 | EmitDeclMetadata(); | |||
675 | ||||
676 | if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) | |||
677 | EmitCoverageFile(); | |||
678 | ||||
679 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
680 | DI->finalize(); | |||
681 | ||||
682 | if (getCodeGenOpts().EmitVersionIdentMetadata) | |||
683 | EmitVersionIdentMetadata(); | |||
684 | ||||
685 | if (!getCodeGenOpts().RecordCommandLine.empty()) | |||
686 | EmitCommandLineMetadata(); | |||
687 | ||||
688 | getTargetCodeGenInfo().emitTargetMetadata(*this, MangledDeclNames); | |||
689 | ||||
690 | EmitBackendOptionsMetadata(getCodeGenOpts()); | |||
691 | } | |||
692 | ||||
693 | void CodeGenModule::EmitOpenCLMetadata() { | |||
694 | // SPIR v2.0 s2.13 - The OpenCL version used by the module is stored in the | |||
695 | // opencl.ocl.version named metadata node. | |||
696 | // C++ is backwards compatible with OpenCL v2.0. | |||
697 | // FIXME: We might need to add CXX version at some point too? | |||
698 | auto Version = LangOpts.OpenCLCPlusPlus ? 200 : LangOpts.OpenCLVersion; | |||
699 | llvm::Metadata *OCLVerElts[] = { | |||
700 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
701 | Int32Ty, Version / 100)), | |||
702 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
703 | Int32Ty, (Version % 100) / 10))}; | |||
704 | llvm::NamedMDNode *OCLVerMD = | |||
705 | TheModule.getOrInsertNamedMetadata("opencl.ocl.version"); | |||
706 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
707 | OCLVerMD->addOperand(llvm::MDNode::get(Ctx, OCLVerElts)); | |||
708 | } | |||
709 | ||||
710 | void CodeGenModule::EmitBackendOptionsMetadata( | |||
711 | const CodeGenOptions CodeGenOpts) { | |||
712 | switch (getTriple().getArch()) { | |||
713 | default: | |||
714 | break; | |||
715 | case llvm::Triple::riscv32: | |||
716 | case llvm::Triple::riscv64: | |||
717 | getModule().addModuleFlag(llvm::Module::Error, "SmallDataLimit", | |||
718 | CodeGenOpts.SmallDataLimit); | |||
719 | break; | |||
720 | } | |||
721 | } | |||
722 | ||||
723 | void CodeGenModule::UpdateCompletedType(const TagDecl *TD) { | |||
724 | // Make sure that this type is translated. | |||
725 | Types.UpdateCompletedType(TD); | |||
726 | } | |||
727 | ||||
728 | void CodeGenModule::RefreshTypeCacheForClass(const CXXRecordDecl *RD) { | |||
729 | // Make sure that this type is translated. | |||
730 | Types.RefreshTypeCacheForClass(RD); | |||
731 | } | |||
732 | ||||
733 | llvm::MDNode *CodeGenModule::getTBAATypeInfo(QualType QTy) { | |||
734 | if (!TBAA) | |||
735 | return nullptr; | |||
736 | return TBAA->getTypeInfo(QTy); | |||
737 | } | |||
738 | ||||
739 | TBAAAccessInfo CodeGenModule::getTBAAAccessInfo(QualType AccessType) { | |||
740 | if (!TBAA) | |||
741 | return TBAAAccessInfo(); | |||
742 | if (getLangOpts().CUDAIsDevice) { | |||
743 | // As CUDA builtin surface/texture types are replaced, skip generating TBAA | |||
744 | // access info. | |||
745 | if (AccessType->isCUDADeviceBuiltinSurfaceType()) { | |||
746 | if (getTargetCodeGenInfo().getCUDADeviceBuiltinSurfaceDeviceType() != | |||
747 | nullptr) | |||
748 | return TBAAAccessInfo(); | |||
749 | } else if (AccessType->isCUDADeviceBuiltinTextureType()) { | |||
750 | if (getTargetCodeGenInfo().getCUDADeviceBuiltinTextureDeviceType() != | |||
751 | nullptr) | |||
752 | return TBAAAccessInfo(); | |||
753 | } | |||
754 | } | |||
755 | return TBAA->getAccessInfo(AccessType); | |||
756 | } | |||
757 | ||||
758 | TBAAAccessInfo | |||
759 | CodeGenModule::getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType) { | |||
760 | if (!TBAA) | |||
761 | return TBAAAccessInfo(); | |||
762 | return TBAA->getVTablePtrAccessInfo(VTablePtrType); | |||
763 | } | |||
764 | ||||
765 | llvm::MDNode *CodeGenModule::getTBAAStructInfo(QualType QTy) { | |||
766 | if (!TBAA) | |||
767 | return nullptr; | |||
768 | return TBAA->getTBAAStructInfo(QTy); | |||
769 | } | |||
770 | ||||
771 | llvm::MDNode *CodeGenModule::getTBAABaseTypeInfo(QualType QTy) { | |||
772 | if (!TBAA) | |||
773 | return nullptr; | |||
774 | return TBAA->getBaseTypeInfo(QTy); | |||
775 | } | |||
776 | ||||
777 | llvm::MDNode *CodeGenModule::getTBAAAccessTagInfo(TBAAAccessInfo Info) { | |||
778 | if (!TBAA) | |||
779 | return nullptr; | |||
780 | return TBAA->getAccessTagInfo(Info); | |||
781 | } | |||
782 | ||||
783 | TBAAAccessInfo CodeGenModule::mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo, | |||
784 | TBAAAccessInfo TargetInfo) { | |||
785 | if (!TBAA) | |||
786 | return TBAAAccessInfo(); | |||
787 | return TBAA->mergeTBAAInfoForCast(SourceInfo, TargetInfo); | |||
788 | } | |||
789 | ||||
790 | TBAAAccessInfo | |||
791 | CodeGenModule::mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA, | |||
792 | TBAAAccessInfo InfoB) { | |||
793 | if (!TBAA) | |||
794 | return TBAAAccessInfo(); | |||
795 | return TBAA->mergeTBAAInfoForConditionalOperator(InfoA, InfoB); | |||
796 | } | |||
797 | ||||
798 | TBAAAccessInfo | |||
799 | CodeGenModule::mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo, | |||
800 | TBAAAccessInfo SrcInfo) { | |||
801 | if (!TBAA) | |||
802 | return TBAAAccessInfo(); | |||
803 | return TBAA->mergeTBAAInfoForConditionalOperator(DestInfo, SrcInfo); | |||
804 | } | |||
805 | ||||
806 | void CodeGenModule::DecorateInstructionWithTBAA(llvm::Instruction *Inst, | |||
807 | TBAAAccessInfo TBAAInfo) { | |||
808 | if (llvm::MDNode *Tag = getTBAAAccessTagInfo(TBAAInfo)) | |||
809 | Inst->setMetadata(llvm::LLVMContext::MD_tbaa, Tag); | |||
810 | } | |||
811 | ||||
812 | void CodeGenModule::DecorateInstructionWithInvariantGroup( | |||
813 | llvm::Instruction *I, const CXXRecordDecl *RD) { | |||
814 | I->setMetadata(llvm::LLVMContext::MD_invariant_group, | |||
815 | llvm::MDNode::get(getLLVMContext(), {})); | |||
816 | } | |||
817 | ||||
818 | void CodeGenModule::Error(SourceLocation loc, StringRef message) { | |||
819 | unsigned diagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, "%0"); | |||
820 | getDiags().Report(Context.getFullLoc(loc), diagID) << message; | |||
821 | } | |||
822 | ||||
823 | /// ErrorUnsupported - Print out an error that codegen doesn't support the | |||
824 | /// specified stmt yet. | |||
825 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type) { | |||
826 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, | |||
827 | "cannot compile this %0 yet"); | |||
828 | std::string Msg = Type; | |||
829 | getDiags().Report(Context.getFullLoc(S->getBeginLoc()), DiagID) | |||
830 | << Msg << S->getSourceRange(); | |||
831 | } | |||
832 | ||||
833 | /// ErrorUnsupported - Print out an error that codegen doesn't support the | |||
834 | /// specified decl yet. | |||
835 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type) { | |||
836 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, | |||
837 | "cannot compile this %0 yet"); | |||
838 | std::string Msg = Type; | |||
839 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; | |||
840 | } | |||
841 | ||||
842 | llvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { | |||
843 | return llvm::ConstantInt::get(SizeTy, size.getQuantity()); | |||
844 | } | |||
845 | ||||
846 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, | |||
847 | const NamedDecl *D) const { | |||
848 | if (GV->hasDLLImportStorageClass()) | |||
849 | return; | |||
850 | // Internal definitions always have default visibility. | |||
851 | if (GV->hasLocalLinkage()) { | |||
852 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); | |||
853 | return; | |||
854 | } | |||
855 | if (!D) | |||
856 | return; | |||
857 | // Set visibility for definitions, and for declarations if requested globally | |||
858 | // or set explicitly. | |||
859 | LinkageInfo LV = D->getLinkageAndVisibility(); | |||
860 | if (LV.isVisibilityExplicit() || getLangOpts().SetVisibilityForExternDecls || | |||
861 | !GV->isDeclarationForLinker()) | |||
862 | GV->setVisibility(GetLLVMVisibility(LV.getVisibility())); | |||
863 | } | |||
864 | ||||
865 | static bool shouldAssumeDSOLocal(const CodeGenModule &CGM, | |||
866 | llvm::GlobalValue *GV) { | |||
867 | if (GV->hasLocalLinkage()) | |||
868 | return true; | |||
869 | ||||
870 | if (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()) | |||
871 | return true; | |||
872 | ||||
873 | // DLLImport explicitly marks the GV as external. | |||
874 | if (GV->hasDLLImportStorageClass()) | |||
875 | return false; | |||
876 | ||||
877 | const llvm::Triple &TT = CGM.getTriple(); | |||
878 | if (TT.isWindowsGNUEnvironment()) { | |||
879 | // In MinGW, variables without DLLImport can still be automatically | |||
880 | // imported from a DLL by the linker; don't mark variables that | |||
881 | // potentially could come from another DLL as DSO local. | |||
882 | if (GV->isDeclarationForLinker() && isa<llvm::GlobalVariable>(GV) && | |||
883 | !GV->isThreadLocal()) | |||
884 | return false; | |||
885 | } | |||
886 | ||||
887 | // On COFF, don't mark 'extern_weak' symbols as DSO local. If these symbols | |||
888 | // remain unresolved in the link, they can be resolved to zero, which is | |||
889 | // outside the current DSO. | |||
890 | if (TT.isOSBinFormatCOFF() && GV->hasExternalWeakLinkage()) | |||
891 | return false; | |||
892 | ||||
893 | // Every other GV is local on COFF. | |||
894 | // Make an exception for windows OS in the triple: Some firmware builds use | |||
895 | // *-win32-macho triples. This (accidentally?) produced windows relocations | |||
896 | // without GOT tables in older clang versions; Keep this behaviour. | |||
897 | // FIXME: even thread local variables? | |||
898 | if (TT.isOSBinFormatCOFF() || (TT.isOSWindows() && TT.isOSBinFormatMachO())) | |||
899 | return true; | |||
900 | ||||
901 | // Only handle COFF and ELF for now. | |||
902 | if (!TT.isOSBinFormatELF()) | |||
903 | return false; | |||
904 | ||||
905 | // If this is not an executable, don't assume anything is local. | |||
906 | const auto &CGOpts = CGM.getCodeGenOpts(); | |||
907 | llvm::Reloc::Model RM = CGOpts.RelocationModel; | |||
908 | const auto &LOpts = CGM.getLangOpts(); | |||
909 | if (RM != llvm::Reloc::Static && !LOpts.PIE) | |||
910 | return false; | |||
911 | ||||
912 | // A definition cannot be preempted from an executable. | |||
913 | if (!GV->isDeclarationForLinker()) | |||
914 | return true; | |||
915 | ||||
916 | // Most PIC code sequences that assume that a symbol is local cannot produce a | |||
917 | // 0 if it turns out the symbol is undefined. While this is ABI and relocation | |||
918 | // depended, it seems worth it to handle it here. | |||
919 | if (RM == llvm::Reloc::PIC_ && GV->hasExternalWeakLinkage()) | |||
920 | return false; | |||
921 | ||||
922 | // PPC has no copy relocations and cannot use a plt entry as a symbol address. | |||
923 | llvm::Triple::ArchType Arch = TT.getArch(); | |||
924 | if (Arch == llvm::Triple::ppc || Arch == llvm::Triple::ppc64 || | |||
925 | Arch == llvm::Triple::ppc64le) | |||
926 | return false; | |||
927 | ||||
928 | // If we can use copy relocations we can assume it is local. | |||
929 | if (auto *Var = dyn_cast<llvm::GlobalVariable>(GV)) | |||
930 | if (!Var->isThreadLocal() && | |||
931 | (RM == llvm::Reloc::Static || CGOpts.PIECopyRelocations)) | |||
932 | return true; | |||
933 | ||||
934 | // If we can use a plt entry as the symbol address we can assume it | |||
935 | // is local. | |||
936 | // FIXME: This should work for PIE, but the gold linker doesn't support it. | |||
937 | if (isa<llvm::Function>(GV) && !CGOpts.NoPLT && RM == llvm::Reloc::Static) | |||
938 | return true; | |||
939 | ||||
940 | // Otherwise don't assume it is local. | |||
941 | return false; | |||
942 | } | |||
943 | ||||
944 | void CodeGenModule::setDSOLocal(llvm::GlobalValue *GV) const { | |||
945 | GV->setDSOLocal(shouldAssumeDSOLocal(*this, GV)); | |||
946 | } | |||
947 | ||||
948 | void CodeGenModule::setDLLImportDLLExport(llvm::GlobalValue *GV, | |||
949 | GlobalDecl GD) const { | |||
950 | const auto *D = dyn_cast<NamedDecl>(GD.getDecl()); | |||
951 | // C++ destructors have a few C++ ABI specific special cases. | |||
952 | if (const auto *Dtor = dyn_cast_or_null<CXXDestructorDecl>(D)) { | |||
953 | getCXXABI().setCXXDestructorDLLStorage(GV, Dtor, GD.getDtorType()); | |||
954 | return; | |||
955 | } | |||
956 | setDLLImportDLLExport(GV, D); | |||
957 | } | |||
958 | ||||
959 | void CodeGenModule::setDLLImportDLLExport(llvm::GlobalValue *GV, | |||
960 | const NamedDecl *D) const { | |||
961 | if (D && D->isExternallyVisible()) { | |||
962 | if (D->hasAttr<DLLImportAttr>()) | |||
963 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLImportStorageClass); | |||
964 | else if (D->hasAttr<DLLExportAttr>() && !GV->isDeclarationForLinker()) | |||
965 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLExportStorageClass); | |||
966 | } | |||
967 | } | |||
968 | ||||
969 | void CodeGenModule::setGVProperties(llvm::GlobalValue *GV, | |||
970 | GlobalDecl GD) const { | |||
971 | setDLLImportDLLExport(GV, GD); | |||
972 | setGVPropertiesAux(GV, dyn_cast<NamedDecl>(GD.getDecl())); | |||
973 | } | |||
974 | ||||
975 | void CodeGenModule::setGVProperties(llvm::GlobalValue *GV, | |||
976 | const NamedDecl *D) const { | |||
977 | setDLLImportDLLExport(GV, D); | |||
978 | setGVPropertiesAux(GV, D); | |||
979 | } | |||
980 | ||||
981 | void CodeGenModule::setGVPropertiesAux(llvm::GlobalValue *GV, | |||
982 | const NamedDecl *D) const { | |||
983 | setGlobalVisibility(GV, D); | |||
984 | setDSOLocal(GV); | |||
985 | GV->setPartition(CodeGenOpts.SymbolPartition); | |||
986 | } | |||
987 | ||||
988 | static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel(StringRef S) { | |||
989 | return llvm::StringSwitch<llvm::GlobalVariable::ThreadLocalMode>(S) | |||
990 | .Case("global-dynamic", llvm::GlobalVariable::GeneralDynamicTLSModel) | |||
991 | .Case("local-dynamic", llvm::GlobalVariable::LocalDynamicTLSModel) | |||
992 | .Case("initial-exec", llvm::GlobalVariable::InitialExecTLSModel) | |||
993 | .Case("local-exec", llvm::GlobalVariable::LocalExecTLSModel); | |||
994 | } | |||
995 | ||||
996 | llvm::GlobalVariable::ThreadLocalMode | |||
997 | CodeGenModule::GetDefaultLLVMTLSModel() const { | |||
998 | switch (CodeGenOpts.getDefaultTLSModel()) { | |||
999 | case CodeGenOptions::GeneralDynamicTLSModel: | |||
1000 | return llvm::GlobalVariable::GeneralDynamicTLSModel; | |||
1001 | case CodeGenOptions::LocalDynamicTLSModel: | |||
1002 | return llvm::GlobalVariable::LocalDynamicTLSModel; | |||
1003 | case CodeGenOptions::InitialExecTLSModel: | |||
1004 | return llvm::GlobalVariable::InitialExecTLSModel; | |||
1005 | case CodeGenOptions::LocalExecTLSModel: | |||
1006 | return llvm::GlobalVariable::LocalExecTLSModel; | |||
1007 | } | |||
1008 | llvm_unreachable("Invalid TLS model!")::llvm::llvm_unreachable_internal("Invalid TLS model!", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1008); | |||
1009 | } | |||
1010 | ||||
1011 | void CodeGenModule::setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const { | |||
1012 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1012, __PRETTY_FUNCTION__)); | |||
1013 | ||||
1014 | llvm::GlobalValue::ThreadLocalMode TLM; | |||
1015 | TLM = GetDefaultLLVMTLSModel(); | |||
1016 | ||||
1017 | // Override the TLS model if it is explicitly specified. | |||
1018 | if (const TLSModelAttr *Attr = D.getAttr<TLSModelAttr>()) { | |||
1019 | TLM = GetLLVMTLSModel(Attr->getModel()); | |||
1020 | } | |||
1021 | ||||
1022 | GV->setThreadLocalMode(TLM); | |||
1023 | } | |||
1024 | ||||
1025 | static std::string getCPUSpecificMangling(const CodeGenModule &CGM, | |||
1026 | StringRef Name) { | |||
1027 | const TargetInfo &Target = CGM.getTarget(); | |||
1028 | return (Twine('.') + Twine(Target.CPUSpecificManglingCharacter(Name))).str(); | |||
1029 | } | |||
1030 | ||||
1031 | static void AppendCPUSpecificCPUDispatchMangling(const CodeGenModule &CGM, | |||
1032 | const CPUSpecificAttr *Attr, | |||
1033 | unsigned CPUIndex, | |||
1034 | raw_ostream &Out) { | |||
1035 | // cpu_specific gets the current name, dispatch gets the resolver if IFunc is | |||
1036 | // supported. | |||
1037 | if (Attr) | |||
1038 | Out << getCPUSpecificMangling(CGM, Attr->getCPUName(CPUIndex)->getName()); | |||
1039 | else if (CGM.getTarget().supportsIFunc()) | |||
1040 | Out << ".resolver"; | |||
1041 | } | |||
1042 | ||||
1043 | static void AppendTargetMangling(const CodeGenModule &CGM, | |||
1044 | const TargetAttr *Attr, raw_ostream &Out) { | |||
1045 | if (Attr->isDefaultVersion()) | |||
1046 | return; | |||
1047 | ||||
1048 | Out << '.'; | |||
1049 | const TargetInfo &Target = CGM.getTarget(); | |||
1050 | ParsedTargetAttr Info = | |||
1051 | Attr->parse([&Target](StringRef LHS, StringRef RHS) { | |||
1052 | // Multiversioning doesn't allow "no-${feature}", so we can | |||
1053 | // only have "+" prefixes here. | |||
1054 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1055, __PRETTY_FUNCTION__)) | |||
1055 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1055, __PRETTY_FUNCTION__)); | |||
1056 | return Target.multiVersionSortPriority(LHS.substr(1)) > | |||
1057 | Target.multiVersionSortPriority(RHS.substr(1)); | |||
1058 | }); | |||
1059 | ||||
1060 | bool IsFirst = true; | |||
1061 | ||||
1062 | if (!Info.Architecture.empty()) { | |||
1063 | IsFirst = false; | |||
1064 | Out << "arch_" << Info.Architecture; | |||
1065 | } | |||
1066 | ||||
1067 | for (StringRef Feat : Info.Features) { | |||
1068 | if (!IsFirst) | |||
1069 | Out << '_'; | |||
1070 | IsFirst = false; | |||
1071 | Out << Feat.substr(1); | |||
1072 | } | |||
1073 | } | |||
1074 | ||||
1075 | static std::string getMangledNameImpl(const CodeGenModule &CGM, GlobalDecl GD, | |||
1076 | const NamedDecl *ND, | |||
1077 | bool OmitMultiVersionMangling = false) { | |||
1078 | SmallString<256> Buffer; | |||
1079 | llvm::raw_svector_ostream Out(Buffer); | |||
1080 | MangleContext &MC = CGM.getCXXABI().getMangleContext(); | |||
1081 | if (MC.shouldMangleDeclName(ND)) | |||
1082 | MC.mangleName(GD.getWithDecl(ND), Out); | |||
1083 | else { | |||
1084 | IdentifierInfo *II = ND->getIdentifier(); | |||
1085 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1085, __PRETTY_FUNCTION__)); | |||
1086 | const auto *FD = dyn_cast<FunctionDecl>(ND); | |||
1087 | ||||
1088 | if (FD && | |||
1089 | FD->getType()->castAs<FunctionType>()->getCallConv() == CC_X86RegCall) { | |||
1090 | Out << "__regcall3__" << II->getName(); | |||
1091 | } else if (FD && FD->hasAttr<CUDAGlobalAttr>() && | |||
1092 | GD.getKernelReferenceKind() == KernelReferenceKind::Stub) { | |||
1093 | Out << "__device_stub__" << II->getName(); | |||
1094 | } else { | |||
1095 | Out << II->getName(); | |||
1096 | } | |||
1097 | } | |||
1098 | ||||
1099 | if (const auto *FD = dyn_cast<FunctionDecl>(ND)) | |||
1100 | if (FD->isMultiVersion() && !OmitMultiVersionMangling) { | |||
1101 | switch (FD->getMultiVersionKind()) { | |||
1102 | case MultiVersionKind::CPUDispatch: | |||
1103 | case MultiVersionKind::CPUSpecific: | |||
1104 | AppendCPUSpecificCPUDispatchMangling(CGM, | |||
1105 | FD->getAttr<CPUSpecificAttr>(), | |||
1106 | GD.getMultiVersionIndex(), Out); | |||
1107 | break; | |||
1108 | case MultiVersionKind::Target: | |||
1109 | AppendTargetMangling(CGM, FD->getAttr<TargetAttr>(), Out); | |||
1110 | break; | |||
1111 | case MultiVersionKind::None: | |||
1112 | llvm_unreachable("None multiversion type isn't valid here")::llvm::llvm_unreachable_internal("None multiversion type isn't valid here" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1112); | |||
1113 | } | |||
1114 | } | |||
1115 | ||||
1116 | return std::string(Out.str()); | |||
1117 | } | |||
1118 | ||||
1119 | void CodeGenModule::UpdateMultiVersionNames(GlobalDecl GD, | |||
1120 | const FunctionDecl *FD) { | |||
1121 | if (!FD->isMultiVersion()) | |||
1122 | return; | |||
1123 | ||||
1124 | // Get the name of what this would be without the 'target' attribute. This | |||
1125 | // allows us to lookup the version that was emitted when this wasn't a | |||
1126 | // multiversion function. | |||
1127 | std::string NonTargetName = | |||
1128 | getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
1129 | GlobalDecl OtherGD; | |||
1130 | if (lookupRepresentativeDecl(NonTargetName, OtherGD)) { | |||
1131 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1135, __PRETTY_FUNCTION__)) | |||
1132 | .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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1135, __PRETTY_FUNCTION__)) | |||
1133 | ->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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1135, __PRETTY_FUNCTION__)) | |||
1134 | ->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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1135, __PRETTY_FUNCTION__)) | |||
1135 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1135, __PRETTY_FUNCTION__)); | |||
1136 | // OtherFD is the version of this function that was mangled BEFORE | |||
1137 | // becoming a MultiVersion function. It potentially needs to be updated. | |||
1138 | const FunctionDecl *OtherFD = OtherGD.getCanonicalDecl() | |||
1139 | .getDecl() | |||
1140 | ->getAsFunction() | |||
1141 | ->getMostRecentDecl(); | |||
1142 | std::string OtherName = getMangledNameImpl(*this, OtherGD, OtherFD); | |||
1143 | // This is so that if the initial version was already the 'default' | |||
1144 | // version, we don't try to update it. | |||
1145 | if (OtherName != NonTargetName) { | |||
1146 | // Remove instead of erase, since others may have stored the StringRef | |||
1147 | // to this. | |||
1148 | const auto ExistingRecord = Manglings.find(NonTargetName); | |||
1149 | if (ExistingRecord != std::end(Manglings)) | |||
1150 | Manglings.remove(&(*ExistingRecord)); | |||
1151 | auto Result = Manglings.insert(std::make_pair(OtherName, OtherGD)); | |||
1152 | MangledDeclNames[OtherGD.getCanonicalDecl()] = Result.first->first(); | |||
1153 | if (llvm::GlobalValue *Entry = GetGlobalValue(NonTargetName)) | |||
1154 | Entry->setName(OtherName); | |||
1155 | } | |||
1156 | } | |||
1157 | } | |||
1158 | ||||
1159 | StringRef CodeGenModule::getMangledName(GlobalDecl GD) { | |||
1160 | GlobalDecl CanonicalGD = GD.getCanonicalDecl(); | |||
1161 | ||||
1162 | // Some ABIs don't have constructor variants. Make sure that base and | |||
1163 | // complete constructors get mangled the same. | |||
1164 | if (const auto *CD = dyn_cast<CXXConstructorDecl>(CanonicalGD.getDecl())) { | |||
1165 | if (!getTarget().getCXXABI().hasConstructorVariants()) { | |||
1166 | CXXCtorType OrigCtorType = GD.getCtorType(); | |||
1167 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1167, __PRETTY_FUNCTION__)); | |||
1168 | if (OrigCtorType == Ctor_Base) | |||
1169 | CanonicalGD = GlobalDecl(CD, Ctor_Complete); | |||
1170 | } | |||
1171 | } | |||
1172 | ||||
1173 | auto FoundName = MangledDeclNames.find(CanonicalGD); | |||
1174 | if (FoundName != MangledDeclNames.end()) | |||
1175 | return FoundName->second; | |||
1176 | ||||
1177 | // Keep the first result in the case of a mangling collision. | |||
1178 | const auto *ND = cast<NamedDecl>(GD.getDecl()); | |||
1179 | std::string MangledName = getMangledNameImpl(*this, GD, ND); | |||
1180 | ||||
1181 | // Ensure either we have different ABIs between host and device compilations, | |||
1182 | // says host compilation following MSVC ABI but device compilation follows | |||
1183 | // Itanium C++ ABI or, if they follow the same ABI, kernel names after | |||
1184 | // mangling should be the same after name stubbing. The later checking is | |||
1185 | // very important as the device kernel name being mangled in host-compilation | |||
1186 | // is used to resolve the device binaries to be executed. Inconsistent naming | |||
1187 | // result in undefined behavior. Even though we cannot check that naming | |||
1188 | // directly between host- and device-compilations, the host- and | |||
1189 | // device-mangling in host compilation could help catching certain ones. | |||
1190 | assert(!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() ||((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1191 | getLangOpts().CUDAIsDevice ||((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1192 | (getContext().getAuxTargetInfo() &&((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1193 | (getContext().getAuxTargetInfo()->getCXXABI() !=((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1194 | getContext().getTargetInfo().getCXXABI())) ||((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1195 | getCUDARuntime().getDeviceSideName(ND) ==((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1196 | getMangledNameImpl(((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1197 | *this,((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1198 | GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel),((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)) | |||
1199 | ND))((!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr >() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? static_cast<void> (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1199, __PRETTY_FUNCTION__)); | |||
1200 | ||||
1201 | auto Result = Manglings.insert(std::make_pair(MangledName, GD)); | |||
1202 | return MangledDeclNames[CanonicalGD] = Result.first->first(); | |||
1203 | } | |||
1204 | ||||
1205 | StringRef CodeGenModule::getBlockMangledName(GlobalDecl GD, | |||
1206 | const BlockDecl *BD) { | |||
1207 | MangleContext &MangleCtx = getCXXABI().getMangleContext(); | |||
1208 | const Decl *D = GD.getDecl(); | |||
1209 | ||||
1210 | SmallString<256> Buffer; | |||
1211 | llvm::raw_svector_ostream Out(Buffer); | |||
1212 | if (!D) | |||
1213 | MangleCtx.mangleGlobalBlock(BD, | |||
1214 | dyn_cast_or_null<VarDecl>(initializedGlobalDecl.getDecl()), Out); | |||
1215 | else if (const auto *CD = dyn_cast<CXXConstructorDecl>(D)) | |||
1216 | MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); | |||
1217 | else if (const auto *DD = dyn_cast<CXXDestructorDecl>(D)) | |||
1218 | MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); | |||
1219 | else | |||
1220 | MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); | |||
1221 | ||||
1222 | auto Result = Manglings.insert(std::make_pair(Out.str(), BD)); | |||
1223 | return Result.first->first(); | |||
1224 | } | |||
1225 | ||||
1226 | llvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { | |||
1227 | return getModule().getNamedValue(Name); | |||
1228 | } | |||
1229 | ||||
1230 | /// AddGlobalCtor - Add a function to the list that will be called before | |||
1231 | /// main() runs. | |||
1232 | void CodeGenModule::AddGlobalCtor(llvm::Function *Ctor, int Priority, | |||
1233 | llvm::Constant *AssociatedData) { | |||
1234 | // FIXME: Type coercion of void()* types. | |||
1235 | GlobalCtors.push_back(Structor(Priority, Ctor, AssociatedData)); | |||
1236 | } | |||
1237 | ||||
1238 | /// AddGlobalDtor - Add a function to the list that will be called | |||
1239 | /// when the module is unloaded. | |||
1240 | void CodeGenModule::AddGlobalDtor(llvm::Function *Dtor, int Priority) { | |||
1241 | if (CodeGenOpts.RegisterGlobalDtorsWithAtExit) { | |||
1242 | if (getCXXABI().useSinitAndSterm()) | |||
1243 | llvm::report_fatal_error( | |||
1244 | "register global dtors with atexit() is not supported yet"); | |||
1245 | DtorsUsingAtExit[Priority].push_back(Dtor); | |||
1246 | return; | |||
1247 | } | |||
1248 | ||||
1249 | // FIXME: Type coercion of void()* types. | |||
1250 | GlobalDtors.push_back(Structor(Priority, Dtor, nullptr)); | |||
1251 | } | |||
1252 | ||||
1253 | void CodeGenModule::EmitCtorList(CtorList &Fns, const char *GlobalName) { | |||
1254 | if (Fns.empty()) return; | |||
1255 | ||||
1256 | // Ctor function type is void()*. | |||
1257 | llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); | |||
1258 | llvm::Type *CtorPFTy = llvm::PointerType::get(CtorFTy, | |||
1259 | TheModule.getDataLayout().getProgramAddressSpace()); | |||
1260 | ||||
1261 | // Get the type of a ctor entry, { i32, void ()*, i8* }. | |||
1262 | llvm::StructType *CtorStructTy = llvm::StructType::get( | |||
1263 | Int32Ty, CtorPFTy, VoidPtrTy); | |||
1264 | ||||
1265 | // Construct the constructor and destructor arrays. | |||
1266 | ConstantInitBuilder builder(*this); | |||
1267 | auto ctors = builder.beginArray(CtorStructTy); | |||
1268 | for (const auto &I : Fns) { | |||
1269 | auto ctor = ctors.beginStruct(CtorStructTy); | |||
1270 | ctor.addInt(Int32Ty, I.Priority); | |||
1271 | ctor.add(llvm::ConstantExpr::getBitCast(I.Initializer, CtorPFTy)); | |||
1272 | if (I.AssociatedData) | |||
1273 | ctor.add(llvm::ConstantExpr::getBitCast(I.AssociatedData, VoidPtrTy)); | |||
1274 | else | |||
1275 | ctor.addNullPointer(VoidPtrTy); | |||
1276 | ctor.finishAndAddTo(ctors); | |||
1277 | } | |||
1278 | ||||
1279 | auto list = | |||
1280 | ctors.finishAndCreateGlobal(GlobalName, getPointerAlign(), | |||
1281 | /*constant*/ false, | |||
1282 | llvm::GlobalValue::AppendingLinkage); | |||
1283 | ||||
1284 | // The LTO linker doesn't seem to like it when we set an alignment | |||
1285 | // on appending variables. Take it off as a workaround. | |||
1286 | list->setAlignment(llvm::None); | |||
1287 | ||||
1288 | Fns.clear(); | |||
1289 | } | |||
1290 | ||||
1291 | llvm::GlobalValue::LinkageTypes | |||
1292 | CodeGenModule::getFunctionLinkage(GlobalDecl GD) { | |||
1293 | const auto *D = cast<FunctionDecl>(GD.getDecl()); | |||
1294 | ||||
1295 | GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); | |||
1296 | ||||
1297 | if (const auto *Dtor = dyn_cast<CXXDestructorDecl>(D)) | |||
1298 | return getCXXABI().getCXXDestructorLinkage(Linkage, Dtor, GD.getDtorType()); | |||
1299 | ||||
1300 | if (isa<CXXConstructorDecl>(D) && | |||
1301 | cast<CXXConstructorDecl>(D)->isInheritingConstructor() && | |||
1302 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
1303 | // Our approach to inheriting constructors is fundamentally different from | |||
1304 | // that used by the MS ABI, so keep our inheriting constructor thunks | |||
1305 | // internal rather than trying to pick an unambiguous mangling for them. | |||
1306 | return llvm::GlobalValue::InternalLinkage; | |||
1307 | } | |||
1308 | ||||
1309 | return getLLVMLinkageForDeclarator(D, Linkage, /*IsConstantVariable=*/false); | |||
1310 | } | |||
1311 | ||||
1312 | llvm::ConstantInt *CodeGenModule::CreateCrossDsoCfiTypeId(llvm::Metadata *MD) { | |||
1313 | llvm::MDString *MDS = dyn_cast<llvm::MDString>(MD); | |||
1314 | if (!MDS) return nullptr; | |||
1315 | ||||
1316 | return llvm::ConstantInt::get(Int64Ty, llvm::MD5Hash(MDS->getString())); | |||
1317 | } | |||
1318 | ||||
1319 | void CodeGenModule::SetLLVMFunctionAttributes(GlobalDecl GD, | |||
1320 | const CGFunctionInfo &Info, | |||
1321 | llvm::Function *F) { | |||
1322 | unsigned CallingConv; | |||
1323 | llvm::AttributeList PAL; | |||
1324 | ConstructAttributeList(F->getName(), Info, GD, PAL, CallingConv, false); | |||
1325 | F->setAttributes(PAL); | |||
1326 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); | |||
1327 | } | |||
1328 | ||||
1329 | static void removeImageAccessQualifier(std::string& TyName) { | |||
1330 | std::string ReadOnlyQual("__read_only"); | |||
1331 | std::string::size_type ReadOnlyPos = TyName.find(ReadOnlyQual); | |||
1332 | if (ReadOnlyPos != std::string::npos) | |||
1333 | // "+ 1" for the space after access qualifier. | |||
1334 | TyName.erase(ReadOnlyPos, ReadOnlyQual.size() + 1); | |||
1335 | else { | |||
1336 | std::string WriteOnlyQual("__write_only"); | |||
1337 | std::string::size_type WriteOnlyPos = TyName.find(WriteOnlyQual); | |||
1338 | if (WriteOnlyPos != std::string::npos) | |||
1339 | TyName.erase(WriteOnlyPos, WriteOnlyQual.size() + 1); | |||
1340 | else { | |||
1341 | std::string ReadWriteQual("__read_write"); | |||
1342 | std::string::size_type ReadWritePos = TyName.find(ReadWriteQual); | |||
1343 | if (ReadWritePos != std::string::npos) | |||
1344 | TyName.erase(ReadWritePos, ReadWriteQual.size() + 1); | |||
1345 | } | |||
1346 | } | |||
1347 | } | |||
1348 | ||||
1349 | // Returns the address space id that should be produced to the | |||
1350 | // kernel_arg_addr_space metadata. This is always fixed to the ids | |||
1351 | // as specified in the SPIR 2.0 specification in order to differentiate | |||
1352 | // for example in clGetKernelArgInfo() implementation between the address | |||
1353 | // spaces with targets without unique mapping to the OpenCL address spaces | |||
1354 | // (basically all single AS CPUs). | |||
1355 | static unsigned ArgInfoAddressSpace(LangAS AS) { | |||
1356 | switch (AS) { | |||
1357 | case LangAS::opencl_global: | |||
1358 | return 1; | |||
1359 | case LangAS::opencl_constant: | |||
1360 | return 2; | |||
1361 | case LangAS::opencl_local: | |||
1362 | return 3; | |||
1363 | case LangAS::opencl_generic: | |||
1364 | return 4; // Not in SPIR 2.0 specs. | |||
1365 | case LangAS::opencl_global_device: | |||
1366 | return 5; | |||
1367 | case LangAS::opencl_global_host: | |||
1368 | return 6; | |||
1369 | default: | |||
1370 | return 0; // Assume private. | |||
1371 | } | |||
1372 | } | |||
1373 | ||||
1374 | void CodeGenModule::GenOpenCLArgMetadata(llvm::Function *Fn, | |||
1375 | const FunctionDecl *FD, | |||
1376 | CodeGenFunction *CGF) { | |||
1377 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1378, __PRETTY_FUNCTION__)) | |||
1378 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1378, __PRETTY_FUNCTION__)); | |||
1379 | // Create MDNodes that represent the kernel arg metadata. | |||
1380 | // Each MDNode is a list in the form of "key", N number of values which is | |||
1381 | // the same number of values as their are kernel arguments. | |||
1382 | ||||
1383 | const PrintingPolicy &Policy = Context.getPrintingPolicy(); | |||
1384 | ||||
1385 | // MDNode for the kernel argument address space qualifiers. | |||
1386 | SmallVector<llvm::Metadata *, 8> addressQuals; | |||
1387 | ||||
1388 | // MDNode for the kernel argument access qualifiers (images only). | |||
1389 | SmallVector<llvm::Metadata *, 8> accessQuals; | |||
1390 | ||||
1391 | // MDNode for the kernel argument type names. | |||
1392 | SmallVector<llvm::Metadata *, 8> argTypeNames; | |||
1393 | ||||
1394 | // MDNode for the kernel argument base type names. | |||
1395 | SmallVector<llvm::Metadata *, 8> argBaseTypeNames; | |||
1396 | ||||
1397 | // MDNode for the kernel argument type qualifiers. | |||
1398 | SmallVector<llvm::Metadata *, 8> argTypeQuals; | |||
1399 | ||||
1400 | // MDNode for the kernel argument names. | |||
1401 | SmallVector<llvm::Metadata *, 8> argNames; | |||
1402 | ||||
1403 | if (FD && CGF) | |||
1404 | for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) { | |||
1405 | const ParmVarDecl *parm = FD->getParamDecl(i); | |||
1406 | QualType ty = parm->getType(); | |||
1407 | std::string typeQuals; | |||
1408 | ||||
1409 | if (ty->isPointerType()) { | |||
1410 | QualType pointeeTy = ty->getPointeeType(); | |||
1411 | ||||
1412 | // Get address qualifier. | |||
1413 | addressQuals.push_back( | |||
1414 | llvm::ConstantAsMetadata::get(CGF->Builder.getInt32( | |||
1415 | ArgInfoAddressSpace(pointeeTy.getAddressSpace())))); | |||
1416 | ||||
1417 | // Get argument type name. | |||
1418 | std::string typeName = | |||
1419 | pointeeTy.getUnqualifiedType().getAsString(Policy) + "*"; | |||
1420 | ||||
1421 | // Turn "unsigned type" to "utype" | |||
1422 | std::string::size_type pos = typeName.find("unsigned"); | |||
1423 | if (pointeeTy.isCanonical() && pos != std::string::npos) | |||
1424 | typeName.erase(pos + 1, 8); | |||
1425 | ||||
1426 | argTypeNames.push_back(llvm::MDString::get(VMContext, typeName)); | |||
1427 | ||||
1428 | std::string baseTypeName = | |||
1429 | pointeeTy.getUnqualifiedType().getCanonicalType().getAsString( | |||
1430 | Policy) + | |||
1431 | "*"; | |||
1432 | ||||
1433 | // Turn "unsigned type" to "utype" | |||
1434 | pos = baseTypeName.find("unsigned"); | |||
1435 | if (pos != std::string::npos) | |||
1436 | baseTypeName.erase(pos + 1, 8); | |||
1437 | ||||
1438 | argBaseTypeNames.push_back( | |||
1439 | llvm::MDString::get(VMContext, baseTypeName)); | |||
1440 | ||||
1441 | // Get argument type qualifiers: | |||
1442 | if (ty.isRestrictQualified()) | |||
1443 | typeQuals = "restrict"; | |||
1444 | if (pointeeTy.isConstQualified() || | |||
1445 | (pointeeTy.getAddressSpace() == LangAS::opencl_constant)) | |||
1446 | typeQuals += typeQuals.empty() ? "const" : " const"; | |||
1447 | if (pointeeTy.isVolatileQualified()) | |||
1448 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; | |||
1449 | } else { | |||
1450 | uint32_t AddrSpc = 0; | |||
1451 | bool isPipe = ty->isPipeType(); | |||
1452 | if (ty->isImageType() || isPipe) | |||
1453 | AddrSpc = ArgInfoAddressSpace(LangAS::opencl_global); | |||
1454 | ||||
1455 | addressQuals.push_back( | |||
1456 | llvm::ConstantAsMetadata::get(CGF->Builder.getInt32(AddrSpc))); | |||
1457 | ||||
1458 | // Get argument type name. | |||
1459 | std::string typeName; | |||
1460 | if (isPipe) | |||
1461 | typeName = ty.getCanonicalType() | |||
1462 | ->castAs<PipeType>() | |||
1463 | ->getElementType() | |||
1464 | .getAsString(Policy); | |||
1465 | else | |||
1466 | typeName = ty.getUnqualifiedType().getAsString(Policy); | |||
1467 | ||||
1468 | // Turn "unsigned type" to "utype" | |||
1469 | std::string::size_type pos = typeName.find("unsigned"); | |||
1470 | if (ty.isCanonical() && pos != std::string::npos) | |||
1471 | typeName.erase(pos + 1, 8); | |||
1472 | ||||
1473 | std::string baseTypeName; | |||
1474 | if (isPipe) | |||
1475 | baseTypeName = ty.getCanonicalType() | |||
1476 | ->castAs<PipeType>() | |||
1477 | ->getElementType() | |||
1478 | .getCanonicalType() | |||
1479 | .getAsString(Policy); | |||
1480 | else | |||
1481 | baseTypeName = | |||
1482 | ty.getUnqualifiedType().getCanonicalType().getAsString(Policy); | |||
1483 | ||||
1484 | // Remove access qualifiers on images | |||
1485 | // (as they are inseparable from type in clang implementation, | |||
1486 | // but OpenCL spec provides a special query to get access qualifier | |||
1487 | // via clGetKernelArgInfo with CL_KERNEL_ARG_ACCESS_QUALIFIER): | |||
1488 | if (ty->isImageType()) { | |||
1489 | removeImageAccessQualifier(typeName); | |||
1490 | removeImageAccessQualifier(baseTypeName); | |||
1491 | } | |||
1492 | ||||
1493 | argTypeNames.push_back(llvm::MDString::get(VMContext, typeName)); | |||
1494 | ||||
1495 | // Turn "unsigned type" to "utype" | |||
1496 | pos = baseTypeName.find("unsigned"); | |||
1497 | if (pos != std::string::npos) | |||
1498 | baseTypeName.erase(pos + 1, 8); | |||
1499 | ||||
1500 | argBaseTypeNames.push_back( | |||
1501 | llvm::MDString::get(VMContext, baseTypeName)); | |||
1502 | ||||
1503 | if (isPipe) | |||
1504 | typeQuals = "pipe"; | |||
1505 | } | |||
1506 | ||||
1507 | argTypeQuals.push_back(llvm::MDString::get(VMContext, typeQuals)); | |||
1508 | ||||
1509 | // Get image and pipe access qualifier: | |||
1510 | if (ty->isImageType() || ty->isPipeType()) { | |||
1511 | const Decl *PDecl = parm; | |||
1512 | if (auto *TD = dyn_cast<TypedefType>(ty)) | |||
1513 | PDecl = TD->getDecl(); | |||
1514 | const OpenCLAccessAttr *A = PDecl->getAttr<OpenCLAccessAttr>(); | |||
1515 | if (A && A->isWriteOnly()) | |||
1516 | accessQuals.push_back(llvm::MDString::get(VMContext, "write_only")); | |||
1517 | else if (A && A->isReadWrite()) | |||
1518 | accessQuals.push_back(llvm::MDString::get(VMContext, "read_write")); | |||
1519 | else | |||
1520 | accessQuals.push_back(llvm::MDString::get(VMContext, "read_only")); | |||
1521 | } else | |||
1522 | accessQuals.push_back(llvm::MDString::get(VMContext, "none")); | |||
1523 | ||||
1524 | // Get argument name. | |||
1525 | argNames.push_back(llvm::MDString::get(VMContext, parm->getName())); | |||
1526 | } | |||
1527 | ||||
1528 | Fn->setMetadata("kernel_arg_addr_space", | |||
1529 | llvm::MDNode::get(VMContext, addressQuals)); | |||
1530 | Fn->setMetadata("kernel_arg_access_qual", | |||
1531 | llvm::MDNode::get(VMContext, accessQuals)); | |||
1532 | Fn->setMetadata("kernel_arg_type", | |||
1533 | llvm::MDNode::get(VMContext, argTypeNames)); | |||
1534 | Fn->setMetadata("kernel_arg_base_type", | |||
1535 | llvm::MDNode::get(VMContext, argBaseTypeNames)); | |||
1536 | Fn->setMetadata("kernel_arg_type_qual", | |||
1537 | llvm::MDNode::get(VMContext, argTypeQuals)); | |||
1538 | if (getCodeGenOpts().EmitOpenCLArgMetadata) | |||
1539 | Fn->setMetadata("kernel_arg_name", | |||
1540 | llvm::MDNode::get(VMContext, argNames)); | |||
1541 | } | |||
1542 | ||||
1543 | /// Determines whether the language options require us to model | |||
1544 | /// unwind exceptions. We treat -fexceptions as mandating this | |||
1545 | /// except under the fragile ObjC ABI with only ObjC exceptions | |||
1546 | /// enabled. This means, for example, that C with -fexceptions | |||
1547 | /// enables this. | |||
1548 | static bool hasUnwindExceptions(const LangOptions &LangOpts) { | |||
1549 | // If exceptions are completely disabled, obviously this is false. | |||
1550 | if (!LangOpts.Exceptions) return false; | |||
1551 | ||||
1552 | // If C++ exceptions are enabled, this is true. | |||
1553 | if (LangOpts.CXXExceptions) return true; | |||
1554 | ||||
1555 | // If ObjC exceptions are enabled, this depends on the ABI. | |||
1556 | if (LangOpts.ObjCExceptions) { | |||
1557 | return LangOpts.ObjCRuntime.hasUnwindExceptions(); | |||
1558 | } | |||
1559 | ||||
1560 | return true; | |||
1561 | } | |||
1562 | ||||
1563 | static bool requiresMemberFunctionPointerTypeMetadata(CodeGenModule &CGM, | |||
1564 | const CXXMethodDecl *MD) { | |||
1565 | // Check that the type metadata can ever actually be used by a call. | |||
1566 | if (!CGM.getCodeGenOpts().LTOUnit || | |||
1567 | !CGM.HasHiddenLTOVisibility(MD->getParent())) | |||
1568 | return false; | |||
1569 | ||||
1570 | // Only functions whose address can be taken with a member function pointer | |||
1571 | // need this sort of type metadata. | |||
1572 | return !MD->isStatic() && !MD->isVirtual() && !isa<CXXConstructorDecl>(MD) && | |||
1573 | !isa<CXXDestructorDecl>(MD); | |||
1574 | } | |||
1575 | ||||
1576 | std::vector<const CXXRecordDecl *> | |||
1577 | CodeGenModule::getMostBaseClasses(const CXXRecordDecl *RD) { | |||
1578 | llvm::SetVector<const CXXRecordDecl *> MostBases; | |||
1579 | ||||
1580 | std::function<void (const CXXRecordDecl *)> CollectMostBases; | |||
1581 | CollectMostBases = [&](const CXXRecordDecl *RD) { | |||
1582 | if (RD->getNumBases() == 0) | |||
1583 | MostBases.insert(RD); | |||
1584 | for (const CXXBaseSpecifier &B : RD->bases()) | |||
1585 | CollectMostBases(B.getType()->getAsCXXRecordDecl()); | |||
1586 | }; | |||
1587 | CollectMostBases(RD); | |||
1588 | return MostBases.takeVector(); | |||
1589 | } | |||
1590 | ||||
1591 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, | |||
1592 | llvm::Function *F) { | |||
1593 | llvm::AttrBuilder B; | |||
1594 | ||||
1595 | if (CodeGenOpts.UnwindTables) | |||
1596 | B.addAttribute(llvm::Attribute::UWTable); | |||
1597 | ||||
1598 | if (CodeGenOpts.StackClashProtector) | |||
1599 | B.addAttribute("probe-stack", "inline-asm"); | |||
1600 | ||||
1601 | if (!hasUnwindExceptions(LangOpts)) | |||
1602 | B.addAttribute(llvm::Attribute::NoUnwind); | |||
1603 | ||||
1604 | if (D && D->hasAttr<NoStackProtectorAttr>()) | |||
1605 | B.addAttribute(llvm::Attribute::NoStackProtect); | |||
1606 | else if (LangOpts.getStackProtector() == LangOptions::SSPOn) | |||
1607 | B.addAttribute(llvm::Attribute::StackProtect); | |||
1608 | else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) | |||
1609 | B.addAttribute(llvm::Attribute::StackProtectStrong); | |||
1610 | else if (LangOpts.getStackProtector() == LangOptions::SSPReq) | |||
1611 | B.addAttribute(llvm::Attribute::StackProtectReq); | |||
1612 | ||||
1613 | if (!D) { | |||
1614 | // If we don't have a declaration to control inlining, the function isn't | |||
1615 | // explicitly marked as alwaysinline for semantic reasons, and inlining is | |||
1616 | // disabled, mark the function as noinline. | |||
1617 | if (!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && | |||
1618 | CodeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) | |||
1619 | B.addAttribute(llvm::Attribute::NoInline); | |||
1620 | ||||
1621 | F->addAttributes(llvm::AttributeList::FunctionIndex, B); | |||
1622 | return; | |||
1623 | } | |||
1624 | ||||
1625 | // Track whether we need to add the optnone LLVM attribute, | |||
1626 | // starting with the default for this optimization level. | |||
1627 | bool ShouldAddOptNone = | |||
1628 | !CodeGenOpts.DisableO0ImplyOptNone && CodeGenOpts.OptimizationLevel == 0; | |||
1629 | // We can't add optnone in the following cases, it won't pass the verifier. | |||
1630 | ShouldAddOptNone &= !D->hasAttr<MinSizeAttr>(); | |||
1631 | ShouldAddOptNone &= !D->hasAttr<AlwaysInlineAttr>(); | |||
1632 | ||||
1633 | // Add optnone, but do so only if the function isn't always_inline. | |||
1634 | if ((ShouldAddOptNone || D->hasAttr<OptimizeNoneAttr>()) && | |||
1635 | !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
1636 | B.addAttribute(llvm::Attribute::OptimizeNone); | |||
1637 | ||||
1638 | // OptimizeNone implies noinline; we should not be inlining such functions. | |||
1639 | B.addAttribute(llvm::Attribute::NoInline); | |||
1640 | ||||
1641 | // We still need to handle naked functions even though optnone subsumes | |||
1642 | // much of their semantics. | |||
1643 | if (D->hasAttr<NakedAttr>()) | |||
1644 | B.addAttribute(llvm::Attribute::Naked); | |||
1645 | ||||
1646 | // OptimizeNone wins over OptimizeForSize and MinSize. | |||
1647 | F->removeFnAttr(llvm::Attribute::OptimizeForSize); | |||
1648 | F->removeFnAttr(llvm::Attribute::MinSize); | |||
1649 | } else if (D->hasAttr<NakedAttr>()) { | |||
1650 | // Naked implies noinline: we should not be inlining such functions. | |||
1651 | B.addAttribute(llvm::Attribute::Naked); | |||
1652 | B.addAttribute(llvm::Attribute::NoInline); | |||
1653 | } else if (D->hasAttr<NoDuplicateAttr>()) { | |||
1654 | B.addAttribute(llvm::Attribute::NoDuplicate); | |||
1655 | } else if (D->hasAttr<NoInlineAttr>() && !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
1656 | // Add noinline if the function isn't always_inline. | |||
1657 | B.addAttribute(llvm::Attribute::NoInline); | |||
1658 | } else if (D->hasAttr<AlwaysInlineAttr>() && | |||
1659 | !F->hasFnAttribute(llvm::Attribute::NoInline)) { | |||
1660 | // (noinline wins over always_inline, and we can't specify both in IR) | |||
1661 | B.addAttribute(llvm::Attribute::AlwaysInline); | |||
1662 | } else if (CodeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) { | |||
1663 | // If we're not inlining, then force everything that isn't always_inline to | |||
1664 | // carry an explicit noinline attribute. | |||
1665 | if (!F->hasFnAttribute(llvm::Attribute::AlwaysInline)) | |||
1666 | B.addAttribute(llvm::Attribute::NoInline); | |||
1667 | } else { | |||
1668 | // Otherwise, propagate the inline hint attribute and potentially use its | |||
1669 | // absence to mark things as noinline. | |||
1670 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
1671 | // Search function and template pattern redeclarations for inline. | |||
1672 | auto CheckForInline = [](const FunctionDecl *FD) { | |||
1673 | auto CheckRedeclForInline = [](const FunctionDecl *Redecl) { | |||
1674 | return Redecl->isInlineSpecified(); | |||
1675 | }; | |||
1676 | if (any_of(FD->redecls(), CheckRedeclForInline)) | |||
1677 | return true; | |||
1678 | const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern(); | |||
1679 | if (!Pattern) | |||
1680 | return false; | |||
1681 | return any_of(Pattern->redecls(), CheckRedeclForInline); | |||
1682 | }; | |||
1683 | if (CheckForInline(FD)) { | |||
1684 | B.addAttribute(llvm::Attribute::InlineHint); | |||
1685 | } else if (CodeGenOpts.getInlining() == | |||
1686 | CodeGenOptions::OnlyHintInlining && | |||
1687 | !FD->isInlined() && | |||
1688 | !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
1689 | B.addAttribute(llvm::Attribute::NoInline); | |||
1690 | } | |||
1691 | } | |||
1692 | } | |||
1693 | ||||
1694 | // Add other optimization related attributes if we are optimizing this | |||
1695 | // function. | |||
1696 | if (!D->hasAttr<OptimizeNoneAttr>()) { | |||
1697 | if (D->hasAttr<ColdAttr>()) { | |||
1698 | if (!ShouldAddOptNone) | |||
1699 | B.addAttribute(llvm::Attribute::OptimizeForSize); | |||
1700 | B.addAttribute(llvm::Attribute::Cold); | |||
1701 | } | |||
1702 | ||||
1703 | if (D->hasAttr<MinSizeAttr>()) | |||
1704 | B.addAttribute(llvm::Attribute::MinSize); | |||
1705 | } | |||
1706 | ||||
1707 | F->addAttributes(llvm::AttributeList::FunctionIndex, B); | |||
1708 | ||||
1709 | unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); | |||
1710 | if (alignment) | |||
1711 | F->setAlignment(llvm::Align(alignment)); | |||
1712 | ||||
1713 | if (!D->hasAttr<AlignedAttr>()) | |||
1714 | if (LangOpts.FunctionAlignment) | |||
1715 | F->setAlignment(llvm::Align(1ull << LangOpts.FunctionAlignment)); | |||
1716 | ||||
1717 | // Some C++ ABIs require 2-byte alignment for member functions, in order to | |||
1718 | // reserve a bit for differentiating between virtual and non-virtual member | |||
1719 | // functions. If the current target's C++ ABI requires this and this is a | |||
1720 | // member function, set its alignment accordingly. | |||
1721 | if (getTarget().getCXXABI().areMemberFunctionsAligned()) { | |||
1722 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) | |||
1723 | F->setAlignment(llvm::Align(2)); | |||
1724 | } | |||
1725 | ||||
1726 | // In the cross-dso CFI mode with canonical jump tables, we want !type | |||
1727 | // attributes on definitions only. | |||
1728 | if (CodeGenOpts.SanitizeCfiCrossDso && | |||
1729 | CodeGenOpts.SanitizeCfiCanonicalJumpTables) { | |||
1730 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
1731 | // Skip available_externally functions. They won't be codegen'ed in the | |||
1732 | // current module anyway. | |||
1733 | if (getContext().GetGVALinkageForFunction(FD) != GVA_AvailableExternally) | |||
1734 | CreateFunctionTypeMetadataForIcall(FD, F); | |||
1735 | } | |||
1736 | } | |||
1737 | ||||
1738 | // Emit type metadata on member functions for member function pointer checks. | |||
1739 | // These are only ever necessary on definitions; we're guaranteed that the | |||
1740 | // definition will be present in the LTO unit as a result of LTO visibility. | |||
1741 | auto *MD = dyn_cast<CXXMethodDecl>(D); | |||
1742 | if (MD && requiresMemberFunctionPointerTypeMetadata(*this, MD)) { | |||
1743 | for (const CXXRecordDecl *Base : getMostBaseClasses(MD->getParent())) { | |||
1744 | llvm::Metadata *Id = | |||
1745 | CreateMetadataIdentifierForType(Context.getMemberPointerType( | |||
1746 | MD->getType(), Context.getRecordType(Base).getTypePtr())); | |||
1747 | F->addTypeMetadata(0, Id); | |||
1748 | } | |||
1749 | } | |||
1750 | } | |||
1751 | ||||
1752 | void CodeGenModule::setLLVMFunctionFEnvAttributes(const FunctionDecl *D, | |||
1753 | llvm::Function *F) { | |||
1754 | if (D->hasAttr<StrictFPAttr>()) { | |||
1755 | llvm::AttrBuilder FuncAttrs; | |||
1756 | FuncAttrs.addAttribute("strictfp"); | |||
1757 | F->addAttributes(llvm::AttributeList::FunctionIndex, FuncAttrs); | |||
1758 | } | |||
1759 | } | |||
1760 | ||||
1761 | void CodeGenModule::SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV) { | |||
1762 | const Decl *D = GD.getDecl(); | |||
1763 | if (dyn_cast_or_null<NamedDecl>(D)) | |||
1764 | setGVProperties(GV, GD); | |||
1765 | else | |||
1766 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); | |||
1767 | ||||
1768 | if (D && D->hasAttr<UsedAttr>()) | |||
1769 | addUsedGlobal(GV); | |||
1770 | ||||
1771 | if (CodeGenOpts.KeepStaticConsts && D && isa<VarDecl>(D)) { | |||
1772 | const auto *VD = cast<VarDecl>(D); | |||
1773 | if (VD->getType().isConstQualified() && | |||
1774 | VD->getStorageDuration() == SD_Static) | |||
1775 | addUsedGlobal(GV); | |||
1776 | } | |||
1777 | } | |||
1778 | ||||
1779 | bool CodeGenModule::GetCPUAndFeaturesAttributes(GlobalDecl GD, | |||
1780 | llvm::AttrBuilder &Attrs) { | |||
1781 | // Add target-cpu and target-features attributes to functions. If | |||
1782 | // we have a decl for the function and it has a target attribute then | |||
1783 | // parse that and add it to the feature set. | |||
1784 | StringRef TargetCPU = getTarget().getTargetOpts().CPU; | |||
1785 | StringRef TuneCPU = getTarget().getTargetOpts().TuneCPU; | |||
1786 | std::vector<std::string> Features; | |||
1787 | const auto *FD = dyn_cast_or_null<FunctionDecl>(GD.getDecl()); | |||
1788 | FD = FD ? FD->getMostRecentDecl() : FD; | |||
1789 | const auto *TD = FD ? FD->getAttr<TargetAttr>() : nullptr; | |||
1790 | const auto *SD = FD ? FD->getAttr<CPUSpecificAttr>() : nullptr; | |||
1791 | bool AddedAttr = false; | |||
1792 | if (TD || SD) { | |||
1793 | llvm::StringMap<bool> FeatureMap; | |||
1794 | getContext().getFunctionFeatureMap(FeatureMap, GD); | |||
1795 | ||||
1796 | // Produce the canonical string for this set of features. | |||
1797 | for (const llvm::StringMap<bool>::value_type &Entry : FeatureMap) | |||
1798 | Features.push_back((Entry.getValue() ? "+" : "-") + Entry.getKey().str()); | |||
1799 | ||||
1800 | // Now add the target-cpu and target-features to the function. | |||
1801 | // While we populated the feature map above, we still need to | |||
1802 | // get and parse the target attribute so we can get the cpu for | |||
1803 | // the function. | |||
1804 | if (TD) { | |||
1805 | ParsedTargetAttr ParsedAttr = TD->parse(); | |||
1806 | if (!ParsedAttr.Architecture.empty() && | |||
1807 | getTarget().isValidCPUName(ParsedAttr.Architecture)) { | |||
1808 | TargetCPU = ParsedAttr.Architecture; | |||
1809 | TuneCPU = ""; // Clear the tune CPU. | |||
1810 | } | |||
1811 | if (!ParsedAttr.Tune.empty() && | |||
1812 | getTarget().isValidCPUName(ParsedAttr.Tune)) | |||
1813 | TuneCPU = ParsedAttr.Tune; | |||
1814 | } | |||
1815 | } else { | |||
1816 | // Otherwise just add the existing target cpu and target features to the | |||
1817 | // function. | |||
1818 | Features = getTarget().getTargetOpts().Features; | |||
1819 | } | |||
1820 | ||||
1821 | if (!TargetCPU.empty()) { | |||
1822 | Attrs.addAttribute("target-cpu", TargetCPU); | |||
1823 | AddedAttr = true; | |||
1824 | } | |||
1825 | if (!TuneCPU.empty()) { | |||
1826 | Attrs.addAttribute("tune-cpu", TuneCPU); | |||
1827 | AddedAttr = true; | |||
1828 | } | |||
1829 | if (!Features.empty()) { | |||
1830 | llvm::sort(Features); | |||
1831 | Attrs.addAttribute("target-features", llvm::join(Features, ",")); | |||
1832 | AddedAttr = true; | |||
1833 | } | |||
1834 | ||||
1835 | return AddedAttr; | |||
1836 | } | |||
1837 | ||||
1838 | void CodeGenModule::setNonAliasAttributes(GlobalDecl GD, | |||
1839 | llvm::GlobalObject *GO) { | |||
1840 | const Decl *D = GD.getDecl(); | |||
1841 | SetCommonAttributes(GD, GO); | |||
1842 | ||||
1843 | if (D) { | |||
1844 | if (auto *GV = dyn_cast<llvm::GlobalVariable>(GO)) { | |||
1845 | if (auto *SA = D->getAttr<PragmaClangBSSSectionAttr>()) | |||
1846 | GV->addAttribute("bss-section", SA->getName()); | |||
1847 | if (auto *SA = D->getAttr<PragmaClangDataSectionAttr>()) | |||
1848 | GV->addAttribute("data-section", SA->getName()); | |||
1849 | if (auto *SA = D->getAttr<PragmaClangRodataSectionAttr>()) | |||
1850 | GV->addAttribute("rodata-section", SA->getName()); | |||
1851 | if (auto *SA = D->getAttr<PragmaClangRelroSectionAttr>()) | |||
1852 | GV->addAttribute("relro-section", SA->getName()); | |||
1853 | } | |||
1854 | ||||
1855 | if (auto *F = dyn_cast<llvm::Function>(GO)) { | |||
1856 | if (auto *SA = D->getAttr<PragmaClangTextSectionAttr>()) | |||
1857 | if (!D->getAttr<SectionAttr>()) | |||
1858 | F->addFnAttr("implicit-section-name", SA->getName()); | |||
1859 | ||||
1860 | llvm::AttrBuilder Attrs; | |||
1861 | if (GetCPUAndFeaturesAttributes(GD, Attrs)) { | |||
1862 | // We know that GetCPUAndFeaturesAttributes will always have the | |||
1863 | // newest set, since it has the newest possible FunctionDecl, so the | |||
1864 | // new ones should replace the old. | |||
1865 | llvm::AttrBuilder RemoveAttrs; | |||
1866 | RemoveAttrs.addAttribute("target-cpu"); | |||
1867 | RemoveAttrs.addAttribute("target-features"); | |||
1868 | RemoveAttrs.addAttribute("tune-cpu"); | |||
1869 | F->removeAttributes(llvm::AttributeList::FunctionIndex, RemoveAttrs); | |||
1870 | F->addAttributes(llvm::AttributeList::FunctionIndex, Attrs); | |||
1871 | } | |||
1872 | } | |||
1873 | ||||
1874 | if (const auto *CSA = D->getAttr<CodeSegAttr>()) | |||
1875 | GO->setSection(CSA->getName()); | |||
1876 | else if (const auto *SA = D->getAttr<SectionAttr>()) | |||
1877 | GO->setSection(SA->getName()); | |||
1878 | } | |||
1879 | ||||
1880 | getTargetCodeGenInfo().setTargetAttributes(D, GO, *this); | |||
1881 | } | |||
1882 | ||||
1883 | void CodeGenModule::SetInternalFunctionAttributes(GlobalDecl GD, | |||
1884 | llvm::Function *F, | |||
1885 | const CGFunctionInfo &FI) { | |||
1886 | const Decl *D = GD.getDecl(); | |||
1887 | SetLLVMFunctionAttributes(GD, FI, F); | |||
1888 | SetLLVMFunctionAttributesForDefinition(D, F); | |||
1889 | ||||
1890 | F->setLinkage(llvm::Function::InternalLinkage); | |||
1891 | ||||
1892 | setNonAliasAttributes(GD, F); | |||
1893 | } | |||
1894 | ||||
1895 | static void setLinkageForGV(llvm::GlobalValue *GV, const NamedDecl *ND) { | |||
1896 | // Set linkage and visibility in case we never see a definition. | |||
1897 | LinkageInfo LV = ND->getLinkageAndVisibility(); | |||
1898 | // Don't set internal linkage on declarations. | |||
1899 | // "extern_weak" is overloaded in LLVM; we probably should have | |||
1900 | // separate linkage types for this. | |||
1901 | if (isExternallyVisible(LV.getLinkage()) && | |||
1902 | (ND->hasAttr<WeakAttr>() || ND->isWeakImported())) | |||
1903 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); | |||
1904 | } | |||
1905 | ||||
1906 | void CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD, | |||
1907 | llvm::Function *F) { | |||
1908 | // Only if we are checking indirect calls. | |||
1909 | if (!LangOpts.Sanitize.has(SanitizerKind::CFIICall)) | |||
1910 | return; | |||
1911 | ||||
1912 | // Non-static class methods are handled via vtable or member function pointer | |||
1913 | // checks elsewhere. | |||
1914 | if (isa<CXXMethodDecl>(FD) && !cast<CXXMethodDecl>(FD)->isStatic()) | |||
1915 | return; | |||
1916 | ||||
1917 | llvm::Metadata *MD = CreateMetadataIdentifierForType(FD->getType()); | |||
1918 | F->addTypeMetadata(0, MD); | |||
1919 | F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType())); | |||
1920 | ||||
1921 | // Emit a hash-based bit set entry for cross-DSO calls. | |||
1922 | if (CodeGenOpts.SanitizeCfiCrossDso) | |||
1923 | if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD)) | |||
1924 | F->addTypeMetadata(0, llvm::ConstantAsMetadata::get(CrossDsoTypeId)); | |||
1925 | } | |||
1926 | ||||
1927 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, llvm::Function *F, | |||
1928 | bool IsIncompleteFunction, | |||
1929 | bool IsThunk) { | |||
1930 | ||||
1931 | if (llvm::Intrinsic::ID IID = F->getIntrinsicID()) { | |||
1932 | // If this is an intrinsic function, set the function's attributes | |||
1933 | // to the intrinsic's attributes. | |||
1934 | F->setAttributes(llvm::Intrinsic::getAttributes(getLLVMContext(), IID)); | |||
1935 | return; | |||
1936 | } | |||
1937 | ||||
1938 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
1939 | ||||
1940 | if (!IsIncompleteFunction) | |||
1941 | SetLLVMFunctionAttributes(GD, getTypes().arrangeGlobalDeclaration(GD), F); | |||
1942 | ||||
1943 | // Add the Returned attribute for "this", except for iOS 5 and earlier | |||
1944 | // where substantial code, including the libstdc++ dylib, was compiled with | |||
1945 | // GCC and does not actually return "this". | |||
1946 | if (!IsThunk && getCXXABI().HasThisReturn(GD) && | |||
1947 | !(getTriple().isiOS() && getTriple().isOSVersionLT(6))) { | |||
1948 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1951, __PRETTY_FUNCTION__)) | |||
1949 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1951, __PRETTY_FUNCTION__)) | |||
1950 | ->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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1951, __PRETTY_FUNCTION__)) | |||
1951 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1951, __PRETTY_FUNCTION__)); | |||
1952 | F->addAttribute(1, llvm::Attribute::Returned); | |||
1953 | } | |||
1954 | ||||
1955 | // Only a few attributes are set on declarations; these may later be | |||
1956 | // overridden by a definition. | |||
1957 | ||||
1958 | setLinkageForGV(F, FD); | |||
1959 | setGVProperties(F, FD); | |||
1960 | ||||
1961 | // Setup target-specific attributes. | |||
1962 | if (!IsIncompleteFunction && F->isDeclaration()) | |||
1963 | getTargetCodeGenInfo().setTargetAttributes(FD, F, *this); | |||
1964 | ||||
1965 | if (const auto *CSA = FD->getAttr<CodeSegAttr>()) | |||
1966 | F->setSection(CSA->getName()); | |||
1967 | else if (const auto *SA = FD->getAttr<SectionAttr>()) | |||
1968 | F->setSection(SA->getName()); | |||
1969 | ||||
1970 | // If we plan on emitting this inline builtin, we can't treat it as a builtin. | |||
1971 | if (FD->isInlineBuiltinDeclaration()) { | |||
1972 | const FunctionDecl *FDBody; | |||
1973 | bool HasBody = FD->hasBody(FDBody); | |||
1974 | (void)HasBody; | |||
1975 | assert(HasBody && "Inline builtin declarations should always have an "((HasBody && "Inline builtin declarations should always have an " "available body!") ? static_cast<void> (0) : __assert_fail ("HasBody && \"Inline builtin declarations should always have an \" \"available body!\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1976, __PRETTY_FUNCTION__)) | |||
1976 | "available body!")((HasBody && "Inline builtin declarations should always have an " "available body!") ? static_cast<void> (0) : __assert_fail ("HasBody && \"Inline builtin declarations should always have an \" \"available body!\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 1976, __PRETTY_FUNCTION__)); | |||
1977 | if (shouldEmitFunction(FDBody)) | |||
1978 | F->addAttribute(llvm::AttributeList::FunctionIndex, | |||
1979 | llvm::Attribute::NoBuiltin); | |||
1980 | } | |||
1981 | ||||
1982 | if (FD->isReplaceableGlobalAllocationFunction()) { | |||
1983 | // A replaceable global allocation function does not act like a builtin by | |||
1984 | // default, only if it is invoked by a new-expression or delete-expression. | |||
1985 | F->addAttribute(llvm::AttributeList::FunctionIndex, | |||
1986 | llvm::Attribute::NoBuiltin); | |||
1987 | } | |||
1988 | ||||
1989 | if (isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD)) | |||
1990 | F->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
1991 | else if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) | |||
1992 | if (MD->isVirtual()) | |||
1993 | F->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
1994 | ||||
1995 | // Don't emit entries for function declarations in the cross-DSO mode. This | |||
1996 | // is handled with better precision by the receiving DSO. But if jump tables | |||
1997 | // are non-canonical then we need type metadata in order to produce the local | |||
1998 | // jump table. | |||
1999 | if (!CodeGenOpts.SanitizeCfiCrossDso || | |||
2000 | !CodeGenOpts.SanitizeCfiCanonicalJumpTables) | |||
2001 | CreateFunctionTypeMetadataForIcall(FD, F); | |||
2002 | ||||
2003 | if (getLangOpts().OpenMP && FD->hasAttr<OMPDeclareSimdDeclAttr>()) | |||
2004 | getOpenMPRuntime().emitDeclareSimdFunction(FD, F); | |||
2005 | ||||
2006 | if (const auto *CB = FD->getAttr<CallbackAttr>()) { | |||
2007 | // Annotate the callback behavior as metadata: | |||
2008 | // - The callback callee (as argument number). | |||
2009 | // - The callback payloads (as argument numbers). | |||
2010 | llvm::LLVMContext &Ctx = F->getContext(); | |||
2011 | llvm::MDBuilder MDB(Ctx); | |||
2012 | ||||
2013 | // The payload indices are all but the first one in the encoding. The first | |||
2014 | // identifies the callback callee. | |||
2015 | int CalleeIdx = *CB->encoding_begin(); | |||
2016 | ArrayRef<int> PayloadIndices(CB->encoding_begin() + 1, CB->encoding_end()); | |||
2017 | F->addMetadata(llvm::LLVMContext::MD_callback, | |||
2018 | *llvm::MDNode::get(Ctx, {MDB.createCallbackEncoding( | |||
2019 | CalleeIdx, PayloadIndices, | |||
2020 | /* VarArgsArePassed */ false)})); | |||
2021 | } | |||
2022 | } | |||
2023 | ||||
2024 | void CodeGenModule::addUsedGlobal(llvm::GlobalValue *GV) { | |||
2025 | assert((isa<llvm::Function>(GV) || !GV->isDeclaration()) &&(((isa<llvm::Function>(GV) || !GV->isDeclaration()) && "Only globals with definition can force usage.") ? static_cast <void> (0) : __assert_fail ("(isa<llvm::Function>(GV) || !GV->isDeclaration()) && \"Only globals with definition can force usage.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2026, __PRETTY_FUNCTION__)) | |||
2026 | "Only globals with definition can force usage.")(((isa<llvm::Function>(GV) || !GV->isDeclaration()) && "Only globals with definition can force usage.") ? static_cast <void> (0) : __assert_fail ("(isa<llvm::Function>(GV) || !GV->isDeclaration()) && \"Only globals with definition can force usage.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2026, __PRETTY_FUNCTION__)); | |||
2027 | LLVMUsed.emplace_back(GV); | |||
2028 | } | |||
2029 | ||||
2030 | void CodeGenModule::addCompilerUsedGlobal(llvm::GlobalValue *GV) { | |||
2031 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2032, __PRETTY_FUNCTION__)) | |||
2032 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2032, __PRETTY_FUNCTION__)); | |||
2033 | LLVMCompilerUsed.emplace_back(GV); | |||
2034 | } | |||
2035 | ||||
2036 | static void emitUsed(CodeGenModule &CGM, StringRef Name, | |||
2037 | std::vector<llvm::WeakTrackingVH> &List) { | |||
2038 | // Don't create llvm.used if there is no need. | |||
2039 | if (List.empty()) | |||
2040 | return; | |||
2041 | ||||
2042 | // Convert List to what ConstantArray needs. | |||
2043 | SmallVector<llvm::Constant*, 8> UsedArray; | |||
2044 | UsedArray.resize(List.size()); | |||
2045 | for (unsigned i = 0, e = List.size(); i != e; ++i) { | |||
2046 | UsedArray[i] = | |||
2047 | llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
2048 | cast<llvm::Constant>(&*List[i]), CGM.Int8PtrTy); | |||
2049 | } | |||
2050 | ||||
2051 | if (UsedArray.empty()) | |||
2052 | return; | |||
2053 | llvm::ArrayType *ATy = llvm::ArrayType::get(CGM.Int8PtrTy, UsedArray.size()); | |||
2054 | ||||
2055 | auto *GV = new llvm::GlobalVariable( | |||
2056 | CGM.getModule(), ATy, false, llvm::GlobalValue::AppendingLinkage, | |||
2057 | llvm::ConstantArray::get(ATy, UsedArray), Name); | |||
2058 | ||||
2059 | GV->setSection("llvm.metadata"); | |||
2060 | } | |||
2061 | ||||
2062 | void CodeGenModule::emitLLVMUsed() { | |||
2063 | emitUsed(*this, "llvm.used", LLVMUsed); | |||
2064 | emitUsed(*this, "llvm.compiler.used", LLVMCompilerUsed); | |||
2065 | } | |||
2066 | ||||
2067 | void CodeGenModule::AppendLinkerOptions(StringRef Opts) { | |||
2068 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opts); | |||
2069 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); | |||
2070 | } | |||
2071 | ||||
2072 | void CodeGenModule::AddDetectMismatch(StringRef Name, StringRef Value) { | |||
2073 | llvm::SmallString<32> Opt; | |||
2074 | getTargetCodeGenInfo().getDetectMismatchOption(Name, Value, Opt); | |||
2075 | if (Opt.empty()) | |||
2076 | return; | |||
2077 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); | |||
2078 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); | |||
2079 | } | |||
2080 | ||||
2081 | void CodeGenModule::AddDependentLib(StringRef Lib) { | |||
2082 | auto &C = getLLVMContext(); | |||
2083 | if (getTarget().getTriple().isOSBinFormatELF()) { | |||
2084 | ELFDependentLibraries.push_back( | |||
2085 | llvm::MDNode::get(C, llvm::MDString::get(C, Lib))); | |||
2086 | return; | |||
2087 | } | |||
2088 | ||||
2089 | llvm::SmallString<24> Opt; | |||
2090 | getTargetCodeGenInfo().getDependentLibraryOption(Lib, Opt); | |||
2091 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); | |||
2092 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(C, MDOpts)); | |||
2093 | } | |||
2094 | ||||
2095 | /// Add link options implied by the given module, including modules | |||
2096 | /// it depends on, using a postorder walk. | |||
2097 | static void addLinkOptionsPostorder(CodeGenModule &CGM, Module *Mod, | |||
2098 | SmallVectorImpl<llvm::MDNode *> &Metadata, | |||
2099 | llvm::SmallPtrSet<Module *, 16> &Visited) { | |||
2100 | // Import this module's parent. | |||
2101 | if (Mod->Parent && Visited.insert(Mod->Parent).second) { | |||
2102 | addLinkOptionsPostorder(CGM, Mod->Parent, Metadata, Visited); | |||
2103 | } | |||
2104 | ||||
2105 | // Import this module's dependencies. | |||
2106 | for (unsigned I = Mod->Imports.size(); I > 0; --I) { | |||
2107 | if (Visited.insert(Mod->Imports[I - 1]).second) | |||
2108 | addLinkOptionsPostorder(CGM, Mod->Imports[I-1], Metadata, Visited); | |||
2109 | } | |||
2110 | ||||
2111 | // Add linker options to link against the libraries/frameworks | |||
2112 | // described by this module. | |||
2113 | llvm::LLVMContext &Context = CGM.getLLVMContext(); | |||
2114 | bool IsELF = CGM.getTarget().getTriple().isOSBinFormatELF(); | |||
2115 | ||||
2116 | // For modules that use export_as for linking, use that module | |||
2117 | // name instead. | |||
2118 | if (Mod->UseExportAsModuleLinkName) | |||
2119 | return; | |||
2120 | ||||
2121 | for (unsigned I = Mod->LinkLibraries.size(); I > 0; --I) { | |||
2122 | // Link against a framework. Frameworks are currently Darwin only, so we | |||
2123 | // don't to ask TargetCodeGenInfo for the spelling of the linker option. | |||
2124 | if (Mod->LinkLibraries[I-1].IsFramework) { | |||
2125 | llvm::Metadata *Args[2] = { | |||
2126 | llvm::MDString::get(Context, "-framework"), | |||
2127 | llvm::MDString::get(Context, Mod->LinkLibraries[I - 1].Library)}; | |||
2128 | ||||
2129 | Metadata.push_back(llvm::MDNode::get(Context, Args)); | |||
2130 | continue; | |||
2131 | } | |||
2132 | ||||
2133 | // Link against a library. | |||
2134 | if (IsELF) { | |||
2135 | llvm::Metadata *Args[2] = { | |||
2136 | llvm::MDString::get(Context, "lib"), | |||
2137 | llvm::MDString::get(Context, Mod->LinkLibraries[I - 1].Library), | |||
2138 | }; | |||
2139 | Metadata.push_back(llvm::MDNode::get(Context, Args)); | |||
2140 | } else { | |||
2141 | llvm::SmallString<24> Opt; | |||
2142 | CGM.getTargetCodeGenInfo().getDependentLibraryOption( | |||
2143 | Mod->LinkLibraries[I - 1].Library, Opt); | |||
2144 | auto *OptString = llvm::MDString::get(Context, Opt); | |||
2145 | Metadata.push_back(llvm::MDNode::get(Context, OptString)); | |||
2146 | } | |||
2147 | } | |||
2148 | } | |||
2149 | ||||
2150 | void CodeGenModule::EmitModuleLinkOptions() { | |||
2151 | // Collect the set of all of the modules we want to visit to emit link | |||
2152 | // options, which is essentially the imported modules and all of their | |||
2153 | // non-explicit child modules. | |||
2154 | llvm::SetVector<clang::Module *> LinkModules; | |||
2155 | llvm::SmallPtrSet<clang::Module *, 16> Visited; | |||
2156 | SmallVector<clang::Module *, 16> Stack; | |||
2157 | ||||
2158 | // Seed the stack with imported modules. | |||
2159 | for (Module *M : ImportedModules) { | |||
2160 | // Do not add any link flags when an implementation TU of a module imports | |||
2161 | // a header of that same module. | |||
2162 | if (M->getTopLevelModuleName() == getLangOpts().CurrentModule && | |||
2163 | !getLangOpts().isCompilingModule()) | |||
2164 | continue; | |||
2165 | if (Visited.insert(M).second) | |||
2166 | Stack.push_back(M); | |||
2167 | } | |||
2168 | ||||
2169 | // Find all of the modules to import, making a little effort to prune | |||
2170 | // non-leaf modules. | |||
2171 | while (!Stack.empty()) { | |||
2172 | clang::Module *Mod = Stack.pop_back_val(); | |||
2173 | ||||
2174 | bool AnyChildren = false; | |||
2175 | ||||
2176 | // Visit the submodules of this module. | |||
2177 | for (const auto &SM : Mod->submodules()) { | |||
2178 | // Skip explicit children; they need to be explicitly imported to be | |||
2179 | // linked against. | |||
2180 | if (SM->IsExplicit) | |||
2181 | continue; | |||
2182 | ||||
2183 | if (Visited.insert(SM).second) { | |||
2184 | Stack.push_back(SM); | |||
2185 | AnyChildren = true; | |||
2186 | } | |||
2187 | } | |||
2188 | ||||
2189 | // We didn't find any children, so add this module to the list of | |||
2190 | // modules to link against. | |||
2191 | if (!AnyChildren) { | |||
2192 | LinkModules.insert(Mod); | |||
2193 | } | |||
2194 | } | |||
2195 | ||||
2196 | // Add link options for all of the imported modules in reverse topological | |||
2197 | // order. We don't do anything to try to order import link flags with respect | |||
2198 | // to linker options inserted by things like #pragma comment(). | |||
2199 | SmallVector<llvm::MDNode *, 16> MetadataArgs; | |||
2200 | Visited.clear(); | |||
2201 | for (Module *M : LinkModules) | |||
2202 | if (Visited.insert(M).second) | |||
2203 | addLinkOptionsPostorder(*this, M, MetadataArgs, Visited); | |||
2204 | std::reverse(MetadataArgs.begin(), MetadataArgs.end()); | |||
2205 | LinkerOptionsMetadata.append(MetadataArgs.begin(), MetadataArgs.end()); | |||
2206 | ||||
2207 | // Add the linker options metadata flag. | |||
2208 | auto *NMD = getModule().getOrInsertNamedMetadata("llvm.linker.options"); | |||
2209 | for (auto *MD : LinkerOptionsMetadata) | |||
2210 | NMD->addOperand(MD); | |||
2211 | } | |||
2212 | ||||
2213 | void CodeGenModule::EmitDeferred() { | |||
2214 | // Emit deferred declare target declarations. | |||
2215 | if (getLangOpts().OpenMP && !getLangOpts().OpenMPSimd) | |||
2216 | getOpenMPRuntime().emitDeferredTargetDecls(); | |||
2217 | ||||
2218 | // Emit code for any potentially referenced deferred decls. Since a | |||
2219 | // previously unused static decl may become used during the generation of code | |||
2220 | // for a static function, iterate until no changes are made. | |||
2221 | ||||
2222 | if (!DeferredVTables.empty()) { | |||
2223 | EmitDeferredVTables(); | |||
2224 | ||||
2225 | // Emitting a vtable doesn't directly cause more vtables to | |||
2226 | // become deferred, although it can cause functions to be | |||
2227 | // emitted that then need those vtables. | |||
2228 | assert(DeferredVTables.empty())((DeferredVTables.empty()) ? static_cast<void> (0) : __assert_fail ("DeferredVTables.empty()", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2228, __PRETTY_FUNCTION__)); | |||
2229 | } | |||
2230 | ||||
2231 | // Emit CUDA/HIP static device variables referenced by host code only. | |||
2232 | if (getLangOpts().CUDA) | |||
2233 | for (auto V : getContext().CUDAStaticDeviceVarReferencedByHost) | |||
2234 | DeferredDeclsToEmit.push_back(V); | |||
2235 | ||||
2236 | // Stop if we're out of both deferred vtables and deferred declarations. | |||
2237 | if (DeferredDeclsToEmit.empty()) | |||
2238 | return; | |||
2239 | ||||
2240 | // Grab the list of decls to emit. If EmitGlobalDefinition schedules more | |||
2241 | // work, it will not interfere with this. | |||
2242 | std::vector<GlobalDecl> CurDeclsToEmit; | |||
2243 | CurDeclsToEmit.swap(DeferredDeclsToEmit); | |||
2244 | ||||
2245 | for (GlobalDecl &D : CurDeclsToEmit) { | |||
2246 | // We should call GetAddrOfGlobal with IsForDefinition set to true in order | |||
2247 | // to get GlobalValue with exactly the type we need, not something that | |||
2248 | // might had been created for another decl with the same mangled name but | |||
2249 | // different type. | |||
2250 | llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>( | |||
2251 | GetAddrOfGlobal(D, ForDefinition)); | |||
2252 | ||||
2253 | // In case of different address spaces, we may still get a cast, even with | |||
2254 | // IsForDefinition equal to true. Query mangled names table to get | |||
2255 | // GlobalValue. | |||
2256 | if (!GV) | |||
2257 | GV = GetGlobalValue(getMangledName(D)); | |||
2258 | ||||
2259 | // Make sure GetGlobalValue returned non-null. | |||
2260 | assert(GV)((GV) ? static_cast<void> (0) : __assert_fail ("GV", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2260, __PRETTY_FUNCTION__)); | |||
2261 | ||||
2262 | // Check to see if we've already emitted this. This is necessary | |||
2263 | // for a couple of reasons: first, decls can end up in the | |||
2264 | // deferred-decls queue multiple times, and second, decls can end | |||
2265 | // up with definitions in unusual ways (e.g. by an extern inline | |||
2266 | // function acquiring a strong function redefinition). Just | |||
2267 | // ignore these cases. | |||
2268 | if (!GV->isDeclaration()) | |||
2269 | continue; | |||
2270 | ||||
2271 | // If this is OpenMP, check if it is legal to emit this global normally. | |||
2272 | if (LangOpts.OpenMP && OpenMPRuntime && OpenMPRuntime->emitTargetGlobal(D)) | |||
2273 | continue; | |||
2274 | ||||
2275 | // Otherwise, emit the definition and move on to the next one. | |||
2276 | EmitGlobalDefinition(D, GV); | |||
2277 | ||||
2278 | // If we found out that we need to emit more decls, do that recursively. | |||
2279 | // This has the advantage that the decls are emitted in a DFS and related | |||
2280 | // ones are close together, which is convenient for testing. | |||
2281 | if (!DeferredVTables.empty() || !DeferredDeclsToEmit.empty()) { | |||
2282 | EmitDeferred(); | |||
2283 | assert(DeferredVTables.empty() && DeferredDeclsToEmit.empty())((DeferredVTables.empty() && DeferredDeclsToEmit.empty ()) ? static_cast<void> (0) : __assert_fail ("DeferredVTables.empty() && DeferredDeclsToEmit.empty()" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2283, __PRETTY_FUNCTION__)); | |||
2284 | } | |||
2285 | } | |||
2286 | } | |||
2287 | ||||
2288 | void CodeGenModule::EmitVTablesOpportunistically() { | |||
2289 | // Try to emit external vtables as available_externally if they have emitted | |||
2290 | // all inlined virtual functions. It runs after EmitDeferred() and therefore | |||
2291 | // is not allowed to create new references to things that need to be emitted | |||
2292 | // lazily. Note that it also uses fact that we eagerly emitting RTTI. | |||
2293 | ||||
2294 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2295, __PRETTY_FUNCTION__)) | |||
2295 | && "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2295, __PRETTY_FUNCTION__)); | |||
2296 | ||||
2297 | for (const CXXRecordDecl *RD : OpportunisticVTables) { | |||
2298 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2299, __PRETTY_FUNCTION__)) | |||
2299 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2299, __PRETTY_FUNCTION__)); | |||
2300 | if (getCXXABI().canSpeculativelyEmitVTable(RD)) | |||
2301 | VTables.GenerateClassData(RD); | |||
2302 | } | |||
2303 | OpportunisticVTables.clear(); | |||
2304 | } | |||
2305 | ||||
2306 | void CodeGenModule::EmitGlobalAnnotations() { | |||
2307 | if (Annotations.empty()) | |||
2308 | return; | |||
2309 | ||||
2310 | // Create a new global variable for the ConstantStruct in the Module. | |||
2311 | llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( | |||
2312 | Annotations[0]->getType(), Annotations.size()), Annotations); | |||
2313 | auto *gv = new llvm::GlobalVariable(getModule(), Array->getType(), false, | |||
2314 | llvm::GlobalValue::AppendingLinkage, | |||
2315 | Array, "llvm.global.annotations"); | |||
2316 | gv->setSection(AnnotationSection); | |||
2317 | } | |||
2318 | ||||
2319 | llvm::Constant *CodeGenModule::EmitAnnotationString(StringRef Str) { | |||
2320 | llvm::Constant *&AStr = AnnotationStrings[Str]; | |||
2321 | if (AStr) | |||
2322 | return AStr; | |||
2323 | ||||
2324 | // Not found yet, create a new global. | |||
2325 | llvm::Constant *s = llvm::ConstantDataArray::getString(getLLVMContext(), Str); | |||
2326 | auto *gv = | |||
2327 | new llvm::GlobalVariable(getModule(), s->getType(), true, | |||
2328 | llvm::GlobalValue::PrivateLinkage, s, ".str"); | |||
2329 | gv->setSection(AnnotationSection); | |||
2330 | gv->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2331 | AStr = gv; | |||
2332 | return gv; | |||
2333 | } | |||
2334 | ||||
2335 | llvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { | |||
2336 | SourceManager &SM = getContext().getSourceManager(); | |||
2337 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); | |||
2338 | if (PLoc.isValid()) | |||
2339 | return EmitAnnotationString(PLoc.getFilename()); | |||
2340 | return EmitAnnotationString(SM.getBufferName(Loc)); | |||
2341 | } | |||
2342 | ||||
2343 | llvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { | |||
2344 | SourceManager &SM = getContext().getSourceManager(); | |||
2345 | PresumedLoc PLoc = SM.getPresumedLoc(L); | |||
2346 | unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : | |||
2347 | SM.getExpansionLineNumber(L); | |||
2348 | return llvm::ConstantInt::get(Int32Ty, LineNo); | |||
2349 | } | |||
2350 | ||||
2351 | llvm::Constant *CodeGenModule::EmitAnnotationArgs(const AnnotateAttr *Attr) { | |||
2352 | ArrayRef<Expr *> Exprs = {Attr->args_begin(), Attr->args_size()}; | |||
2353 | Exprs = Exprs.drop_front(); | |||
2354 | if (Exprs.empty()) | |||
2355 | return llvm::ConstantPointerNull::get(Int8PtrTy); | |||
2356 | ||||
2357 | llvm::FoldingSetNodeID ID; | |||
2358 | for (Expr *E : Exprs) { | |||
2359 | ID.Add(cast<clang::ConstantExpr>(E)->getAPValueResult()); | |||
2360 | } | |||
2361 | llvm::Constant *&Lookup = AnnotationArgs[ID.ComputeHash()]; | |||
2362 | if (Lookup) | |||
2363 | return Lookup; | |||
2364 | ||||
2365 | llvm::SmallVector<llvm::Constant *, 4> LLVMArgs; | |||
2366 | LLVMArgs.reserve(Exprs.size()); | |||
2367 | ConstantEmitter ConstEmiter(*this); | |||
2368 | llvm::transform(Exprs, std::back_inserter(LLVMArgs), [&](const Expr *E) { | |||
2369 | const auto *CE = cast<clang::ConstantExpr>(E); | |||
2370 | return ConstEmiter.emitAbstract(CE->getBeginLoc(), CE->getAPValueResult(), | |||
2371 | CE->getType()); | |||
2372 | }); | |||
2373 | auto *Struct = llvm::ConstantStruct::getAnon(LLVMArgs); | |||
2374 | auto *GV = new llvm::GlobalVariable(getModule(), Struct->getType(), true, | |||
2375 | llvm::GlobalValue::PrivateLinkage, Struct, | |||
2376 | ".args"); | |||
2377 | GV->setSection(AnnotationSection); | |||
2378 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2379 | auto *Bitcasted = llvm::ConstantExpr::getBitCast(GV, Int8PtrTy); | |||
2380 | ||||
2381 | Lookup = Bitcasted; | |||
2382 | return Bitcasted; | |||
2383 | } | |||
2384 | ||||
2385 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, | |||
2386 | const AnnotateAttr *AA, | |||
2387 | SourceLocation L) { | |||
2388 | // Get the globals for file name, annotation, and the line number. | |||
2389 | llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), | |||
2390 | *UnitGV = EmitAnnotationUnit(L), | |||
2391 | *LineNoCst = EmitAnnotationLineNo(L), | |||
2392 | *Args = EmitAnnotationArgs(AA); | |||
2393 | ||||
2394 | llvm::Constant *ASZeroGV = GV; | |||
2395 | if (GV->getAddressSpace() != 0) { | |||
2396 | ASZeroGV = llvm::ConstantExpr::getAddrSpaceCast( | |||
2397 | GV, GV->getValueType()->getPointerTo(0)); | |||
2398 | } | |||
2399 | ||||
2400 | // Create the ConstantStruct for the global annotation. | |||
2401 | llvm::Constant *Fields[] = { | |||
2402 | llvm::ConstantExpr::getBitCast(ASZeroGV, Int8PtrTy), | |||
2403 | llvm::ConstantExpr::getBitCast(AnnoGV, Int8PtrTy), | |||
2404 | llvm::ConstantExpr::getBitCast(UnitGV, Int8PtrTy), | |||
2405 | LineNoCst, | |||
2406 | Args, | |||
2407 | }; | |||
2408 | return llvm::ConstantStruct::getAnon(Fields); | |||
2409 | } | |||
2410 | ||||
2411 | void CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, | |||
2412 | llvm::GlobalValue *GV) { | |||
2413 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2413, __PRETTY_FUNCTION__)); | |||
2414 | // Get the struct elements for these annotations. | |||
2415 | for (const auto *I : D->specific_attrs<AnnotateAttr>()) | |||
2416 | Annotations.push_back(EmitAnnotateAttr(GV, I, D->getLocation())); | |||
2417 | } | |||
2418 | ||||
2419 | bool CodeGenModule::isInSanitizerBlacklist(SanitizerMask Kind, | |||
2420 | llvm::Function *Fn, | |||
2421 | SourceLocation Loc) const { | |||
2422 | const auto &SanitizerBL = getContext().getSanitizerBlacklist(); | |||
2423 | // Blacklist by function name. | |||
2424 | if (SanitizerBL.isBlacklistedFunction(Kind, Fn->getName())) | |||
2425 | return true; | |||
2426 | // Blacklist by location. | |||
2427 | if (Loc.isValid()) | |||
2428 | return SanitizerBL.isBlacklistedLocation(Kind, Loc); | |||
2429 | // If location is unknown, this may be a compiler-generated function. Assume | |||
2430 | // it's located in the main file. | |||
2431 | auto &SM = Context.getSourceManager(); | |||
2432 | if (const auto *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { | |||
2433 | return SanitizerBL.isBlacklistedFile(Kind, MainFile->getName()); | |||
2434 | } | |||
2435 | return false; | |||
2436 | } | |||
2437 | ||||
2438 | bool CodeGenModule::isInSanitizerBlacklist(llvm::GlobalVariable *GV, | |||
2439 | SourceLocation Loc, QualType Ty, | |||
2440 | StringRef Category) const { | |||
2441 | // For now globals can be blacklisted only in ASan and KASan. | |||
2442 | const SanitizerMask EnabledAsanMask = | |||
2443 | LangOpts.Sanitize.Mask & | |||
2444 | (SanitizerKind::Address | SanitizerKind::KernelAddress | | |||
2445 | SanitizerKind::HWAddress | SanitizerKind::KernelHWAddress | | |||
2446 | SanitizerKind::MemTag); | |||
2447 | if (!EnabledAsanMask) | |||
2448 | return false; | |||
2449 | const auto &SanitizerBL = getContext().getSanitizerBlacklist(); | |||
2450 | if (SanitizerBL.isBlacklistedGlobal(EnabledAsanMask, GV->getName(), Category)) | |||
2451 | return true; | |||
2452 | if (SanitizerBL.isBlacklistedLocation(EnabledAsanMask, Loc, Category)) | |||
2453 | return true; | |||
2454 | // Check global type. | |||
2455 | if (!Ty.isNull()) { | |||
2456 | // Drill down the array types: if global variable of a fixed type is | |||
2457 | // blacklisted, we also don't instrument arrays of them. | |||
2458 | while (auto AT = dyn_cast<ArrayType>(Ty.getTypePtr())) | |||
2459 | Ty = AT->getElementType(); | |||
2460 | Ty = Ty.getCanonicalType().getUnqualifiedType(); | |||
2461 | // We allow to blacklist only record types (classes, structs etc.) | |||
2462 | if (Ty->isRecordType()) { | |||
2463 | std::string TypeStr = Ty.getAsString(getContext().getPrintingPolicy()); | |||
2464 | if (SanitizerBL.isBlacklistedType(EnabledAsanMask, TypeStr, Category)) | |||
2465 | return true; | |||
2466 | } | |||
2467 | } | |||
2468 | return false; | |||
2469 | } | |||
2470 | ||||
2471 | bool CodeGenModule::imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, | |||
2472 | StringRef Category) const { | |||
2473 | const auto &XRayFilter = getContext().getXRayFilter(); | |||
2474 | using ImbueAttr = XRayFunctionFilter::ImbueAttribute; | |||
2475 | auto Attr = ImbueAttr::NONE; | |||
2476 | if (Loc.isValid()) | |||
2477 | Attr = XRayFilter.shouldImbueLocation(Loc, Category); | |||
2478 | if (Attr == ImbueAttr::NONE) | |||
2479 | Attr = XRayFilter.shouldImbueFunction(Fn->getName()); | |||
2480 | switch (Attr) { | |||
2481 | case ImbueAttr::NONE: | |||
2482 | return false; | |||
2483 | case ImbueAttr::ALWAYS: | |||
2484 | Fn->addFnAttr("function-instrument", "xray-always"); | |||
2485 | break; | |||
2486 | case ImbueAttr::ALWAYS_ARG1: | |||
2487 | Fn->addFnAttr("function-instrument", "xray-always"); | |||
2488 | Fn->addFnAttr("xray-log-args", "1"); | |||
2489 | break; | |||
2490 | case ImbueAttr::NEVER: | |||
2491 | Fn->addFnAttr("function-instrument", "xray-never"); | |||
2492 | break; | |||
2493 | } | |||
2494 | return true; | |||
2495 | } | |||
2496 | ||||
2497 | bool CodeGenModule::MustBeEmitted(const ValueDecl *Global) { | |||
2498 | // Never defer when EmitAllDecls is specified. | |||
2499 | if (LangOpts.EmitAllDecls) | |||
2500 | return true; | |||
2501 | ||||
2502 | if (CodeGenOpts.KeepStaticConsts) { | |||
2503 | const auto *VD = dyn_cast<VarDecl>(Global); | |||
2504 | if (VD && VD->getType().isConstQualified() && | |||
2505 | VD->getStorageDuration() == SD_Static) | |||
2506 | return true; | |||
2507 | } | |||
2508 | ||||
2509 | return getContext().DeclMustBeEmitted(Global); | |||
2510 | } | |||
2511 | ||||
2512 | bool CodeGenModule::MayBeEmittedEagerly(const ValueDecl *Global) { | |||
2513 | if (const auto *FD = dyn_cast<FunctionDecl>(Global)) { | |||
2514 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | |||
2515 | // Implicit template instantiations may change linkage if they are later | |||
2516 | // explicitly instantiated, so they should not be emitted eagerly. | |||
2517 | return false; | |||
2518 | // In OpenMP 5.0 function may be marked as device_type(nohost) and we should | |||
2519 | // not emit them eagerly unless we sure that the function must be emitted on | |||
2520 | // the host. | |||
2521 | if (LangOpts.OpenMP >= 50 && !LangOpts.OpenMPSimd && | |||
2522 | !LangOpts.OpenMPIsDevice && | |||
2523 | !OMPDeclareTargetDeclAttr::getDeviceType(FD) && | |||
2524 | !FD->isUsed(/*CheckUsedAttr=*/false) && !FD->isReferenced()) | |||
2525 | return false; | |||
2526 | } | |||
2527 | if (const auto *VD = dyn_cast<VarDecl>(Global)) | |||
2528 | if (Context.getInlineVariableDefinitionKind(VD) == | |||
2529 | ASTContext::InlineVariableDefinitionKind::WeakUnknown) | |||
2530 | // A definition of an inline constexpr static data member may change | |||
2531 | // linkage later if it's redeclared outside the class. | |||
2532 | return false; | |||
2533 | // If OpenMP is enabled and threadprivates must be generated like TLS, delay | |||
2534 | // codegen for global variables, because they may be marked as threadprivate. | |||
2535 | if (LangOpts.OpenMP && LangOpts.OpenMPUseTLS && | |||
2536 | getContext().getTargetInfo().isTLSSupported() && isa<VarDecl>(Global) && | |||
2537 | !isTypeConstant(Global->getType(), false) && | |||
2538 | !OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Global)) | |||
2539 | return false; | |||
2540 | ||||
2541 | return true; | |||
2542 | } | |||
2543 | ||||
2544 | ConstantAddress CodeGenModule::GetAddrOfMSGuidDecl(const MSGuidDecl *GD) { | |||
2545 | StringRef Name = getMangledName(GD); | |||
2546 | ||||
2547 | // The UUID descriptor should be pointer aligned. | |||
2548 | CharUnits Alignment = CharUnits::fromQuantity(PointerAlignInBytes); | |||
2549 | ||||
2550 | // Look for an existing global. | |||
2551 | if (llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name)) | |||
2552 | return ConstantAddress(GV, Alignment); | |||
2553 | ||||
2554 | ConstantEmitter Emitter(*this); | |||
2555 | llvm::Constant *Init; | |||
2556 | ||||
2557 | APValue &V = GD->getAsAPValue(); | |||
2558 | if (!V.isAbsent()) { | |||
2559 | // If possible, emit the APValue version of the initializer. In particular, | |||
2560 | // this gets the type of the constant right. | |||
2561 | Init = Emitter.emitForInitializer( | |||
2562 | GD->getAsAPValue(), GD->getType().getAddressSpace(), GD->getType()); | |||
2563 | } else { | |||
2564 | // As a fallback, directly construct the constant. | |||
2565 | // FIXME: This may get padding wrong under esoteric struct layout rules. | |||
2566 | // MSVC appears to create a complete type 'struct __s_GUID' that it | |||
2567 | // presumably uses to represent these constants. | |||
2568 | MSGuidDecl::Parts Parts = GD->getParts(); | |||
2569 | llvm::Constant *Fields[4] = { | |||
2570 | llvm::ConstantInt::get(Int32Ty, Parts.Part1), | |||
2571 | llvm::ConstantInt::get(Int16Ty, Parts.Part2), | |||
2572 | llvm::ConstantInt::get(Int16Ty, Parts.Part3), | |||
2573 | llvm::ConstantDataArray::getRaw( | |||
2574 | StringRef(reinterpret_cast<char *>(Parts.Part4And5), 8), 8, | |||
2575 | Int8Ty)}; | |||
2576 | Init = llvm::ConstantStruct::getAnon(Fields); | |||
2577 | } | |||
2578 | ||||
2579 | auto *GV = new llvm::GlobalVariable( | |||
2580 | getModule(), Init->getType(), | |||
2581 | /*isConstant=*/true, llvm::GlobalValue::LinkOnceODRLinkage, Init, Name); | |||
2582 | if (supportsCOMDAT()) | |||
2583 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
2584 | setDSOLocal(GV); | |||
2585 | ||||
2586 | llvm::Constant *Addr = GV; | |||
2587 | if (!V.isAbsent()) { | |||
2588 | Emitter.finalize(GV); | |||
2589 | } else { | |||
2590 | llvm::Type *Ty = getTypes().ConvertTypeForMem(GD->getType()); | |||
2591 | Addr = llvm::ConstantExpr::getBitCast( | |||
2592 | GV, Ty->getPointerTo(GV->getAddressSpace())); | |||
2593 | } | |||
2594 | return ConstantAddress(Addr, Alignment); | |||
2595 | } | |||
2596 | ||||
2597 | ConstantAddress CodeGenModule::GetAddrOfTemplateParamObject( | |||
2598 | const TemplateParamObjectDecl *TPO) { | |||
2599 | ErrorUnsupported(TPO, "template parameter object"); | |||
2600 | return ConstantAddress::invalid(); | |||
2601 | } | |||
2602 | ||||
2603 | ConstantAddress CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { | |||
2604 | const AliasAttr *AA = VD->getAttr<AliasAttr>(); | |||
2605 | assert(AA && "No alias?")((AA && "No alias?") ? static_cast<void> (0) : __assert_fail ("AA && \"No alias?\"", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2605, __PRETTY_FUNCTION__)); | |||
2606 | ||||
2607 | CharUnits Alignment = getContext().getDeclAlign(VD); | |||
2608 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); | |||
2609 | ||||
2610 | // See if there is already something with the target's name in the module. | |||
2611 | llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); | |||
2612 | if (Entry) { | |||
2613 | unsigned AS = getContext().getTargetAddressSpace(VD->getType()); | |||
2614 | auto Ptr = llvm::ConstantExpr::getBitCast(Entry, DeclTy->getPointerTo(AS)); | |||
2615 | return ConstantAddress(Ptr, Alignment); | |||
2616 | } | |||
2617 | ||||
2618 | llvm::Constant *Aliasee; | |||
2619 | if (isa<llvm::FunctionType>(DeclTy)) | |||
2620 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, | |||
2621 | GlobalDecl(cast<FunctionDecl>(VD)), | |||
2622 | /*ForVTable=*/false); | |||
2623 | else | |||
2624 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), | |||
2625 | llvm::PointerType::getUnqual(DeclTy), | |||
2626 | nullptr); | |||
2627 | ||||
2628 | auto *F = cast<llvm::GlobalValue>(Aliasee); | |||
2629 | F->setLinkage(llvm::Function::ExternalWeakLinkage); | |||
2630 | WeakRefReferences.insert(F); | |||
2631 | ||||
2632 | return ConstantAddress(Aliasee, Alignment); | |||
2633 | } | |||
2634 | ||||
2635 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { | |||
2636 | const auto *Global = cast<ValueDecl>(GD.getDecl()); | |||
2637 | ||||
2638 | // Weak references don't produce any output by themselves. | |||
2639 | if (Global->hasAttr<WeakRefAttr>()) | |||
2640 | return; | |||
2641 | ||||
2642 | // If this is an alias definition (which otherwise looks like a declaration) | |||
2643 | // emit it now. | |||
2644 | if (Global->hasAttr<AliasAttr>()) | |||
2645 | return EmitAliasDefinition(GD); | |||
2646 | ||||
2647 | // IFunc like an alias whose value is resolved at runtime by calling resolver. | |||
2648 | if (Global->hasAttr<IFuncAttr>()) | |||
2649 | return emitIFuncDefinition(GD); | |||
2650 | ||||
2651 | // If this is a cpu_dispatch multiversion function, emit the resolver. | |||
2652 | if (Global->hasAttr<CPUDispatchAttr>()) | |||
2653 | return emitCPUDispatchDefinition(GD); | |||
2654 | ||||
2655 | // If this is CUDA, be selective about which declarations we emit. | |||
2656 | if (LangOpts.CUDA) { | |||
2657 | if (LangOpts.CUDAIsDevice) { | |||
2658 | if (!Global->hasAttr<CUDADeviceAttr>() && | |||
2659 | !Global->hasAttr<CUDAGlobalAttr>() && | |||
2660 | !Global->hasAttr<CUDAConstantAttr>() && | |||
2661 | !Global->hasAttr<CUDASharedAttr>() && | |||
2662 | !Global->getType()->isCUDADeviceBuiltinSurfaceType() && | |||
2663 | !Global->getType()->isCUDADeviceBuiltinTextureType()) | |||
2664 | return; | |||
2665 | } else { | |||
2666 | // We need to emit host-side 'shadows' for all global | |||
2667 | // device-side variables because the CUDA runtime needs their | |||
2668 | // size and host-side address in order to provide access to | |||
2669 | // their device-side incarnations. | |||
2670 | ||||
2671 | // So device-only functions are the only things we skip. | |||
2672 | if (isa<FunctionDecl>(Global) && !Global->hasAttr<CUDAHostAttr>() && | |||
2673 | Global->hasAttr<CUDADeviceAttr>()) | |||
2674 | return; | |||
2675 | ||||
2676 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2677, __PRETTY_FUNCTION__)) | |||
2677 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2677, __PRETTY_FUNCTION__)); | |||
2678 | } | |||
2679 | } | |||
2680 | ||||
2681 | if (LangOpts.OpenMP) { | |||
2682 | // If this is OpenMP, check if it is legal to emit this global normally. | |||
2683 | if (OpenMPRuntime && OpenMPRuntime->emitTargetGlobal(GD)) | |||
2684 | return; | |||
2685 | if (auto *DRD = dyn_cast<OMPDeclareReductionDecl>(Global)) { | |||
2686 | if (MustBeEmitted(Global)) | |||
2687 | EmitOMPDeclareReduction(DRD); | |||
2688 | return; | |||
2689 | } else if (auto *DMD = dyn_cast<OMPDeclareMapperDecl>(Global)) { | |||
2690 | if (MustBeEmitted(Global)) | |||
2691 | EmitOMPDeclareMapper(DMD); | |||
2692 | return; | |||
2693 | } | |||
2694 | } | |||
2695 | ||||
2696 | // Ignore declarations, they will be emitted on their first use. | |||
2697 | if (const auto *FD = dyn_cast<FunctionDecl>(Global)) { | |||
2698 | // Forward declarations are emitted lazily on first use. | |||
2699 | if (!FD->doesThisDeclarationHaveABody()) { | |||
2700 | if (!FD->doesDeclarationForceExternallyVisibleDefinition()) | |||
2701 | return; | |||
2702 | ||||
2703 | StringRef MangledName = getMangledName(GD); | |||
2704 | ||||
2705 | // Compute the function info and LLVM type. | |||
2706 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
2707 | llvm::Type *Ty = getTypes().GetFunctionType(FI); | |||
2708 | ||||
2709 | GetOrCreateLLVMFunction(MangledName, Ty, GD, /*ForVTable=*/false, | |||
2710 | /*DontDefer=*/false); | |||
2711 | return; | |||
2712 | } | |||
2713 | } else { | |||
2714 | const auto *VD = cast<VarDecl>(Global); | |||
2715 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2715, __PRETTY_FUNCTION__)); | |||
2716 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition && | |||
2717 | !Context.isMSStaticDataMemberInlineDefinition(VD)) { | |||
2718 | if (LangOpts.OpenMP) { | |||
2719 | // Emit declaration of the must-be-emitted declare target variable. | |||
2720 | if (llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res = | |||
2721 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD)) { | |||
2722 | bool UnifiedMemoryEnabled = | |||
2723 | getOpenMPRuntime().hasRequiresUnifiedSharedMemory(); | |||
2724 | if (*Res == OMPDeclareTargetDeclAttr::MT_To && | |||
2725 | !UnifiedMemoryEnabled) { | |||
2726 | (void)GetAddrOfGlobalVar(VD); | |||
2727 | } else { | |||
2728 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2731, __PRETTY_FUNCTION__)) | |||
2729 | (*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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2731, __PRETTY_FUNCTION__)) | |||
2730 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2731, __PRETTY_FUNCTION__)) | |||
2731 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2731, __PRETTY_FUNCTION__)); | |||
2732 | (void)getOpenMPRuntime().getAddrOfDeclareTargetVar(VD); | |||
2733 | } | |||
2734 | ||||
2735 | return; | |||
2736 | } | |||
2737 | } | |||
2738 | // If this declaration may have caused an inline variable definition to | |||
2739 | // change linkage, make sure that it's emitted. | |||
2740 | if (Context.getInlineVariableDefinitionKind(VD) == | |||
2741 | ASTContext::InlineVariableDefinitionKind::Strong) | |||
2742 | GetAddrOfGlobalVar(VD); | |||
2743 | return; | |||
2744 | } | |||
2745 | } | |||
2746 | ||||
2747 | // Defer code generation to first use when possible, e.g. if this is an inline | |||
2748 | // function. If the global must always be emitted, do it eagerly if possible | |||
2749 | // to benefit from cache locality. | |||
2750 | if (MustBeEmitted(Global) && MayBeEmittedEagerly(Global)) { | |||
2751 | // Emit the definition if it can't be deferred. | |||
2752 | EmitGlobalDefinition(GD); | |||
2753 | return; | |||
2754 | } | |||
2755 | ||||
2756 | // If we're deferring emission of a C++ variable with an | |||
2757 | // initializer, remember the order in which it appeared in the file. | |||
2758 | if (getLangOpts().CPlusPlus && isa<VarDecl>(Global) && | |||
2759 | cast<VarDecl>(Global)->hasInit()) { | |||
2760 | DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); | |||
2761 | CXXGlobalInits.push_back(nullptr); | |||
2762 | } | |||
2763 | ||||
2764 | StringRef MangledName = getMangledName(GD); | |||
2765 | if (GetGlobalValue(MangledName) != nullptr) { | |||
2766 | // The value has already been used and should therefore be emitted. | |||
2767 | addDeferredDeclToEmit(GD); | |||
2768 | } else if (MustBeEmitted(Global)) { | |||
2769 | // The value must be emitted, but cannot be emitted eagerly. | |||
2770 | assert(!MayBeEmittedEagerly(Global))((!MayBeEmittedEagerly(Global)) ? static_cast<void> (0) : __assert_fail ("!MayBeEmittedEagerly(Global)", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 2770, __PRETTY_FUNCTION__)); | |||
2771 | addDeferredDeclToEmit(GD); | |||
2772 | } else { | |||
2773 | // Otherwise, remember that we saw a deferred decl with this name. The | |||
2774 | // first use of the mangled name will cause it to move into | |||
2775 | // DeferredDeclsToEmit. | |||
2776 | DeferredDecls[MangledName] = GD; | |||
2777 | } | |||
2778 | } | |||
2779 | ||||
2780 | // Check if T is a class type with a destructor that's not dllimport. | |||
2781 | static bool HasNonDllImportDtor(QualType T) { | |||
2782 | if (const auto *RT = T->getBaseElementTypeUnsafe()->getAs<RecordType>()) | |||
2783 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) | |||
2784 | if (RD->getDestructor() && !RD->getDestructor()->hasAttr<DLLImportAttr>()) | |||
2785 | return true; | |||
2786 | ||||
2787 | return false; | |||
2788 | } | |||
2789 | ||||
2790 | namespace { | |||
2791 | struct FunctionIsDirectlyRecursive | |||
2792 | : public ConstStmtVisitor<FunctionIsDirectlyRecursive, bool> { | |||
2793 | const StringRef Name; | |||
2794 | const Builtin::Context &BI; | |||
2795 | FunctionIsDirectlyRecursive(StringRef N, const Builtin::Context &C) | |||
2796 | : Name(N), BI(C) {} | |||
2797 | ||||
2798 | bool VisitCallExpr(const CallExpr *E) { | |||
2799 | const FunctionDecl *FD = E->getDirectCallee(); | |||
2800 | if (!FD) | |||
2801 | return false; | |||
2802 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); | |||
2803 | if (Attr && Name == Attr->getLabel()) | |||
2804 | return true; | |||
2805 | unsigned BuiltinID = FD->getBuiltinID(); | |||
2806 | if (!BuiltinID || !BI.isLibFunction(BuiltinID)) | |||
2807 | return false; | |||
2808 | StringRef BuiltinName = BI.getName(BuiltinID); | |||
2809 | if (BuiltinName.startswith("__builtin_") && | |||
2810 | Name == BuiltinName.slice(strlen("__builtin_"), StringRef::npos)) { | |||
2811 | return true; | |||
2812 | } | |||
2813 | return false; | |||
2814 | } | |||
2815 | ||||
2816 | bool VisitStmt(const Stmt *S) { | |||
2817 | for (const Stmt *Child : S->children()) | |||
2818 | if (Child && this->Visit(Child)) | |||
2819 | return true; | |||
2820 | return false; | |||
2821 | } | |||
2822 | }; | |||
2823 | ||||
2824 | // Make sure we're not referencing non-imported vars or functions. | |||
2825 | struct DLLImportFunctionVisitor | |||
2826 | : public RecursiveASTVisitor<DLLImportFunctionVisitor> { | |||
2827 | bool SafeToInline = true; | |||
2828 | ||||
2829 | bool shouldVisitImplicitCode() const { return true; } | |||
2830 | ||||
2831 | bool VisitVarDecl(VarDecl *VD) { | |||
2832 | if (VD->getTLSKind()) { | |||
2833 | // A thread-local variable cannot be imported. | |||
2834 | SafeToInline = false; | |||
2835 | return SafeToInline; | |||
2836 | } | |||
2837 | ||||
2838 | // A variable definition might imply a destructor call. | |||
2839 | if (VD->isThisDeclarationADefinition()) | |||
2840 | SafeToInline = !HasNonDllImportDtor(VD->getType()); | |||
2841 | ||||
2842 | return SafeToInline; | |||
2843 | } | |||
2844 | ||||
2845 | bool VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { | |||
2846 | if (const auto *D = E->getTemporary()->getDestructor()) | |||
2847 | SafeToInline = D->hasAttr<DLLImportAttr>(); | |||
2848 | return SafeToInline; | |||
2849 | } | |||
2850 | ||||
2851 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
2852 | ValueDecl *VD = E->getDecl(); | |||
2853 | if (isa<FunctionDecl>(VD)) | |||
2854 | SafeToInline = VD->hasAttr<DLLImportAttr>(); | |||
2855 | else if (VarDecl *V = dyn_cast<VarDecl>(VD)) | |||
2856 | SafeToInline = !V->hasGlobalStorage() || V->hasAttr<DLLImportAttr>(); | |||
2857 | return SafeToInline; | |||
2858 | } | |||
2859 | ||||
2860 | bool VisitCXXConstructExpr(CXXConstructExpr *E) { | |||
2861 | SafeToInline = E->getConstructor()->hasAttr<DLLImportAttr>(); | |||
2862 | return SafeToInline; | |||
2863 | } | |||
2864 | ||||
2865 | bool VisitCXXMemberCallExpr(CXXMemberCallExpr *E) { | |||
2866 | CXXMethodDecl *M = E->getMethodDecl(); | |||
2867 | if (!M) { | |||
2868 | // Call through a pointer to member function. This is safe to inline. | |||
2869 | SafeToInline = true; | |||
2870 | } else { | |||
2871 | SafeToInline = M->hasAttr<DLLImportAttr>(); | |||
2872 | } | |||
2873 | return SafeToInline; | |||
2874 | } | |||
2875 | ||||
2876 | bool VisitCXXDeleteExpr(CXXDeleteExpr *E) { | |||
2877 | SafeToInline = E->getOperatorDelete()->hasAttr<DLLImportAttr>(); | |||
2878 | return SafeToInline; | |||
2879 | } | |||
2880 | ||||
2881 | bool VisitCXXNewExpr(CXXNewExpr *E) { | |||
2882 | SafeToInline = E->getOperatorNew()->hasAttr<DLLImportAttr>(); | |||
2883 | return SafeToInline; | |||
2884 | } | |||
2885 | }; | |||
2886 | } | |||
2887 | ||||
2888 | // isTriviallyRecursive - Check if this function calls another | |||
2889 | // decl that, because of the asm attribute or the other decl being a builtin, | |||
2890 | // ends up pointing to itself. | |||
2891 | bool | |||
2892 | CodeGenModule::isTriviallyRecursive(const FunctionDecl *FD) { | |||
2893 | StringRef Name; | |||
2894 | if (getCXXABI().getMangleContext().shouldMangleDeclName(FD)) { | |||
2895 | // asm labels are a special kind of mangling we have to support. | |||
2896 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); | |||
2897 | if (!Attr) | |||
2898 | return false; | |||
2899 | Name = Attr->getLabel(); | |||
2900 | } else { | |||
2901 | Name = FD->getName(); | |||
2902 | } | |||
2903 | ||||
2904 | FunctionIsDirectlyRecursive Walker(Name, Context.BuiltinInfo); | |||
2905 | const Stmt *Body = FD->getBody(); | |||
2906 | return Body ? Walker.Visit(Body) : false; | |||
2907 | } | |||
2908 | ||||
2909 | bool CodeGenModule::shouldEmitFunction(GlobalDecl GD) { | |||
2910 | if (getFunctionLinkage(GD) != llvm::Function::AvailableExternallyLinkage) | |||
2911 | return true; | |||
2912 | const auto *F = cast<FunctionDecl>(GD.getDecl()); | |||
2913 | if (CodeGenOpts.OptimizationLevel == 0 && !F->hasAttr<AlwaysInlineAttr>()) | |||
2914 | return false; | |||
2915 | ||||
2916 | if (F->hasAttr<DLLImportAttr>()) { | |||
2917 | // Check whether it would be safe to inline this dllimport function. | |||
2918 | DLLImportFunctionVisitor Visitor; | |||
2919 | Visitor.TraverseFunctionDecl(const_cast<FunctionDecl*>(F)); | |||
2920 | if (!Visitor.SafeToInline) | |||
2921 | return false; | |||
2922 | ||||
2923 | if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(F)) { | |||
2924 | // Implicit destructor invocations aren't captured in the AST, so the | |||
2925 | // check above can't see them. Check for them manually here. | |||
2926 | for (const Decl *Member : Dtor->getParent()->decls()) | |||
2927 | if (isa<FieldDecl>(Member)) | |||
2928 | if (HasNonDllImportDtor(cast<FieldDecl>(Member)->getType())) | |||
2929 | return false; | |||
2930 | for (const CXXBaseSpecifier &B : Dtor->getParent()->bases()) | |||
2931 | if (HasNonDllImportDtor(B.getType())) | |||
2932 | return false; | |||
2933 | } | |||
2934 | } | |||
2935 | ||||
2936 | // PR9614. Avoid cases where the source code is lying to us. An available | |||
2937 | // externally function should have an equivalent function somewhere else, | |||
2938 | // but a function that calls itself through asm label/`__builtin_` trickery is | |||
2939 | // clearly not equivalent to the real implementation. | |||
2940 | // This happens in glibc's btowc and in some configure checks. | |||
2941 | return !isTriviallyRecursive(F); | |||
2942 | } | |||
2943 | ||||
2944 | bool CodeGenModule::shouldOpportunisticallyEmitVTables() { | |||
2945 | return CodeGenOpts.OptimizationLevel > 0; | |||
2946 | } | |||
2947 | ||||
2948 | void CodeGenModule::EmitMultiVersionFunctionDefinition(GlobalDecl GD, | |||
2949 | llvm::GlobalValue *GV) { | |||
2950 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
2951 | ||||
2952 | if (FD->isCPUSpecificMultiVersion()) { | |||
2953 | auto *Spec = FD->getAttr<CPUSpecificAttr>(); | |||
2954 | for (unsigned I = 0; I < Spec->cpus_size(); ++I) | |||
2955 | EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr); | |||
2956 | // Requires multiple emits. | |||
2957 | } else | |||
2958 | EmitGlobalFunctionDefinition(GD, GV); | |||
2959 | } | |||
2960 | ||||
2961 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD, llvm::GlobalValue *GV) { | |||
2962 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
2963 | ||||
2964 | PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), | |||
2965 | Context.getSourceManager(), | |||
2966 | "Generating code for declaration"); | |||
2967 | ||||
2968 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
2969 | // At -O0, don't generate IR for functions with available_externally | |||
2970 | // linkage. | |||
2971 | if (!shouldEmitFunction(GD)) | |||
2972 | return; | |||
2973 | ||||
2974 | llvm::TimeTraceScope TimeScope("CodeGen Function", [&]() { | |||
2975 | std::string Name; | |||
2976 | llvm::raw_string_ostream OS(Name); | |||
2977 | FD->getNameForDiagnostic(OS, getContext().getPrintingPolicy(), | |||
2978 | /*Qualified=*/true); | |||
2979 | return Name; | |||
2980 | }); | |||
2981 | ||||
2982 | if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
2983 | // Make sure to emit the definition(s) before we emit the thunks. | |||
2984 | // This is necessary for the generation of certain thunks. | |||
2985 | if (isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method)) | |||
2986 | ABI->emitCXXStructor(GD); | |||
2987 | else if (FD->isMultiVersion()) | |||
2988 | EmitMultiVersionFunctionDefinition(GD, GV); | |||
2989 | else | |||
2990 | EmitGlobalFunctionDefinition(GD, GV); | |||
2991 | ||||
2992 | if (Method->isVirtual()) | |||
2993 | getVTables().EmitThunks(GD); | |||
2994 | ||||
2995 | return; | |||
2996 | } | |||
2997 | ||||
2998 | if (FD->isMultiVersion()) | |||
2999 | return EmitMultiVersionFunctionDefinition(GD, GV); | |||
3000 | return EmitGlobalFunctionDefinition(GD, GV); | |||
3001 | } | |||
3002 | ||||
3003 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
3004 | return EmitGlobalVarDefinition(VD, !VD->hasDefinition()); | |||
3005 | ||||
3006 | llvm_unreachable("Invalid argument to EmitGlobalDefinition()")::llvm::llvm_unreachable_internal("Invalid argument to EmitGlobalDefinition()" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3006); | |||
3007 | } | |||
3008 | ||||
3009 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, | |||
3010 | llvm::Function *NewFn); | |||
3011 | ||||
3012 | static unsigned | |||
3013 | TargetMVPriority(const TargetInfo &TI, | |||
3014 | const CodeGenFunction::MultiVersionResolverOption &RO) { | |||
3015 | unsigned Priority = 0; | |||
3016 | for (StringRef Feat : RO.Conditions.Features) | |||
3017 | Priority = std::max(Priority, TI.multiVersionSortPriority(Feat)); | |||
3018 | ||||
3019 | if (!RO.Conditions.Architecture.empty()) | |||
3020 | Priority = std::max( | |||
3021 | Priority, TI.multiVersionSortPriority(RO.Conditions.Architecture)); | |||
3022 | return Priority; | |||
3023 | } | |||
3024 | ||||
3025 | void CodeGenModule::emitMultiVersionFunctions() { | |||
3026 | for (GlobalDecl GD : MultiVersionFuncs) { | |||
3027 | SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options; | |||
3028 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3029 | getContext().forEachMultiversionedFunctionVersion( | |||
3030 | FD, [this, &GD, &Options](const FunctionDecl *CurFD) { | |||
3031 | GlobalDecl CurGD{ | |||
3032 | (CurFD->isDefined() ? CurFD->getDefinition() : CurFD)}; | |||
3033 | StringRef MangledName = getMangledName(CurGD); | |||
3034 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
3035 | if (!Func) { | |||
3036 | if (CurFD->isDefined()) { | |||
3037 | EmitGlobalFunctionDefinition(CurGD, nullptr); | |||
3038 | Func = GetGlobalValue(MangledName); | |||
3039 | } else { | |||
3040 | const CGFunctionInfo &FI = | |||
3041 | getTypes().arrangeGlobalDeclaration(GD); | |||
3042 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
3043 | Func = GetAddrOfFunction(CurGD, Ty, /*ForVTable=*/false, | |||
3044 | /*DontDefer=*/false, ForDefinition); | |||
3045 | } | |||
3046 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3046, __PRETTY_FUNCTION__)); | |||
3047 | } | |||
3048 | ||||
3049 | const auto *TA = CurFD->getAttr<TargetAttr>(); | |||
3050 | llvm::SmallVector<StringRef, 8> Feats; | |||
3051 | TA->getAddedFeatures(Feats); | |||
3052 | ||||
3053 | Options.emplace_back(cast<llvm::Function>(Func), | |||
3054 | TA->getArchitecture(), Feats); | |||
3055 | }); | |||
3056 | ||||
3057 | llvm::Function *ResolverFunc; | |||
3058 | const TargetInfo &TI = getTarget(); | |||
3059 | ||||
3060 | if (TI.supportsIFunc() || FD->isTargetMultiVersion()) { | |||
3061 | ResolverFunc = cast<llvm::Function>( | |||
3062 | GetGlobalValue((getMangledName(GD) + ".resolver").str())); | |||
3063 | ResolverFunc->setLinkage(llvm::Function::WeakODRLinkage); | |||
3064 | } else { | |||
3065 | ResolverFunc = cast<llvm::Function>(GetGlobalValue(getMangledName(GD))); | |||
3066 | } | |||
3067 | ||||
3068 | if (supportsCOMDAT()) | |||
3069 | ResolverFunc->setComdat( | |||
3070 | getModule().getOrInsertComdat(ResolverFunc->getName())); | |||
3071 | ||||
3072 | llvm::stable_sort( | |||
3073 | Options, [&TI](const CodeGenFunction::MultiVersionResolverOption &LHS, | |||
3074 | const CodeGenFunction::MultiVersionResolverOption &RHS) { | |||
3075 | return TargetMVPriority(TI, LHS) > TargetMVPriority(TI, RHS); | |||
3076 | }); | |||
3077 | CodeGenFunction CGF(*this); | |||
3078 | CGF.EmitMultiVersionResolver(ResolverFunc, Options); | |||
3079 | } | |||
3080 | } | |||
3081 | ||||
3082 | void CodeGenModule::emitCPUDispatchDefinition(GlobalDecl GD) { | |||
3083 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3084 | assert(FD && "Not a FunctionDecl?")((FD && "Not a FunctionDecl?") ? static_cast<void> (0) : __assert_fail ("FD && \"Not a FunctionDecl?\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3084, __PRETTY_FUNCTION__)); | |||
3085 | const auto *DD = FD->getAttr<CPUDispatchAttr>(); | |||
3086 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3086, __PRETTY_FUNCTION__)); | |||
3087 | llvm::Type *DeclTy = getTypes().ConvertType(FD->getType()); | |||
3088 | ||||
3089 | if (const auto *CXXFD = dyn_cast<CXXMethodDecl>(FD)) { | |||
3090 | const CGFunctionInfo &FInfo = getTypes().arrangeCXXMethodDeclaration(CXXFD); | |||
3091 | DeclTy = getTypes().GetFunctionType(FInfo); | |||
3092 | } | |||
3093 | ||||
3094 | StringRef ResolverName = getMangledName(GD); | |||
3095 | ||||
3096 | llvm::Type *ResolverType; | |||
3097 | GlobalDecl ResolverGD; | |||
3098 | if (getTarget().supportsIFunc()) | |||
3099 | ResolverType = llvm::FunctionType::get( | |||
3100 | llvm::PointerType::get(DeclTy, | |||
3101 | Context.getTargetAddressSpace(FD->getType())), | |||
3102 | false); | |||
3103 | else { | |||
3104 | ResolverType = DeclTy; | |||
3105 | ResolverGD = GD; | |||
3106 | } | |||
3107 | ||||
3108 | auto *ResolverFunc = cast<llvm::Function>(GetOrCreateLLVMFunction( | |||
3109 | ResolverName, ResolverType, ResolverGD, /*ForVTable=*/false)); | |||
3110 | ResolverFunc->setLinkage(llvm::Function::WeakODRLinkage); | |||
3111 | if (supportsCOMDAT()) | |||
3112 | ResolverFunc->setComdat( | |||
3113 | getModule().getOrInsertComdat(ResolverFunc->getName())); | |||
3114 | ||||
3115 | SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options; | |||
3116 | const TargetInfo &Target = getTarget(); | |||
3117 | unsigned Index = 0; | |||
3118 | for (const IdentifierInfo *II : DD->cpus()) { | |||
3119 | // Get the name of the target function so we can look it up/create it. | |||
3120 | std::string MangledName = getMangledNameImpl(*this, GD, FD, true) + | |||
3121 | getCPUSpecificMangling(*this, II->getName()); | |||
3122 | ||||
3123 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
3124 | ||||
3125 | if (!Func) { | |||
3126 | GlobalDecl ExistingDecl = Manglings.lookup(MangledName); | |||
3127 | if (ExistingDecl.getDecl() && | |||
3128 | ExistingDecl.getDecl()->getAsFunction()->isDefined()) { | |||
3129 | EmitGlobalFunctionDefinition(ExistingDecl, nullptr); | |||
3130 | Func = GetGlobalValue(MangledName); | |||
3131 | } else { | |||
3132 | if (!ExistingDecl.getDecl()) | |||
3133 | ExistingDecl = GD.getWithMultiVersionIndex(Index); | |||
3134 | ||||
3135 | Func = GetOrCreateLLVMFunction( | |||
3136 | MangledName, DeclTy, ExistingDecl, | |||
3137 | /*ForVTable=*/false, /*DontDefer=*/true, | |||
3138 | /*IsThunk=*/false, llvm::AttributeList(), ForDefinition); | |||
3139 | } | |||
3140 | } | |||
3141 | ||||
3142 | llvm::SmallVector<StringRef, 32> Features; | |||
3143 | Target.getCPUSpecificCPUDispatchFeatures(II->getName(), Features); | |||
3144 | llvm::transform(Features, Features.begin(), | |||
3145 | [](StringRef Str) { return Str.substr(1); }); | |||
3146 | Features.erase(std::remove_if( | |||
3147 | Features.begin(), Features.end(), [&Target](StringRef Feat) { | |||
3148 | return !Target.validateCpuSupports(Feat); | |||
3149 | }), Features.end()); | |||
3150 | Options.emplace_back(cast<llvm::Function>(Func), StringRef{}, Features); | |||
3151 | ++Index; | |||
3152 | } | |||
3153 | ||||
3154 | llvm::sort( | |||
3155 | Options, [](const CodeGenFunction::MultiVersionResolverOption &LHS, | |||
3156 | const CodeGenFunction::MultiVersionResolverOption &RHS) { | |||
3157 | return CodeGenFunction::GetX86CpuSupportsMask(LHS.Conditions.Features) > | |||
3158 | CodeGenFunction::GetX86CpuSupportsMask(RHS.Conditions.Features); | |||
3159 | }); | |||
3160 | ||||
3161 | // If the list contains multiple 'default' versions, such as when it contains | |||
3162 | // 'pentium' and 'generic', don't emit the call to the generic one (since we | |||
3163 | // always run on at least a 'pentium'). We do this by deleting the 'least | |||
3164 | // advanced' (read, lowest mangling letter). | |||
3165 | while (Options.size() > 1 && | |||
3166 | CodeGenFunction::GetX86CpuSupportsMask( | |||
3167 | (Options.end() - 2)->Conditions.Features) == 0) { | |||
3168 | StringRef LHSName = (Options.end() - 2)->Function->getName(); | |||
3169 | StringRef RHSName = (Options.end() - 1)->Function->getName(); | |||
3170 | if (LHSName.compare(RHSName) < 0) | |||
3171 | Options.erase(Options.end() - 2); | |||
3172 | else | |||
3173 | Options.erase(Options.end() - 1); | |||
3174 | } | |||
3175 | ||||
3176 | CodeGenFunction CGF(*this); | |||
3177 | CGF.EmitMultiVersionResolver(ResolverFunc, Options); | |||
3178 | ||||
3179 | if (getTarget().supportsIFunc()) { | |||
3180 | std::string AliasName = getMangledNameImpl( | |||
3181 | *this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
3182 | llvm::Constant *AliasFunc = GetGlobalValue(AliasName); | |||
3183 | if (!AliasFunc) { | |||
3184 | auto *IFunc = cast<llvm::GlobalIFunc>(GetOrCreateLLVMFunction( | |||
3185 | AliasName, DeclTy, GD, /*ForVTable=*/false, /*DontDefer=*/true, | |||
3186 | /*IsThunk=*/false, llvm::AttributeList(), NotForDefinition)); | |||
3187 | auto *GA = llvm::GlobalAlias::create( | |||
3188 | DeclTy, 0, getFunctionLinkage(GD), AliasName, IFunc, &getModule()); | |||
3189 | GA->setLinkage(llvm::Function::WeakODRLinkage); | |||
3190 | SetCommonAttributes(GD, GA); | |||
3191 | } | |||
3192 | } | |||
3193 | } | |||
3194 | ||||
3195 | /// If a dispatcher for the specified mangled name is not in the module, create | |||
3196 | /// and return an llvm Function with the specified type. | |||
3197 | llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver( | |||
3198 | GlobalDecl GD, llvm::Type *DeclTy, const FunctionDecl *FD) { | |||
3199 | std::string MangledName = | |||
3200 | getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
3201 | ||||
3202 | // Holds the name of the resolver, in ifunc mode this is the ifunc (which has | |||
3203 | // a separate resolver). | |||
3204 | std::string ResolverName = MangledName; | |||
3205 | if (getTarget().supportsIFunc()) | |||
3206 | ResolverName += ".ifunc"; | |||
3207 | else if (FD->isTargetMultiVersion()) | |||
3208 | ResolverName += ".resolver"; | |||
3209 | ||||
3210 | // If this already exists, just return that one. | |||
3211 | if (llvm::GlobalValue *ResolverGV = GetGlobalValue(ResolverName)) | |||
3212 | return ResolverGV; | |||
3213 | ||||
3214 | // Since this is the first time we've created this IFunc, make sure | |||
3215 | // that we put this multiversioned function into the list to be | |||
3216 | // replaced later if necessary (target multiversioning only). | |||
3217 | if (!FD->isCPUDispatchMultiVersion() && !FD->isCPUSpecificMultiVersion()) | |||
3218 | MultiVersionFuncs.push_back(GD); | |||
3219 | ||||
3220 | if (getTarget().supportsIFunc()) { | |||
3221 | llvm::Type *ResolverType = llvm::FunctionType::get( | |||
3222 | llvm::PointerType::get( | |||
3223 | DeclTy, getContext().getTargetAddressSpace(FD->getType())), | |||
3224 | false); | |||
3225 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
3226 | MangledName + ".resolver", ResolverType, GlobalDecl{}, | |||
3227 | /*ForVTable=*/false); | |||
3228 | llvm::GlobalIFunc *GIF = llvm::GlobalIFunc::create( | |||
3229 | DeclTy, 0, llvm::Function::WeakODRLinkage, "", Resolver, &getModule()); | |||
3230 | GIF->setName(ResolverName); | |||
3231 | SetCommonAttributes(FD, GIF); | |||
3232 | ||||
3233 | return GIF; | |||
3234 | } | |||
3235 | ||||
3236 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
3237 | ResolverName, DeclTy, GlobalDecl{}, /*ForVTable=*/false); | |||
3238 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3239, __PRETTY_FUNCTION__)) | |||
3239 | "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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3239, __PRETTY_FUNCTION__)); | |||
3240 | SetCommonAttributes(FD, cast<llvm::GlobalValue>(Resolver)); | |||
3241 | return Resolver; | |||
3242 | } | |||
3243 | ||||
3244 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the | |||
3245 | /// module, create and return an llvm Function with the specified type. If there | |||
3246 | /// is something in the module with the specified name, return it potentially | |||
3247 | /// bitcasted to the right type. | |||
3248 | /// | |||
3249 | /// If D is non-null, it specifies a decl that correspond to this. This is used | |||
3250 | /// to set the attributes on the function when it is first created. | |||
3251 | llvm::Constant *CodeGenModule::GetOrCreateLLVMFunction( | |||
3252 | StringRef MangledName, llvm::Type *Ty, GlobalDecl GD, bool ForVTable, | |||
3253 | bool DontDefer, bool IsThunk, llvm::AttributeList ExtraAttrs, | |||
3254 | ForDefinition_t IsForDefinition) { | |||
3255 | const Decl *D = GD.getDecl(); | |||
3256 | ||||
3257 | // Any attempts to use a MultiVersion function should result in retrieving | |||
3258 | // the iFunc instead. Name Mangling will handle the rest of the changes. | |||
3259 | if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D)) { | |||
3260 | // For the device mark the function as one that should be emitted. | |||
3261 | if (getLangOpts().OpenMPIsDevice && OpenMPRuntime && | |||
3262 | !OpenMPRuntime->markAsGlobalTarget(GD) && FD->isDefined() && | |||
3263 | !DontDefer && !IsForDefinition) { | |||
3264 | if (const FunctionDecl *FDDef = FD->getDefinition()) { | |||
3265 | GlobalDecl GDDef; | |||
3266 | if (const auto *CD = dyn_cast<CXXConstructorDecl>(FDDef)) | |||
3267 | GDDef = GlobalDecl(CD, GD.getCtorType()); | |||
3268 | else if (const auto *DD = dyn_cast<CXXDestructorDecl>(FDDef)) | |||
3269 | GDDef = GlobalDecl(DD, GD.getDtorType()); | |||
3270 | else | |||
3271 | GDDef = GlobalDecl(FDDef); | |||
3272 | EmitGlobal(GDDef); | |||
3273 | } | |||
3274 | } | |||
3275 | ||||
3276 | if (FD->isMultiVersion()) { | |||
3277 | if (FD->hasAttr<TargetAttr>()) | |||
3278 | UpdateMultiVersionNames(GD, FD); | |||
3279 | if (!IsForDefinition) | |||
3280 | return GetOrCreateMultiVersionResolver(GD, Ty, FD); | |||
3281 | } | |||
3282 | } | |||
3283 | ||||
3284 | // Lookup the entry, lazily creating it if necessary. | |||
3285 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
3286 | if (Entry) { | |||
3287 | if (WeakRefReferences.erase(Entry)) { | |||
3288 | const FunctionDecl *FD = cast_or_null<FunctionDecl>(D); | |||
3289 | if (FD && !FD->hasAttr<WeakAttr>()) | |||
3290 | Entry->setLinkage(llvm::Function::ExternalLinkage); | |||
3291 | } | |||
3292 | ||||
3293 | // Handle dropped DLL attributes. | |||
3294 | if (D && !D->hasAttr<DLLImportAttr>() && !D->hasAttr<DLLExportAttr>()) { | |||
3295 | Entry->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
3296 | setDSOLocal(Entry); | |||
3297 | } | |||
3298 | ||||
3299 | // If there are two attempts to define the same mangled name, issue an | |||
3300 | // error. | |||
3301 | if (IsForDefinition && !Entry->isDeclaration()) { | |||
3302 | GlobalDecl OtherGD; | |||
3303 | // Check that GD is not yet in DiagnosedConflictingDefinitions is required | |||
3304 | // to make sure that we issue an error only once. | |||
3305 | if (lookupRepresentativeDecl(MangledName, OtherGD) && | |||
3306 | (GD.getCanonicalDecl().getDecl() != | |||
3307 | OtherGD.getCanonicalDecl().getDecl()) && | |||
3308 | DiagnosedConflictingDefinitions.insert(GD).second) { | |||
3309 | getDiags().Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
3310 | << MangledName; | |||
3311 | getDiags().Report(OtherGD.getDecl()->getLocation(), | |||
3312 | diag::note_previous_definition); | |||
3313 | } | |||
3314 | } | |||
3315 | ||||
3316 | if ((isa<llvm::Function>(Entry) || isa<llvm::GlobalAlias>(Entry)) && | |||
3317 | (Entry->getValueType() == Ty)) { | |||
3318 | return Entry; | |||
3319 | } | |||
3320 | ||||
3321 | // Make sure the result is of the correct type. | |||
3322 | // (If function is requested for a definition, we always need to create a new | |||
3323 | // function, not just return a bitcast.) | |||
3324 | if (!IsForDefinition) | |||
3325 | return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); | |||
3326 | } | |||
3327 | ||||
3328 | // This function doesn't have a complete type (for example, the return | |||
3329 | // type is an incomplete struct). Use a fake type instead, and make | |||
3330 | // sure not to try to set attributes. | |||
3331 | bool IsIncompleteFunction = false; | |||
3332 | ||||
3333 | llvm::FunctionType *FTy; | |||
3334 | if (isa<llvm::FunctionType>(Ty)) { | |||
3335 | FTy = cast<llvm::FunctionType>(Ty); | |||
3336 | } else { | |||
3337 | FTy = llvm::FunctionType::get(VoidTy, false); | |||
3338 | IsIncompleteFunction = true; | |||
3339 | } | |||
3340 | ||||
3341 | llvm::Function *F = | |||
3342 | llvm::Function::Create(FTy, llvm::Function::ExternalLinkage, | |||
3343 | Entry ? StringRef() : MangledName, &getModule()); | |||
3344 | ||||
3345 | // If we already created a function with the same mangled name (but different | |||
3346 | // type) before, take its name and add it to the list of functions to be | |||
3347 | // replaced with F at the end of CodeGen. | |||
3348 | // | |||
3349 | // This happens if there is a prototype for a function (e.g. "int f()") and | |||
3350 | // then a definition of a different type (e.g. "int f(int x)"). | |||
3351 | if (Entry) { | |||
3352 | F->takeName(Entry); | |||
3353 | ||||
3354 | // This might be an implementation of a function without a prototype, in | |||
3355 | // which case, try to do special replacement of calls which match the new | |||
3356 | // prototype. The really key thing here is that we also potentially drop | |||
3357 | // arguments from the call site so as to make a direct call, which makes the | |||
3358 | // inliner happier and suppresses a number of optimizer warnings (!) about | |||
3359 | // dropping arguments. | |||
3360 | if (!Entry->use_empty()) { | |||
3361 | ReplaceUsesOfNonProtoTypeWithRealFunction(Entry, F); | |||
3362 | Entry->removeDeadConstantUsers(); | |||
3363 | } | |||
3364 | ||||
3365 | llvm::Constant *BC = llvm::ConstantExpr::getBitCast( | |||
3366 | F, Entry->getValueType()->getPointerTo()); | |||
3367 | addGlobalValReplacement(Entry, BC); | |||
3368 | } | |||
3369 | ||||
3370 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3370, __PRETTY_FUNCTION__)); | |||
3371 | if (D) | |||
3372 | SetFunctionAttributes(GD, F, IsIncompleteFunction, IsThunk); | |||
3373 | if (ExtraAttrs.hasAttributes(llvm::AttributeList::FunctionIndex)) { | |||
3374 | llvm::AttrBuilder B(ExtraAttrs, llvm::AttributeList::FunctionIndex); | |||
3375 | F->addAttributes(llvm::AttributeList::FunctionIndex, B); | |||
3376 | } | |||
3377 | ||||
3378 | if (!DontDefer) { | |||
3379 | // All MSVC dtors other than the base dtor are linkonce_odr and delegate to | |||
3380 | // each other bottoming out with the base dtor. Therefore we emit non-base | |||
3381 | // dtors on usage, even if there is no dtor definition in the TU. | |||
3382 | if (D && isa<CXXDestructorDecl>(D) && | |||
3383 | getCXXABI().useThunkForDtorVariant(cast<CXXDestructorDecl>(D), | |||
3384 | GD.getDtorType())) | |||
3385 | addDeferredDeclToEmit(GD); | |||
3386 | ||||
3387 | // This is the first use or definition of a mangled name. If there is a | |||
3388 | // deferred decl with this name, remember that we need to emit it at the end | |||
3389 | // of the file. | |||
3390 | auto DDI = DeferredDecls.find(MangledName); | |||
3391 | if (DDI != DeferredDecls.end()) { | |||
3392 | // Move the potentially referenced deferred decl to the | |||
3393 | // DeferredDeclsToEmit list, and remove it from DeferredDecls (since we | |||
3394 | // don't need it anymore). | |||
3395 | addDeferredDeclToEmit(DDI->second); | |||
3396 | DeferredDecls.erase(DDI); | |||
3397 | ||||
3398 | // Otherwise, there are cases we have to worry about where we're | |||
3399 | // using a declaration for which we must emit a definition but where | |||
3400 | // we might not find a top-level definition: | |||
3401 | // - member functions defined inline in their classes | |||
3402 | // - friend functions defined inline in some class | |||
3403 | // - special member functions with implicit definitions | |||
3404 | // If we ever change our AST traversal to walk into class methods, | |||
3405 | // this will be unnecessary. | |||
3406 | // | |||
3407 | // We also don't emit a definition for a function if it's going to be an | |||
3408 | // entry in a vtable, unless it's already marked as used. | |||
3409 | } else if (getLangOpts().CPlusPlus && D) { | |||
3410 | // Look for a declaration that's lexically in a record. | |||
3411 | for (const auto *FD = cast<FunctionDecl>(D)->getMostRecentDecl(); FD; | |||
3412 | FD = FD->getPreviousDecl()) { | |||
3413 | if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { | |||
3414 | if (FD->doesThisDeclarationHaveABody()) { | |||
3415 | addDeferredDeclToEmit(GD.getWithDecl(FD)); | |||
3416 | break; | |||
3417 | } | |||
3418 | } | |||
3419 | } | |||
3420 | } | |||
3421 | } | |||
3422 | ||||
3423 | // Make sure the result is of the requested type. | |||
3424 | if (!IsIncompleteFunction) { | |||
3425 | assert(F->getFunctionType() == Ty)((F->getFunctionType() == Ty) ? static_cast<void> (0 ) : __assert_fail ("F->getFunctionType() == Ty", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3425, __PRETTY_FUNCTION__)); | |||
3426 | return F; | |||
3427 | } | |||
3428 | ||||
3429 | llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); | |||
3430 | return llvm::ConstantExpr::getBitCast(F, PTy); | |||
3431 | } | |||
3432 | ||||
3433 | /// GetAddrOfFunction - Return the address of the given function. If Ty is | |||
3434 | /// non-null, then this function will use the specified type if it has to | |||
3435 | /// create it (this occurs when we see a definition of the function). | |||
3436 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, | |||
3437 | llvm::Type *Ty, | |||
3438 | bool ForVTable, | |||
3439 | bool DontDefer, | |||
3440 | ForDefinition_t IsForDefinition) { | |||
3441 | assert(!cast<FunctionDecl>(GD.getDecl())->isConsteval() &&((!cast<FunctionDecl>(GD.getDecl())->isConsteval() && "consteval function should never be emitted") ? static_cast< void> (0) : __assert_fail ("!cast<FunctionDecl>(GD.getDecl())->isConsteval() && \"consteval function should never be emitted\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3442, __PRETTY_FUNCTION__)) | |||
3442 | "consteval function should never be emitted")((!cast<FunctionDecl>(GD.getDecl())->isConsteval() && "consteval function should never be emitted") ? static_cast< void> (0) : __assert_fail ("!cast<FunctionDecl>(GD.getDecl())->isConsteval() && \"consteval function should never be emitted\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3442, __PRETTY_FUNCTION__)); | |||
3443 | // If there was no specific requested type, just convert it now. | |||
3444 | if (!Ty) { | |||
3445 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3446 | Ty = getTypes().ConvertType(FD->getType()); | |||
3447 | } | |||
3448 | ||||
3449 | // Devirtualized destructor calls may come through here instead of via | |||
3450 | // getAddrOfCXXStructor. Make sure we use the MS ABI base destructor instead | |||
3451 | // of the complete destructor when necessary. | |||
3452 | if (const auto *DD = dyn_cast<CXXDestructorDecl>(GD.getDecl())) { | |||
3453 | if (getTarget().getCXXABI().isMicrosoft() && | |||
3454 | GD.getDtorType() == Dtor_Complete && | |||
3455 | DD->getParent()->getNumVBases() == 0) | |||
3456 | GD = GlobalDecl(DD, Dtor_Base); | |||
3457 | } | |||
3458 | ||||
3459 | StringRef MangledName = getMangledName(GD); | |||
3460 | return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable, DontDefer, | |||
3461 | /*IsThunk=*/false, llvm::AttributeList(), | |||
3462 | IsForDefinition); | |||
3463 | } | |||
3464 | ||||
3465 | static const FunctionDecl * | |||
3466 | GetRuntimeFunctionDecl(ASTContext &C, StringRef Name) { | |||
3467 | TranslationUnitDecl *TUDecl = C.getTranslationUnitDecl(); | |||
3468 | DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl); | |||
3469 | ||||
3470 | IdentifierInfo &CII = C.Idents.get(Name); | |||
3471 | for (const auto &Result : DC->lookup(&CII)) | |||
3472 | if (const auto FD = dyn_cast<FunctionDecl>(Result)) | |||
3473 | return FD; | |||
3474 | ||||
3475 | if (!C.getLangOpts().CPlusPlus) | |||
3476 | return nullptr; | |||
3477 | ||||
3478 | // Demangle the premangled name from getTerminateFn() | |||
3479 | IdentifierInfo &CXXII = | |||
3480 | (Name == "_ZSt9terminatev" || Name == "?terminate@@YAXXZ") | |||
3481 | ? C.Idents.get("terminate") | |||
3482 | : C.Idents.get(Name); | |||
3483 | ||||
3484 | for (const auto &N : {"__cxxabiv1", "std"}) { | |||
3485 | IdentifierInfo &NS = C.Idents.get(N); | |||
3486 | for (const auto &Result : DC->lookup(&NS)) { | |||
3487 | NamespaceDecl *ND = dyn_cast<NamespaceDecl>(Result); | |||
3488 | if (auto LSD = dyn_cast<LinkageSpecDecl>(Result)) | |||
3489 | for (const auto &Result : LSD->lookup(&NS)) | |||
3490 | if ((ND = dyn_cast<NamespaceDecl>(Result))) | |||
3491 | break; | |||
3492 | ||||
3493 | if (ND) | |||
3494 | for (const auto &Result : ND->lookup(&CXXII)) | |||
3495 | if (const auto *FD = dyn_cast<FunctionDecl>(Result)) | |||
3496 | return FD; | |||
3497 | } | |||
3498 | } | |||
3499 | ||||
3500 | return nullptr; | |||
3501 | } | |||
3502 | ||||
3503 | /// CreateRuntimeFunction - Create a new runtime function with the specified | |||
3504 | /// type and name. | |||
3505 | llvm::FunctionCallee | |||
3506 | CodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, StringRef Name, | |||
3507 | llvm::AttributeList ExtraAttrs, bool Local, | |||
3508 | bool AssumeConvergent) { | |||
3509 | if (AssumeConvergent) { | |||
3510 | ExtraAttrs = | |||
3511 | ExtraAttrs.addAttribute(VMContext, llvm::AttributeList::FunctionIndex, | |||
3512 | llvm::Attribute::Convergent); | |||
3513 | } | |||
3514 | ||||
3515 | llvm::Constant *C = | |||
3516 | GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, | |||
3517 | /*DontDefer=*/false, /*IsThunk=*/false, | |||
3518 | ExtraAttrs); | |||
3519 | ||||
3520 | if (auto *F = dyn_cast<llvm::Function>(C)) { | |||
3521 | if (F->empty()) { | |||
3522 | F->setCallingConv(getRuntimeCC()); | |||
3523 | ||||
3524 | // In Windows Itanium environments, try to mark runtime functions | |||
3525 | // dllimport. For Mingw and MSVC, don't. We don't really know if the user | |||
3526 | // will link their standard library statically or dynamically. Marking | |||
3527 | // functions imported when they are not imported can cause linker errors | |||
3528 | // and warnings. | |||
3529 | if (!Local && getTriple().isWindowsItaniumEnvironment() && | |||
3530 | !getCodeGenOpts().LTOVisibilityPublicStd) { | |||
3531 | const FunctionDecl *FD = GetRuntimeFunctionDecl(Context, Name); | |||
3532 | if (!FD || FD->hasAttr<DLLImportAttr>()) { | |||
3533 | F->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); | |||
3534 | F->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
3535 | } | |||
3536 | } | |||
3537 | setDSOLocal(F); | |||
3538 | } | |||
3539 | } | |||
3540 | ||||
3541 | return {FTy, C}; | |||
3542 | } | |||
3543 | ||||
3544 | /// isTypeConstant - Determine whether an object of this type can be emitted | |||
3545 | /// as a constant. | |||
3546 | /// | |||
3547 | /// If ExcludeCtor is true, the duration when the object's constructor runs | |||
3548 | /// will not be considered. The caller will need to verify that the object is | |||
3549 | /// not written to during its construction. | |||
3550 | bool CodeGenModule::isTypeConstant(QualType Ty, bool ExcludeCtor) { | |||
3551 | if (!Ty.isConstant(Context) && !Ty->isReferenceType()) | |||
3552 | return false; | |||
3553 | ||||
3554 | if (Context.getLangOpts().CPlusPlus) { | |||
3555 | if (const CXXRecordDecl *Record | |||
3556 | = Context.getBaseElementType(Ty)->getAsCXXRecordDecl()) | |||
3557 | return ExcludeCtor && !Record->hasMutableFields() && | |||
3558 | Record->hasTrivialDestructor(); | |||
3559 | } | |||
3560 | ||||
3561 | return true; | |||
3562 | } | |||
3563 | ||||
3564 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, | |||
3565 | /// create and return an llvm GlobalVariable with the specified type. If there | |||
3566 | /// is something in the module with the specified name, return it potentially | |||
3567 | /// bitcasted to the right type. | |||
3568 | /// | |||
3569 | /// If D is non-null, it specifies a decl that correspond to this. This is used | |||
3570 | /// to set the attributes on the global when it is first created. | |||
3571 | /// | |||
3572 | /// If IsForDefinition is true, it is guaranteed that an actual global with | |||
3573 | /// type Ty will be returned, not conversion of a variable with the same | |||
3574 | /// mangled name but some other type. | |||
3575 | llvm::Constant * | |||
3576 | CodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, | |||
3577 | llvm::PointerType *Ty, | |||
3578 | const VarDecl *D, | |||
3579 | ForDefinition_t IsForDefinition) { | |||
3580 | // Lookup the entry, lazily creating it if necessary. | |||
3581 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
3582 | if (Entry) { | |||
3583 | if (WeakRefReferences.erase(Entry)) { | |||
3584 | if (D && !D->hasAttr<WeakAttr>()) | |||
3585 | Entry->setLinkage(llvm::Function::ExternalLinkage); | |||
3586 | } | |||
3587 | ||||
3588 | // Handle dropped DLL attributes. | |||
3589 | if (D && !D->hasAttr<DLLImportAttr>() && !D->hasAttr<DLLExportAttr>()) | |||
3590 | Entry->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
3591 | ||||
3592 | if (LangOpts.OpenMP && !LangOpts.OpenMPSimd && D) | |||
3593 | getOpenMPRuntime().registerTargetGlobalVariable(D, Entry); | |||
3594 | ||||
3595 | if (Entry->getType() == Ty) | |||
3596 | return Entry; | |||
3597 | ||||
3598 | // If there are two attempts to define the same mangled name, issue an | |||
3599 | // error. | |||
3600 | if (IsForDefinition && !Entry->isDeclaration()) { | |||
3601 | GlobalDecl OtherGD; | |||
3602 | const VarDecl *OtherD; | |||
3603 | ||||
3604 | // Check that D is not yet in DiagnosedConflictingDefinitions is required | |||
3605 | // to make sure that we issue an error only once. | |||
3606 | if (D && lookupRepresentativeDecl(MangledName, OtherGD) && | |||
3607 | (D->getCanonicalDecl() != OtherGD.getCanonicalDecl().getDecl()) && | |||
3608 | (OtherD = dyn_cast<VarDecl>(OtherGD.getDecl())) && | |||
3609 | OtherD->hasInit() && | |||
3610 | DiagnosedConflictingDefinitions.insert(D).second) { | |||
3611 | getDiags().Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
3612 | << MangledName; | |||
3613 | getDiags().Report(OtherGD.getDecl()->getLocation(), | |||
3614 | diag::note_previous_definition); | |||
3615 | } | |||
3616 | } | |||
3617 | ||||
3618 | // Make sure the result is of the correct type. | |||
3619 | if (Entry->getType()->getAddressSpace() != Ty->getAddressSpace()) | |||
3620 | return llvm::ConstantExpr::getAddrSpaceCast(Entry, Ty); | |||
3621 | ||||
3622 | // (If global is requested for a definition, we always need to create a new | |||
3623 | // global, not just return a bitcast.) | |||
3624 | if (!IsForDefinition) | |||
3625 | return llvm::ConstantExpr::getBitCast(Entry, Ty); | |||
3626 | } | |||
3627 | ||||
3628 | auto AddrSpace = GetGlobalVarAddressSpace(D); | |||
3629 | auto TargetAddrSpace = getContext().getTargetAddressSpace(AddrSpace); | |||
3630 | ||||
3631 | auto *GV = new llvm::GlobalVariable( | |||
3632 | getModule(), Ty->getElementType(), false, | |||
3633 | llvm::GlobalValue::ExternalLinkage, nullptr, MangledName, nullptr, | |||
3634 | llvm::GlobalVariable::NotThreadLocal, TargetAddrSpace); | |||
3635 | ||||
3636 | // If we already created a global with the same mangled name (but different | |||
3637 | // type) before, take its name and remove it from its parent. | |||
3638 | if (Entry) { | |||
3639 | GV->takeName(Entry); | |||
3640 | ||||
3641 | if (!Entry->use_empty()) { | |||
3642 | llvm::Constant *NewPtrForOldDecl = | |||
3643 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); | |||
3644 | Entry->replaceAllUsesWith(NewPtrForOldDecl); | |||
3645 | } | |||
3646 | ||||
3647 | Entry->eraseFromParent(); | |||
3648 | } | |||
3649 | ||||
3650 | // This is the first use or definition of a mangled name. If there is a | |||
3651 | // deferred decl with this name, remember that we need to emit it at the end | |||
3652 | // of the file. | |||
3653 | auto DDI = DeferredDecls.find(MangledName); | |||
3654 | if (DDI != DeferredDecls.end()) { | |||
3655 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit | |||
3656 | // list, and remove it from DeferredDecls (since we don't need it anymore). | |||
3657 | addDeferredDeclToEmit(DDI->second); | |||
3658 | DeferredDecls.erase(DDI); | |||
3659 | } | |||
3660 | ||||
3661 | // Handle things which are present even on external declarations. | |||
3662 | if (D) { | |||
3663 | if (LangOpts.OpenMP && !LangOpts.OpenMPSimd) | |||
3664 | getOpenMPRuntime().registerTargetGlobalVariable(D, GV); | |||
3665 | ||||
3666 | // FIXME: This code is overly simple and should be merged with other global | |||
3667 | // handling. | |||
3668 | GV->setConstant(isTypeConstant(D->getType(), false)); | |||
3669 | ||||
3670 | GV->setAlignment(getContext().getDeclAlign(D).getAsAlign()); | |||
3671 | ||||
3672 | setLinkageForGV(GV, D); | |||
3673 | ||||
3674 | if (D->getTLSKind()) { | |||
3675 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) | |||
3676 | CXXThreadLocals.push_back(D); | |||
3677 | setTLSMode(GV, *D); | |||
3678 | } | |||
3679 | ||||
3680 | setGVProperties(GV, D); | |||
3681 | ||||
3682 | // If required by the ABI, treat declarations of static data members with | |||
3683 | // inline initializers as definitions. | |||
3684 | if (getContext().isMSStaticDataMemberInlineDefinition(D)) { | |||
3685 | EmitGlobalVarDefinition(D); | |||
3686 | } | |||
3687 | ||||
3688 | // Emit section information for extern variables. | |||
3689 | if (D->hasExternalStorage()) { | |||
3690 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) | |||
3691 | GV->setSection(SA->getName()); | |||
3692 | } | |||
3693 | ||||
3694 | // Handle XCore specific ABI requirements. | |||
3695 | if (getTriple().getArch() == llvm::Triple::xcore && | |||
3696 | D->getLanguageLinkage() == CLanguageLinkage && | |||
3697 | D->getType().isConstant(Context) && | |||
3698 | isExternallyVisible(D->getLinkageAndVisibility().getLinkage())) | |||
3699 | GV->setSection(".cp.rodata"); | |||
3700 | ||||
3701 | // Check if we a have a const declaration with an initializer, we may be | |||
3702 | // able to emit it as available_externally to expose it's value to the | |||
3703 | // optimizer. | |||
3704 | if (Context.getLangOpts().CPlusPlus && GV->hasExternalLinkage() && | |||
3705 | D->getType().isConstQualified() && !GV->hasInitializer() && | |||
3706 | !D->hasDefinition() && D->hasInit() && !D->hasAttr<DLLImportAttr>()) { | |||
3707 | const auto *Record = | |||
3708 | Context.getBaseElementType(D->getType())->getAsCXXRecordDecl(); | |||
3709 | bool HasMutableFields = Record && Record->hasMutableFields(); | |||
3710 | if (!HasMutableFields) { | |||
3711 | const VarDecl *InitDecl; | |||
3712 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); | |||
3713 | if (InitExpr) { | |||
3714 | ConstantEmitter emitter(*this); | |||
3715 | llvm::Constant *Init = emitter.tryEmitForInitializer(*InitDecl); | |||
3716 | if (Init) { | |||
3717 | auto *InitType = Init->getType(); | |||
3718 | if (GV->getValueType() != InitType) { | |||
3719 | // The type of the initializer does not match the definition. | |||
3720 | // This happens when an initializer has a different type from | |||
3721 | // the type of the global (because of padding at the end of a | |||
3722 | // structure for instance). | |||
3723 | GV->setName(StringRef()); | |||
3724 | // Make a new global with the correct type, this is now guaranteed | |||
3725 | // to work. | |||
3726 | auto *NewGV = cast<llvm::GlobalVariable>( | |||
3727 | GetAddrOfGlobalVar(D, InitType, IsForDefinition) | |||
3728 | ->stripPointerCasts()); | |||
3729 | ||||
3730 | // Erase the old global, since it is no longer used. | |||
3731 | GV->eraseFromParent(); | |||
3732 | GV = NewGV; | |||
3733 | } else { | |||
3734 | GV->setInitializer(Init); | |||
3735 | GV->setConstant(true); | |||
3736 | GV->setLinkage(llvm::GlobalValue::AvailableExternallyLinkage); | |||
3737 | } | |||
3738 | emitter.finalize(GV); | |||
3739 | } | |||
3740 | } | |||
3741 | } | |||
3742 | } | |||
3743 | } | |||
3744 | ||||
3745 | if (GV->isDeclaration()) | |||
3746 | getTargetCodeGenInfo().setTargetAttributes(D, GV, *this); | |||
3747 | ||||
3748 | LangAS ExpectedAS = | |||
3749 | D ? D->getType().getAddressSpace() | |||
3750 | : (LangOpts.OpenCL ? LangAS::opencl_global : LangAS::Default); | |||
3751 | assert(getContext().getTargetAddressSpace(ExpectedAS) ==((getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace ()) ? static_cast<void> (0) : __assert_fail ("getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace()" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3752, __PRETTY_FUNCTION__)) | |||
3752 | Ty->getPointerAddressSpace())((getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace ()) ? static_cast<void> (0) : __assert_fail ("getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace()" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3752, __PRETTY_FUNCTION__)); | |||
3753 | if (AddrSpace != ExpectedAS) | |||
3754 | return getTargetCodeGenInfo().performAddrSpaceCast(*this, GV, AddrSpace, | |||
3755 | ExpectedAS, Ty); | |||
3756 | ||||
3757 | return GV; | |||
3758 | } | |||
3759 | ||||
3760 | llvm::Constant * | |||
3761 | CodeGenModule::GetAddrOfGlobal(GlobalDecl GD, ForDefinition_t IsForDefinition) { | |||
3762 | const Decl *D = GD.getDecl(); | |||
3763 | ||||
3764 | if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) | |||
3765 | return getAddrOfCXXStructor(GD, /*FnInfo=*/nullptr, /*FnType=*/nullptr, | |||
3766 | /*DontDefer=*/false, IsForDefinition); | |||
3767 | ||||
3768 | if (isa<CXXMethodDecl>(D)) { | |||
3769 | auto FInfo = | |||
3770 | &getTypes().arrangeCXXMethodDeclaration(cast<CXXMethodDecl>(D)); | |||
3771 | auto Ty = getTypes().GetFunctionType(*FInfo); | |||
3772 | return GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, /*DontDefer=*/false, | |||
3773 | IsForDefinition); | |||
3774 | } | |||
3775 | ||||
3776 | if (isa<FunctionDecl>(D)) { | |||
3777 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
3778 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
3779 | return GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, /*DontDefer=*/false, | |||
3780 | IsForDefinition); | |||
3781 | } | |||
3782 | ||||
3783 | return GetAddrOfGlobalVar(cast<VarDecl>(D), /*Ty=*/nullptr, IsForDefinition); | |||
3784 | } | |||
3785 | ||||
3786 | llvm::GlobalVariable *CodeGenModule::CreateOrReplaceCXXRuntimeVariable( | |||
3787 | StringRef Name, llvm::Type *Ty, llvm::GlobalValue::LinkageTypes Linkage, | |||
3788 | unsigned Alignment) { | |||
3789 | llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); | |||
3790 | llvm::GlobalVariable *OldGV = nullptr; | |||
3791 | ||||
3792 | if (GV) { | |||
3793 | // Check if the variable has the right type. | |||
3794 | if (GV->getValueType() == Ty) | |||
3795 | return GV; | |||
3796 | ||||
3797 | // Because C++ name mangling, the only way we can end up with an already | |||
3798 | // existing global with the same name is if it has been declared extern "C". | |||
3799 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3799, __PRETTY_FUNCTION__)); | |||
3800 | OldGV = GV; | |||
3801 | } | |||
3802 | ||||
3803 | // Create a new variable. | |||
3804 | GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, | |||
3805 | Linkage, nullptr, Name); | |||
3806 | ||||
3807 | if (OldGV) { | |||
3808 | // Replace occurrences of the old variable if needed. | |||
3809 | GV->takeName(OldGV); | |||
3810 | ||||
3811 | if (!OldGV->use_empty()) { | |||
3812 | llvm::Constant *NewPtrForOldDecl = | |||
3813 | llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); | |||
3814 | OldGV->replaceAllUsesWith(NewPtrForOldDecl); | |||
3815 | } | |||
3816 | ||||
3817 | OldGV->eraseFromParent(); | |||
3818 | } | |||
3819 | ||||
3820 | if (supportsCOMDAT() && GV->isWeakForLinker() && | |||
3821 | !GV->hasAvailableExternallyLinkage()) | |||
3822 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
3823 | ||||
3824 | GV->setAlignment(llvm::MaybeAlign(Alignment)); | |||
3825 | ||||
3826 | return GV; | |||
3827 | } | |||
3828 | ||||
3829 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the | |||
3830 | /// given global variable. If Ty is non-null and if the global doesn't exist, | |||
3831 | /// then it will be created with the specified type instead of whatever the | |||
3832 | /// normal requested type would be. If IsForDefinition is true, it is guaranteed | |||
3833 | /// that an actual global with type Ty will be returned, not conversion of a | |||
3834 | /// variable with the same mangled name but some other type. | |||
3835 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, | |||
3836 | llvm::Type *Ty, | |||
3837 | ForDefinition_t IsForDefinition) { | |||
3838 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3838, __PRETTY_FUNCTION__)); | |||
3839 | QualType ASTTy = D->getType(); | |||
3840 | if (!Ty) | |||
3841 | Ty = getTypes().ConvertTypeForMem(ASTTy); | |||
3842 | ||||
3843 | llvm::PointerType *PTy = | |||
3844 | llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); | |||
3845 | ||||
3846 | StringRef MangledName = getMangledName(D); | |||
3847 | return GetOrCreateLLVMGlobal(MangledName, PTy, D, IsForDefinition); | |||
3848 | } | |||
3849 | ||||
3850 | /// CreateRuntimeVariable - Create a new runtime global variable with the | |||
3851 | /// specified type and name. | |||
3852 | llvm::Constant * | |||
3853 | CodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, | |||
3854 | StringRef Name) { | |||
3855 | auto PtrTy = | |||
3856 | getContext().getLangOpts().OpenCL | |||
3857 | ? llvm::PointerType::get( | |||
3858 | Ty, getContext().getTargetAddressSpace(LangAS::opencl_global)) | |||
3859 | : llvm::PointerType::getUnqual(Ty); | |||
3860 | auto *Ret = GetOrCreateLLVMGlobal(Name, PtrTy, nullptr); | |||
3861 | setDSOLocal(cast<llvm::GlobalValue>(Ret->stripPointerCasts())); | |||
3862 | return Ret; | |||
3863 | } | |||
3864 | ||||
3865 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { | |||
3866 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3866, __PRETTY_FUNCTION__)); | |||
3867 | ||||
3868 | StringRef MangledName = getMangledName(D); | |||
3869 | llvm::GlobalValue *GV = GetGlobalValue(MangledName); | |||
3870 | ||||
3871 | // We already have a definition, not declaration, with the same mangled name. | |||
3872 | // Emitting of declaration is not required (and actually overwrites emitted | |||
3873 | // definition). | |||
3874 | if (GV && !GV->isDeclaration()) | |||
3875 | return; | |||
3876 | ||||
3877 | // If we have not seen a reference to this variable yet, place it into the | |||
3878 | // deferred declarations table to be emitted if needed later. | |||
3879 | if (!MustBeEmitted(D) && !GV) { | |||
3880 | DeferredDecls[MangledName] = D; | |||
3881 | return; | |||
3882 | } | |||
3883 | ||||
3884 | // The tentative definition is the only definition. | |||
3885 | EmitGlobalVarDefinition(D); | |||
3886 | } | |||
3887 | ||||
3888 | void CodeGenModule::EmitExternalDeclaration(const VarDecl *D) { | |||
3889 | EmitExternalVarDeclaration(D); | |||
3890 | } | |||
3891 | ||||
3892 | CharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { | |||
3893 | return Context.toCharUnitsFromBits( | |||
3894 | getDataLayout().getTypeStoreSizeInBits(Ty)); | |||
3895 | } | |||
3896 | ||||
3897 | LangAS CodeGenModule::GetGlobalVarAddressSpace(const VarDecl *D) { | |||
3898 | LangAS AddrSpace = LangAS::Default; | |||
3899 | if (LangOpts.OpenCL) { | |||
3900 | AddrSpace = D ? D->getType().getAddressSpace() : LangAS::opencl_global; | |||
3901 | assert(AddrSpace == LangAS::opencl_global ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS ::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace ) ? static_cast<void> (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3906, __PRETTY_FUNCTION__)) | |||
3902 | AddrSpace == LangAS::opencl_global_device ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS ::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace ) ? static_cast<void> (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3906, __PRETTY_FUNCTION__)) | |||
3903 | AddrSpace == LangAS::opencl_global_host ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS ::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace ) ? static_cast<void> (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3906, __PRETTY_FUNCTION__)) | |||
3904 | AddrSpace == LangAS::opencl_constant ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS ::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace ) ? static_cast<void> (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3906, __PRETTY_FUNCTION__)) | |||
3905 | AddrSpace == LangAS::opencl_local ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS ::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace ) ? static_cast<void> (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3906, __PRETTY_FUNCTION__)) | |||
3906 | AddrSpace >= LangAS::FirstTargetAddressSpace)((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS ::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace ) ? static_cast<void> (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_global_device || AddrSpace == LangAS::opencl_global_host || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 3906, __PRETTY_FUNCTION__)); | |||
3907 | return AddrSpace; | |||
3908 | } | |||
3909 | ||||
3910 | if (LangOpts.CUDA && LangOpts.CUDAIsDevice) { | |||
3911 | if (D && D->hasAttr<CUDAConstantAttr>()) | |||
3912 | return LangAS::cuda_constant; | |||
3913 | else if (D && D->hasAttr<CUDASharedAttr>()) | |||
3914 | return LangAS::cuda_shared; | |||
3915 | else if (D && D->hasAttr<CUDADeviceAttr>()) | |||
3916 | return LangAS::cuda_device; | |||
3917 | else if (D && D->getType().isConstQualified()) | |||
3918 | return LangAS::cuda_constant; | |||
3919 | else | |||
3920 | return LangAS::cuda_device; | |||
3921 | } | |||
3922 | ||||
3923 | if (LangOpts.OpenMP) { | |||
3924 | LangAS AS; | |||
3925 | if (OpenMPRuntime->hasAllocateAttributeForGlobalVar(D, AS)) | |||
3926 | return AS; | |||
3927 | } | |||
3928 | return getTargetCodeGenInfo().getGlobalVarAddressSpace(*this, D); | |||
3929 | } | |||
3930 | ||||
3931 | LangAS CodeGenModule::getStringLiteralAddressSpace() const { | |||
3932 | // OpenCL v1.2 s6.5.3: a string literal is in the constant address space. | |||
3933 | if (LangOpts.OpenCL) | |||
3934 | return LangAS::opencl_constant; | |||
3935 | if (auto AS = getTarget().getConstantAddressSpace()) | |||
3936 | return AS.getValue(); | |||
3937 | return LangAS::Default; | |||
3938 | } | |||
3939 | ||||
3940 | // In address space agnostic languages, string literals are in default address | |||
3941 | // space in AST. However, certain targets (e.g. amdgcn) request them to be | |||
3942 | // emitted in constant address space in LLVM IR. To be consistent with other | |||
3943 | // parts of AST, string literal global variables in constant address space | |||
3944 | // need to be casted to default address space before being put into address | |||
3945 | // map and referenced by other part of CodeGen. | |||
3946 | // In OpenCL, string literals are in constant address space in AST, therefore | |||
3947 | // they should not be casted to default address space. | |||
3948 | static llvm::Constant * | |||
3949 | castStringLiteralToDefaultAddressSpace(CodeGenModule &CGM, | |||
3950 | llvm::GlobalVariable *GV) { | |||
3951 | llvm::Constant *Cast = GV; | |||
3952 | if (!CGM.getLangOpts().OpenCL) { | |||
3953 | if (auto AS = CGM.getTarget().getConstantAddressSpace()) { | |||
3954 | if (AS != LangAS::Default) | |||
3955 | Cast = CGM.getTargetCodeGenInfo().performAddrSpaceCast( | |||
3956 | CGM, GV, AS.getValue(), LangAS::Default, | |||
3957 | GV->getValueType()->getPointerTo( | |||
3958 | CGM.getContext().getTargetAddressSpace(LangAS::Default))); | |||
3959 | } | |||
3960 | } | |||
3961 | return Cast; | |||
3962 | } | |||
3963 | ||||
3964 | template<typename SomeDecl> | |||
3965 | void CodeGenModule::MaybeHandleStaticInExternC(const SomeDecl *D, | |||
3966 | llvm::GlobalValue *GV) { | |||
3967 | if (!getLangOpts().CPlusPlus) | |||
3968 | return; | |||
3969 | ||||
3970 | // Must have 'used' attribute, or else inline assembly can't rely on | |||
3971 | // the name existing. | |||
3972 | if (!D->template hasAttr<UsedAttr>()) | |||
3973 | return; | |||
3974 | ||||
3975 | // Must have internal linkage and an ordinary name. | |||
3976 | if (!D->getIdentifier() || D->getFormalLinkage() != InternalLinkage) | |||
3977 | return; | |||
3978 | ||||
3979 | // Must be in an extern "C" context. Entities declared directly within | |||
3980 | // a record are not extern "C" even if the record is in such a context. | |||
3981 | const SomeDecl *First = D->getFirstDecl(); | |||
3982 | if (First->getDeclContext()->isRecord() || !First->isInExternCContext()) | |||
3983 | return; | |||
3984 | ||||
3985 | // OK, this is an internal linkage entity inside an extern "C" linkage | |||
3986 | // specification. Make a note of that so we can give it the "expected" | |||
3987 | // mangled name if nothing else is using that name. | |||
3988 | std::pair<StaticExternCMap::iterator, bool> R = | |||
3989 | StaticExternCValues.insert(std::make_pair(D->getIdentifier(), GV)); | |||
3990 | ||||
3991 | // If we have multiple internal linkage entities with the same name | |||
3992 | // in extern "C" regions, none of them gets that name. | |||
3993 | if (!R.second) | |||
3994 | R.first->second = nullptr; | |||
3995 | } | |||
3996 | ||||
3997 | static bool shouldBeInCOMDAT(CodeGenModule &CGM, const Decl &D) { | |||
3998 | if (!CGM.supportsCOMDAT()) | |||
3999 | return false; | |||
4000 | ||||
4001 | // Do not set COMDAT attribute for CUDA/HIP stub functions to prevent | |||
4002 | // them being "merged" by the COMDAT Folding linker optimization. | |||
4003 | if (D.hasAttr<CUDAGlobalAttr>()) | |||
4004 | return false; | |||
4005 | ||||
4006 | if (D.hasAttr<SelectAnyAttr>()) | |||
4007 | return true; | |||
4008 | ||||
4009 | GVALinkage Linkage; | |||
4010 | if (auto *VD = dyn_cast<VarDecl>(&D)) | |||
4011 | Linkage = CGM.getContext().GetGVALinkageForVariable(VD); | |||
4012 | else | |||
4013 | Linkage = CGM.getContext().GetGVALinkageForFunction(cast<FunctionDecl>(&D)); | |||
4014 | ||||
4015 | switch (Linkage) { | |||
4016 | case GVA_Internal: | |||
4017 | case GVA_AvailableExternally: | |||
4018 | case GVA_StrongExternal: | |||
4019 | return false; | |||
4020 | case GVA_DiscardableODR: | |||
4021 | case GVA_StrongODR: | |||
4022 | return true; | |||
4023 | } | |||
4024 | llvm_unreachable("No such linkage")::llvm::llvm_unreachable_internal("No such linkage", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4024); | |||
4025 | } | |||
4026 | ||||
4027 | void CodeGenModule::maybeSetTrivialComdat(const Decl &D, | |||
4028 | llvm::GlobalObject &GO) { | |||
4029 | if (!shouldBeInCOMDAT(*this, D)) | |||
4030 | return; | |||
4031 | GO.setComdat(TheModule.getOrInsertComdat(GO.getName())); | |||
4032 | } | |||
4033 | ||||
4034 | /// Pass IsTentative as true if you want to create a tentative definition. | |||
4035 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D, | |||
4036 | bool IsTentative) { | |||
4037 | // OpenCL global variables of sampler type are translated to function calls, | |||
4038 | // therefore no need to be translated. | |||
4039 | QualType ASTTy = D->getType(); | |||
4040 | if (getLangOpts().OpenCL && ASTTy->isSamplerT()) | |||
4041 | return; | |||
4042 | ||||
4043 | // If this is OpenMP device, check if it is legal to emit this global | |||
4044 | // normally. | |||
4045 | if (LangOpts.OpenMPIsDevice && OpenMPRuntime && | |||
4046 | OpenMPRuntime->emitTargetGlobalVariable(D)) | |||
4047 | return; | |||
4048 | ||||
4049 | llvm::Constant *Init = nullptr; | |||
4050 | bool NeedsGlobalCtor = false; | |||
4051 | bool NeedsGlobalDtor = | |||
4052 | D->needsDestruction(getContext()) == QualType::DK_cxx_destructor; | |||
4053 | ||||
4054 | const VarDecl *InitDecl; | |||
4055 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); | |||
4056 | ||||
4057 | Optional<ConstantEmitter> emitter; | |||
4058 | ||||
4059 | // CUDA E.2.4.1 "__shared__ variables cannot have an initialization | |||
4060 | // as part of their declaration." Sema has already checked for | |||
4061 | // error cases, so we just need to set Init to UndefValue. | |||
4062 | bool IsCUDASharedVar = | |||
4063 | getLangOpts().CUDAIsDevice && D->hasAttr<CUDASharedAttr>(); | |||
4064 | // Shadows of initialized device-side global variables are also left | |||
4065 | // undefined. | |||
4066 | bool IsCUDAShadowVar = | |||
4067 | !getLangOpts().CUDAIsDevice && | |||
4068 | (D->hasAttr<CUDAConstantAttr>() || D->hasAttr<CUDADeviceAttr>() || | |||
4069 | D->hasAttr<CUDASharedAttr>()); | |||
4070 | bool IsCUDADeviceShadowVar = | |||
4071 | getLangOpts().CUDAIsDevice && | |||
4072 | (D->getType()->isCUDADeviceBuiltinSurfaceType() || | |||
4073 | D->getType()->isCUDADeviceBuiltinTextureType()); | |||
4074 | // HIP pinned shadow of initialized host-side global variables are also | |||
4075 | // left undefined. | |||
4076 | if (getLangOpts().CUDA && | |||
4077 | (IsCUDASharedVar || IsCUDAShadowVar || IsCUDADeviceShadowVar)) | |||
4078 | Init = llvm::UndefValue::get(getTypes().ConvertType(ASTTy)); | |||
4079 | else if (D->hasAttr<LoaderUninitializedAttr>()) | |||
4080 | Init = llvm::UndefValue::get(getTypes().ConvertType(ASTTy)); | |||
4081 | else if (!InitExpr) { | |||
4082 | // This is a tentative definition; tentative definitions are | |||
4083 | // implicitly initialized with { 0 }. | |||
4084 | // | |||
4085 | // Note that tentative definitions are only emitted at the end of | |||
4086 | // a translation unit, so they should never have incomplete | |||
4087 | // type. In addition, EmitTentativeDefinition makes sure that we | |||
4088 | // never attempt to emit a tentative definition if a real one | |||
4089 | // exists. A use may still exists, however, so we still may need | |||
4090 | // to do a RAUW. | |||
4091 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4091, __PRETTY_FUNCTION__)); | |||
4092 | Init = EmitNullConstant(D->getType()); | |||
4093 | } else { | |||
4094 | initializedGlobalDecl = GlobalDecl(D); | |||
4095 | emitter.emplace(*this); | |||
4096 | Init = emitter->tryEmitForInitializer(*InitDecl); | |||
4097 | ||||
4098 | if (!Init) { | |||
4099 | QualType T = InitExpr->getType(); | |||
4100 | if (D->getType()->isReferenceType()) | |||
4101 | T = D->getType(); | |||
4102 | ||||
4103 | if (getLangOpts().CPlusPlus) { | |||
4104 | Init = EmitNullConstant(T); | |||
4105 | NeedsGlobalCtor = true; | |||
4106 | } else { | |||
4107 | ErrorUnsupported(D, "static initializer"); | |||
4108 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); | |||
4109 | } | |||
4110 | } else { | |||
4111 | // We don't need an initializer, so remove the entry for the delayed | |||
4112 | // initializer position (just in case this entry was delayed) if we | |||
4113 | // also don't need to register a destructor. | |||
4114 | if (getLangOpts().CPlusPlus && !NeedsGlobalDtor) | |||
4115 | DelayedCXXInitPosition.erase(D); | |||
4116 | } | |||
4117 | } | |||
4118 | ||||
4119 | llvm::Type* InitType = Init->getType(); | |||
4120 | llvm::Constant *Entry = | |||
4121 | GetAddrOfGlobalVar(D, InitType, ForDefinition_t(!IsTentative)); | |||
4122 | ||||
4123 | // Strip off pointer casts if we got them. | |||
4124 | Entry = Entry->stripPointerCasts(); | |||
4125 | ||||
4126 | // Entry is now either a Function or GlobalVariable. | |||
4127 | auto *GV = dyn_cast<llvm::GlobalVariable>(Entry); | |||
4128 | ||||
4129 | // We have a definition after a declaration with the wrong type. | |||
4130 | // We must make a new GlobalVariable* and update everything that used OldGV | |||
4131 | // (a declaration or tentative definition) with the new GlobalVariable* | |||
4132 | // (which will be a definition). | |||
4133 | // | |||
4134 | // This happens if there is a prototype for a global (e.g. | |||
4135 | // "extern int x[];") and then a definition of a different type (e.g. | |||
4136 | // "int x[10];"). This also happens when an initializer has a different type | |||
4137 | // from the type of the global (this happens with unions). | |||
4138 | if (!GV || GV->getValueType() != InitType || | |||
4139 | GV->getType()->getAddressSpace() != | |||
4140 | getContext().getTargetAddressSpace(GetGlobalVarAddressSpace(D))) { | |||
4141 | ||||
4142 | // Move the old entry aside so that we'll create a new one. | |||
4143 | Entry->setName(StringRef()); | |||
4144 | ||||
4145 | // Make a new global with the correct type, this is now guaranteed to work. | |||
4146 | GV = cast<llvm::GlobalVariable>( | |||
4147 | GetAddrOfGlobalVar(D, InitType, ForDefinition_t(!IsTentative)) | |||
4148 | ->stripPointerCasts()); | |||
4149 | ||||
4150 | // Replace all uses of the old global with the new global | |||
4151 | llvm::Constant *NewPtrForOldDecl = | |||
4152 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); | |||
4153 | Entry->replaceAllUsesWith(NewPtrForOldDecl); | |||
4154 | ||||
4155 | // Erase the old global, since it is no longer used. | |||
4156 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); | |||
4157 | } | |||
4158 | ||||
4159 | MaybeHandleStaticInExternC(D, GV); | |||
4160 | ||||
4161 | if (D->hasAttr<AnnotateAttr>()) | |||
4162 | AddGlobalAnnotations(D, GV); | |||
4163 | ||||
4164 | // Set the llvm linkage type as appropriate. | |||
4165 | llvm::GlobalValue::LinkageTypes Linkage = | |||
4166 | getLLVMLinkageVarDefinition(D, GV->isConstant()); | |||
4167 | ||||
4168 | // CUDA B.2.1 "The __device__ qualifier declares a variable that resides on | |||
4169 | // the device. [...]" | |||
4170 | // CUDA B.2.2 "The __constant__ qualifier, optionally used together with | |||
4171 | // __device__, declares a variable that: [...] | |||
4172 | // Is accessible from all the threads within the grid and from the host | |||
4173 | // through the runtime library (cudaGetSymbolAddress() / cudaGetSymbolSize() | |||
4174 | // / cudaMemcpyToSymbol() / cudaMemcpyFromSymbol())." | |||
4175 | if (GV && LangOpts.CUDA) { | |||
4176 | if (LangOpts.CUDAIsDevice) { | |||
4177 | if (Linkage != llvm::GlobalValue::InternalLinkage && | |||
4178 | (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>())) | |||
4179 | GV->setExternallyInitialized(true); | |||
4180 | } else { | |||
4181 | // Host-side shadows of external declarations of device-side | |||
4182 | // global variables become internal definitions. These have to | |||
4183 | // be internal in order to prevent name conflicts with global | |||
4184 | // host variables with the same name in a different TUs. | |||
4185 | if (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>()) { | |||
4186 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4187 | // Shadow variables and their properties must be registered with CUDA | |||
4188 | // runtime. Skip Extern global variables, which will be registered in | |||
4189 | // the TU where they are defined. | |||
4190 | // | |||
4191 | // Don't register a C++17 inline variable. The local symbol can be | |||
4192 | // discarded and referencing a discarded local symbol from outside the | |||
4193 | // comdat (__cuda_register_globals) is disallowed by the ELF spec. | |||
4194 | // TODO: Reject __device__ constexpr and __device__ inline in Sema. | |||
4195 | if (!D->hasExternalStorage() && !D->isInline()) | |||
4196 | getCUDARuntime().registerDeviceVar(D, *GV, !D->hasDefinition(), | |||
4197 | D->hasAttr<CUDAConstantAttr>()); | |||
4198 | } else if (D->hasAttr<CUDASharedAttr>()) { | |||
4199 | // __shared__ variables are odd. Shadows do get created, but | |||
4200 | // they are not registered with the CUDA runtime, so they | |||
4201 | // can't really be used to access their device-side | |||
4202 | // counterparts. It's not clear yet whether it's nvcc's bug or | |||
4203 | // a feature, but we've got to do the same for compatibility. | |||
4204 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4205 | } else if (D->getType()->isCUDADeviceBuiltinSurfaceType() || | |||
4206 | D->getType()->isCUDADeviceBuiltinTextureType()) { | |||
4207 | // Builtin surfaces and textures and their template arguments are | |||
4208 | // also registered with CUDA runtime. | |||
4209 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4210 | const ClassTemplateSpecializationDecl *TD = | |||
4211 | cast<ClassTemplateSpecializationDecl>( | |||
4212 | D->getType()->getAs<RecordType>()->getDecl()); | |||
4213 | const TemplateArgumentList &Args = TD->getTemplateArgs(); | |||
4214 | if (TD->hasAttr<CUDADeviceBuiltinSurfaceTypeAttr>()) { | |||
4215 | assert(Args.size() == 2 &&((Args.size() == 2 && "Unexpected number of template arguments of CUDA device " "builtin surface type.") ? static_cast<void> (0) : __assert_fail ("Args.size() == 2 && \"Unexpected number of template arguments of CUDA device \" \"builtin surface type.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4217, __PRETTY_FUNCTION__)) | |||
4216 | "Unexpected number of template arguments of CUDA device "((Args.size() == 2 && "Unexpected number of template arguments of CUDA device " "builtin surface type.") ? static_cast<void> (0) : __assert_fail ("Args.size() == 2 && \"Unexpected number of template arguments of CUDA device \" \"builtin surface type.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4217, __PRETTY_FUNCTION__)) | |||
4217 | "builtin surface type.")((Args.size() == 2 && "Unexpected number of template arguments of CUDA device " "builtin surface type.") ? static_cast<void> (0) : __assert_fail ("Args.size() == 2 && \"Unexpected number of template arguments of CUDA device \" \"builtin surface type.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4217, __PRETTY_FUNCTION__)); | |||
4218 | auto SurfType = Args[1].getAsIntegral(); | |||
4219 | if (!D->hasExternalStorage()) | |||
4220 | getCUDARuntime().registerDeviceSurf(D, *GV, !D->hasDefinition(), | |||
4221 | SurfType.getSExtValue()); | |||
4222 | } else { | |||
4223 | assert(Args.size() == 3 &&((Args.size() == 3 && "Unexpected number of template arguments of CUDA device " "builtin texture type.") ? static_cast<void> (0) : __assert_fail ("Args.size() == 3 && \"Unexpected number of template arguments of CUDA device \" \"builtin texture type.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4225, __PRETTY_FUNCTION__)) | |||
4224 | "Unexpected number of template arguments of CUDA device "((Args.size() == 3 && "Unexpected number of template arguments of CUDA device " "builtin texture type.") ? static_cast<void> (0) : __assert_fail ("Args.size() == 3 && \"Unexpected number of template arguments of CUDA device \" \"builtin texture type.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4225, __PRETTY_FUNCTION__)) | |||
4225 | "builtin texture type.")((Args.size() == 3 && "Unexpected number of template arguments of CUDA device " "builtin texture type.") ? static_cast<void> (0) : __assert_fail ("Args.size() == 3 && \"Unexpected number of template arguments of CUDA device \" \"builtin texture type.\"" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4225, __PRETTY_FUNCTION__)); | |||
4226 | auto TexType = Args[1].getAsIntegral(); | |||
4227 | auto Normalized = Args[2].getAsIntegral(); | |||
4228 | if (!D->hasExternalStorage()) | |||
4229 | getCUDARuntime().registerDeviceTex(D, *GV, !D->hasDefinition(), | |||
4230 | TexType.getSExtValue(), | |||
4231 | Normalized.getZExtValue()); | |||
4232 | } | |||
4233 | } | |||
4234 | } | |||
4235 | } | |||
4236 | ||||
4237 | GV->setInitializer(Init); | |||
4238 | if (emitter) | |||
4239 | emitter->finalize(GV); | |||
4240 | ||||
4241 | // If it is safe to mark the global 'constant', do so now. | |||
4242 | GV->setConstant(!NeedsGlobalCtor && !NeedsGlobalDtor && | |||
4243 | isTypeConstant(D->getType(), true)); | |||
4244 | ||||
4245 | // If it is in a read-only section, mark it 'constant'. | |||
4246 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) { | |||
4247 | const ASTContext::SectionInfo &SI = Context.SectionInfos[SA->getName()]; | |||
4248 | if ((SI.SectionFlags & ASTContext::PSF_Write) == 0) | |||
4249 | GV->setConstant(true); | |||
4250 | } | |||
4251 | ||||
4252 | GV->setAlignment(getContext().getDeclAlign(D).getAsAlign()); | |||
4253 | ||||
4254 | // On Darwin, unlike other Itanium C++ ABI platforms, the thread-wrapper | |||
4255 | // function is only defined alongside the variable, not also alongside | |||
4256 | // callers. Normally, all accesses to a thread_local go through the | |||
4257 | // thread-wrapper in order to ensure initialization has occurred, underlying | |||
4258 | // variable will never be used other than the thread-wrapper, so it can be | |||
4259 | // converted to internal linkage. | |||
4260 | // | |||
4261 | // However, if the variable has the 'constinit' attribute, it _can_ be | |||
4262 | // referenced directly, without calling the thread-wrapper, so the linkage | |||
4263 | // must not be changed. | |||
4264 | // | |||
4265 | // Additionally, if the variable isn't plain external linkage, e.g. if it's | |||
4266 | // weak or linkonce, the de-duplication semantics are important to preserve, | |||
4267 | // so we don't change the linkage. | |||
4268 | if (D->getTLSKind() == VarDecl::TLS_Dynamic && | |||
4269 | Linkage == llvm::GlobalValue::ExternalLinkage && | |||
4270 | Context.getTargetInfo().getTriple().isOSDarwin() && | |||
4271 | !D->hasAttr<ConstInitAttr>()) | |||
4272 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4273 | ||||
4274 | GV->setLinkage(Linkage); | |||
4275 | if (D->hasAttr<DLLImportAttr>()) | |||
4276 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLImportStorageClass); | |||
4277 | else if (D->hasAttr<DLLExportAttr>()) | |||
4278 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLExportStorageClass); | |||
4279 | else | |||
4280 | GV->setDLLStorageClass(llvm::GlobalVariable::DefaultStorageClass); | |||
4281 | ||||
4282 | if (Linkage == llvm::GlobalVariable::CommonLinkage) { | |||
4283 | // common vars aren't constant even if declared const. | |||
4284 | GV->setConstant(false); | |||
4285 | // Tentative definition of global variables may be initialized with | |||
4286 | // non-zero null pointers. In this case they should have weak linkage | |||
4287 | // since common linkage must have zero initializer and must not have | |||
4288 | // explicit section therefore cannot have non-zero initial value. | |||
4289 | if (!GV->getInitializer()->isNullValue()) | |||
4290 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); | |||
4291 | } | |||
4292 | ||||
4293 | setNonAliasAttributes(D, GV); | |||
4294 | ||||
4295 | if (D->getTLSKind() && !GV->isThreadLocal()) { | |||
4296 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) | |||
4297 | CXXThreadLocals.push_back(D); | |||
4298 | setTLSMode(GV, *D); | |||
4299 | } | |||
4300 | ||||
4301 | maybeSetTrivialComdat(*D, *GV); | |||
4302 | ||||
4303 | // Emit the initializer function if necessary. | |||
4304 | if (NeedsGlobalCtor || NeedsGlobalDtor) | |||
4305 | EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor); | |||
4306 | ||||
4307 | SanitizerMD->reportGlobalToASan(GV, *D, NeedsGlobalCtor); | |||
4308 | ||||
4309 | // Emit global variable debug information. | |||
4310 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
4311 | if (getCodeGenOpts().hasReducedDebugInfo()) | |||
4312 | DI->EmitGlobalVariable(GV, D); | |||
4313 | } | |||
4314 | ||||
4315 | void CodeGenModule::EmitExternalVarDeclaration(const VarDecl *D) { | |||
4316 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
4317 | if (getCodeGenOpts().hasReducedDebugInfo()) { | |||
4318 | QualType ASTTy = D->getType(); | |||
4319 | llvm::Type *Ty = getTypes().ConvertTypeForMem(D->getType()); | |||
4320 | llvm::PointerType *PTy = | |||
4321 | llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); | |||
4322 | llvm::Constant *GV = GetOrCreateLLVMGlobal(D->getName(), PTy, D); | |||
4323 | DI->EmitExternalVariable( | |||
4324 | cast<llvm::GlobalVariable>(GV->stripPointerCasts()), D); | |||
4325 | } | |||
4326 | } | |||
4327 | ||||
4328 | static bool isVarDeclStrongDefinition(const ASTContext &Context, | |||
4329 | CodeGenModule &CGM, const VarDecl *D, | |||
4330 | bool NoCommon) { | |||
4331 | // Don't give variables common linkage if -fno-common was specified unless it | |||
4332 | // was overridden by a NoCommon attribute. | |||
4333 | if ((NoCommon || D->hasAttr<NoCommonAttr>()) && !D->hasAttr<CommonAttr>()) | |||
4334 | return true; | |||
4335 | ||||
4336 | // C11 6.9.2/2: | |||
4337 | // A declaration of an identifier for an object that has file scope without | |||
4338 | // an initializer, and without a storage-class specifier or with the | |||
4339 | // storage-class specifier static, constitutes a tentative definition. | |||
4340 | if (D->getInit() || D->hasExternalStorage()) | |||
4341 | return true; | |||
4342 | ||||
4343 | // A variable cannot be both common and exist in a section. | |||
4344 | if (D->hasAttr<SectionAttr>()) | |||
4345 | return true; | |||
4346 | ||||
4347 | // A variable cannot be both common and exist in a section. | |||
4348 | // We don't try to determine which is the right section in the front-end. | |||
4349 | // If no specialized section name is applicable, it will resort to default. | |||
4350 | if (D->hasAttr<PragmaClangBSSSectionAttr>() || | |||
4351 | D->hasAttr<PragmaClangDataSectionAttr>() || | |||
4352 | D->hasAttr<PragmaClangRelroSectionAttr>() || | |||
4353 | D->hasAttr<PragmaClangRodataSectionAttr>()) | |||
4354 | return true; | |||
4355 | ||||
4356 | // Thread local vars aren't considered common linkage. | |||
4357 | if (D->getTLSKind()) | |||
4358 | return true; | |||
4359 | ||||
4360 | // Tentative definitions marked with WeakImportAttr are true definitions. | |||
4361 | if (D->hasAttr<WeakImportAttr>()) | |||
4362 | return true; | |||
4363 | ||||
4364 | // A variable cannot be both common and exist in a comdat. | |||
4365 | if (shouldBeInCOMDAT(CGM, *D)) | |||
4366 | return true; | |||
4367 | ||||
4368 | // Declarations with a required alignment do not have common linkage in MSVC | |||
4369 | // mode. | |||
4370 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
4371 | if (D->hasAttr<AlignedAttr>()) | |||
4372 | return true; | |||
4373 | QualType VarType = D->getType(); | |||
4374 | if (Context.isAlignmentRequired(VarType)) | |||
4375 | return true; | |||
4376 | ||||
4377 | if (const auto *RT = VarType->getAs<RecordType>()) { | |||
4378 | const RecordDecl *RD = RT->getDecl(); | |||
4379 | for (const FieldDecl *FD : RD->fields()) { | |||
4380 | if (FD->isBitField()) | |||
4381 | continue; | |||
4382 | if (FD->hasAttr<AlignedAttr>()) | |||
4383 | return true; | |||
4384 | if (Context.isAlignmentRequired(FD->getType())) | |||
4385 | return true; | |||
4386 | } | |||
4387 | } | |||
4388 | } | |||
4389 | ||||
4390 | // Microsoft's link.exe doesn't support alignments greater than 32 bytes for | |||
4391 | // common symbols, so symbols with greater alignment requirements cannot be | |||
4392 | // common. | |||
4393 | // Other COFF linkers (ld.bfd and LLD) support arbitrary power-of-two | |||
4394 | // alignments for common symbols via the aligncomm directive, so this | |||
4395 | // restriction only applies to MSVC environments. | |||
4396 | if (Context.getTargetInfo().getTriple().isKnownWindowsMSVCEnvironment() && | |||
4397 | Context.getTypeAlignIfKnown(D->getType()) > | |||
4398 | Context.toBits(CharUnits::fromQuantity(32))) | |||
4399 | return true; | |||
4400 | ||||
4401 | return false; | |||
4402 | } | |||
4403 | ||||
4404 | llvm::GlobalValue::LinkageTypes CodeGenModule::getLLVMLinkageForDeclarator( | |||
4405 | const DeclaratorDecl *D, GVALinkage Linkage, bool IsConstantVariable) { | |||
4406 | if (Linkage == GVA_Internal) | |||
4407 | return llvm::Function::InternalLinkage; | |||
4408 | ||||
4409 | if (D->hasAttr<WeakAttr>()) { | |||
4410 | if (IsConstantVariable) | |||
4411 | return llvm::GlobalVariable::WeakODRLinkage; | |||
4412 | else | |||
4413 | return llvm::GlobalVariable::WeakAnyLinkage; | |||
4414 | } | |||
4415 | ||||
4416 | if (const auto *FD = D->getAsFunction()) | |||
4417 | if (FD->isMultiVersion() && Linkage == GVA_AvailableExternally) | |||
4418 | return llvm::GlobalVariable::LinkOnceAnyLinkage; | |||
4419 | ||||
4420 | // We are guaranteed to have a strong definition somewhere else, | |||
4421 | // so we can use available_externally linkage. | |||
4422 | if (Linkage == GVA_AvailableExternally) | |||
4423 | return llvm::GlobalValue::AvailableExternallyLinkage; | |||
4424 | ||||
4425 | // Note that Apple's kernel linker doesn't support symbol | |||
4426 | // coalescing, so we need to avoid linkonce and weak linkages there. | |||
4427 | // Normally, this means we just map to internal, but for explicit | |||
4428 | // instantiations we'll map to external. | |||
4429 | ||||
4430 | // In C++, the compiler has to emit a definition in every translation unit | |||
4431 | // that references the function. We should use linkonce_odr because | |||
4432 | // a) if all references in this translation unit are optimized away, we | |||
4433 | // don't need to codegen it. b) if the function persists, it needs to be | |||
4434 | // merged with other definitions. c) C++ has the ODR, so we know the | |||
4435 | // definition is dependable. | |||
4436 | if (Linkage == GVA_DiscardableODR) | |||
4437 | return !Context.getLangOpts().AppleKext ? llvm::Function::LinkOnceODRLinkage | |||
4438 | : llvm::Function::InternalLinkage; | |||
4439 | ||||
4440 | // An explicit instantiation of a template has weak linkage, since | |||
4441 | // explicit instantiations can occur in multiple translation units | |||
4442 | // and must all be equivalent. However, we are not allowed to | |||
4443 | // throw away these explicit instantiations. | |||
4444 | // | |||
4445 | // We don't currently support CUDA device code spread out across multiple TUs, | |||
4446 | // so say that CUDA templates are either external (for kernels) or internal. | |||
4447 | // This lets llvm perform aggressive inter-procedural optimizations. | |||
4448 | if (Linkage == GVA_StrongODR) { | |||
4449 | if (Context.getLangOpts().AppleKext) | |||
4450 | return llvm::Function::ExternalLinkage; | |||
4451 | if (Context.getLangOpts().CUDA && Context.getLangOpts().CUDAIsDevice) | |||
4452 | return D->hasAttr<CUDAGlobalAttr>() ? llvm::Function::ExternalLinkage | |||
4453 | : llvm::Function::InternalLinkage; | |||
4454 | return llvm::Function::WeakODRLinkage; | |||
4455 | } | |||
4456 | ||||
4457 | // C++ doesn't have tentative definitions and thus cannot have common | |||
4458 | // linkage. | |||
4459 | if (!getLangOpts().CPlusPlus && isa<VarDecl>(D) && | |||
4460 | !isVarDeclStrongDefinition(Context, *this, cast<VarDecl>(D), | |||
4461 | CodeGenOpts.NoCommon)) | |||
4462 | return llvm::GlobalVariable::CommonLinkage; | |||
4463 | ||||
4464 | // selectany symbols are externally visible, so use weak instead of | |||
4465 | // linkonce. MSVC optimizes away references to const selectany globals, so | |||
4466 | // all definitions should be the same and ODR linkage should be used. | |||
4467 | // http://msdn.microsoft.com/en-us/library/5tkz6s71.aspx | |||
4468 | if (D->hasAttr<SelectAnyAttr>()) | |||
4469 | return llvm::GlobalVariable::WeakODRLinkage; | |||
4470 | ||||
4471 | // Otherwise, we have strong external linkage. | |||
4472 | assert(Linkage == GVA_StrongExternal)((Linkage == GVA_StrongExternal) ? static_cast<void> (0 ) : __assert_fail ("Linkage == GVA_StrongExternal", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4472, __PRETTY_FUNCTION__)); | |||
4473 | return llvm::GlobalVariable::ExternalLinkage; | |||
4474 | } | |||
4475 | ||||
4476 | llvm::GlobalValue::LinkageTypes CodeGenModule::getLLVMLinkageVarDefinition( | |||
4477 | const VarDecl *VD, bool IsConstant) { | |||
4478 | GVALinkage Linkage = getContext().GetGVALinkageForVariable(VD); | |||
4479 | return getLLVMLinkageForDeclarator(VD, Linkage, IsConstant); | |||
4480 | } | |||
4481 | ||||
4482 | /// Replace the uses of a function that was declared with a non-proto type. | |||
4483 | /// We want to silently drop extra arguments from call sites | |||
4484 | static void replaceUsesOfNonProtoConstant(llvm::Constant *old, | |||
4485 | llvm::Function *newFn) { | |||
4486 | // Fast path. | |||
4487 | if (old->use_empty()) return; | |||
4488 | ||||
4489 | llvm::Type *newRetTy = newFn->getReturnType(); | |||
4490 | SmallVector<llvm::Value*, 4> newArgs; | |||
4491 | SmallVector<llvm::OperandBundleDef, 1> newBundles; | |||
4492 | ||||
4493 | for (llvm::Value::use_iterator ui = old->use_begin(), ue = old->use_end(); | |||
4494 | ui != ue; ) { | |||
4495 | llvm::Value::use_iterator use = ui++; // Increment before the use is erased. | |||
4496 | llvm::User *user = use->getUser(); | |||
4497 | ||||
4498 | // Recognize and replace uses of bitcasts. Most calls to | |||
4499 | // unprototyped functions will use bitcasts. | |||
4500 | if (auto *bitcast = dyn_cast<llvm::ConstantExpr>(user)) { | |||
4501 | if (bitcast->getOpcode() == llvm::Instruction::BitCast) | |||
4502 | replaceUsesOfNonProtoConstant(bitcast, newFn); | |||
4503 | continue; | |||
4504 | } | |||
4505 | ||||
4506 | // Recognize calls to the function. | |||
4507 | llvm::CallBase *callSite = dyn_cast<llvm::CallBase>(user); | |||
4508 | if (!callSite) continue; | |||
4509 | if (!callSite->isCallee(&*use)) | |||
4510 | continue; | |||
4511 | ||||
4512 | // If the return types don't match exactly, then we can't | |||
4513 | // transform this call unless it's dead. | |||
4514 | if (callSite->getType() != newRetTy && !callSite->use_empty()) | |||
4515 | continue; | |||
4516 | ||||
4517 | // Get the call site's attribute list. | |||
4518 | SmallVector<llvm::AttributeSet, 8> newArgAttrs; | |||
4519 | llvm::AttributeList oldAttrs = callSite->getAttributes(); | |||
4520 | ||||
4521 | // If the function was passed too few arguments, don't transform. | |||
4522 | unsigned newNumArgs = newFn->arg_size(); | |||
4523 | if (callSite->arg_size() < newNumArgs) | |||
4524 | continue; | |||
4525 | ||||
4526 | // If extra arguments were passed, we silently drop them. | |||
4527 | // If any of the types mismatch, we don't transform. | |||
4528 | unsigned argNo = 0; | |||
4529 | bool dontTransform = false; | |||
4530 | for (llvm::Argument &A : newFn->args()) { | |||
4531 | if (callSite->getArgOperand(argNo)->getType() != A.getType()) { | |||
4532 | dontTransform = true; | |||
4533 | break; | |||
4534 | } | |||
4535 | ||||
4536 | // Add any parameter attributes. | |||
4537 | newArgAttrs.push_back(oldAttrs.getParamAttributes(argNo)); | |||
4538 | argNo++; | |||
4539 | } | |||
4540 | if (dontTransform) | |||
4541 | continue; | |||
4542 | ||||
4543 | // Okay, we can transform this. Create the new call instruction and copy | |||
4544 | // over the required information. | |||
4545 | newArgs.append(callSite->arg_begin(), callSite->arg_begin() + argNo); | |||
4546 | ||||
4547 | // Copy over any operand bundles. | |||
4548 | callSite->getOperandBundlesAsDefs(newBundles); | |||
4549 | ||||
4550 | llvm::CallBase *newCall; | |||
4551 | if (dyn_cast<llvm::CallInst>(callSite)) { | |||
4552 | newCall = | |||
4553 | llvm::CallInst::Create(newFn, newArgs, newBundles, "", callSite); | |||
4554 | } else { | |||
4555 | auto *oldInvoke = cast<llvm::InvokeInst>(callSite); | |||
4556 | newCall = llvm::InvokeInst::Create(newFn, oldInvoke->getNormalDest(), | |||
4557 | oldInvoke->getUnwindDest(), newArgs, | |||
4558 | newBundles, "", callSite); | |||
4559 | } | |||
4560 | newArgs.clear(); // for the next iteration | |||
4561 | ||||
4562 | if (!newCall->getType()->isVoidTy()) | |||
4563 | newCall->takeName(callSite); | |||
4564 | newCall->setAttributes(llvm::AttributeList::get( | |||
4565 | newFn->getContext(), oldAttrs.getFnAttributes(), | |||
4566 | oldAttrs.getRetAttributes(), newArgAttrs)); | |||
4567 | newCall->setCallingConv(callSite->getCallingConv()); | |||
4568 | ||||
4569 | // Finally, remove the old call, replacing any uses with the new one. | |||
4570 | if (!callSite->use_empty()) | |||
4571 | callSite->replaceAllUsesWith(newCall); | |||
4572 | ||||
4573 | // Copy debug location attached to CI. | |||
4574 | if (callSite->getDebugLoc()) | |||
4575 | newCall->setDebugLoc(callSite->getDebugLoc()); | |||
4576 | ||||
4577 | callSite->eraseFromParent(); | |||
4578 | } | |||
4579 | } | |||
4580 | ||||
4581 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we | |||
4582 | /// implement a function with no prototype, e.g. "int foo() {}". If there are | |||
4583 | /// existing call uses of the old function in the module, this adjusts them to | |||
4584 | /// call the new function directly. | |||
4585 | /// | |||
4586 | /// This is not just a cleanup: the always_inline pass requires direct calls to | |||
4587 | /// functions to be able to inline them. If there is a bitcast in the way, it | |||
4588 | /// won't inline them. Instcombine normally deletes these calls, but it isn't | |||
4589 | /// run at -O0. | |||
4590 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, | |||
4591 | llvm::Function *NewFn) { | |||
4592 | // If we're redefining a global as a function, don't transform it. | |||
4593 | if (!isa<llvm::Function>(Old)) return; | |||
4594 | ||||
4595 | replaceUsesOfNonProtoConstant(Old, NewFn); | |||
4596 | } | |||
4597 | ||||
4598 | void CodeGenModule::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) { | |||
4599 | auto DK = VD->isThisDeclarationADefinition(); | |||
4600 | if (DK == VarDecl::Definition && VD->hasAttr<DLLImportAttr>()) | |||
4601 | return; | |||
4602 | ||||
4603 | TemplateSpecializationKind TSK = VD->getTemplateSpecializationKind(); | |||
4604 | // If we have a definition, this might be a deferred decl. If the | |||
4605 | // instantiation is explicit, make sure we emit it at the end. | |||
4606 | if (VD->getDefinition() && TSK == TSK_ExplicitInstantiationDefinition) | |||
4607 | GetAddrOfGlobalVar(VD); | |||
4608 | ||||
4609 | EmitTopLevelDecl(VD); | |||
4610 | } | |||
4611 | ||||
4612 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD, | |||
4613 | llvm::GlobalValue *GV) { | |||
4614 | const auto *D = cast<FunctionDecl>(GD.getDecl()); | |||
4615 | ||||
4616 | // Compute the function info and LLVM type. | |||
4617 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
4618 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
4619 | ||||
4620 | // Get or create the prototype for the function. | |||
4621 | if (!GV || (GV->getValueType() != Ty)) | |||
4622 | GV = cast<llvm::GlobalValue>(GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, | |||
4623 | /*DontDefer=*/true, | |||
4624 | ForDefinition)); | |||
4625 | ||||
4626 | // Already emitted. | |||
4627 | if (!GV->isDeclaration()) | |||
4628 | return; | |||
4629 | ||||
4630 | // We need to set linkage and visibility on the function before | |||
4631 | // generating code for it because various parts of IR generation | |||
4632 | // want to propagate this information down (e.g. to local static | |||
4633 | // declarations). | |||
4634 | auto *Fn = cast<llvm::Function>(GV); | |||
4635 | setFunctionLinkage(GD, Fn); | |||
4636 | ||||
4637 | // FIXME: this is redundant with part of setFunctionDefinitionAttributes | |||
4638 | setGVProperties(Fn, GD); | |||
4639 | ||||
4640 | MaybeHandleStaticInExternC(D, Fn); | |||
4641 | ||||
4642 | maybeSetTrivialComdat(*D, *Fn); | |||
4643 | ||||
4644 | // Set CodeGen attributes that represent floating point environment. | |||
4645 | setLLVMFunctionFEnvAttributes(D, Fn); | |||
4646 | ||||
4647 | CodeGenFunction(*this).GenerateCode(GD, Fn, FI); | |||
4648 | ||||
4649 | setNonAliasAttributes(GD, Fn); | |||
4650 | SetLLVMFunctionAttributesForDefinition(D, Fn); | |||
4651 | ||||
4652 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) | |||
4653 | AddGlobalCtor(Fn, CA->getPriority()); | |||
4654 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) | |||
4655 | AddGlobalDtor(Fn, DA->getPriority()); | |||
4656 | if (D->hasAttr<AnnotateAttr>()) | |||
4657 | AddGlobalAnnotations(D, Fn); | |||
4658 | } | |||
4659 | ||||
4660 | void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { | |||
4661 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
4662 | const AliasAttr *AA = D->getAttr<AliasAttr>(); | |||
4663 | assert(AA && "Not an alias?")((AA && "Not an alias?") ? static_cast<void> (0 ) : __assert_fail ("AA && \"Not an alias?\"", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4663, __PRETTY_FUNCTION__)); | |||
4664 | ||||
4665 | StringRef MangledName = getMangledName(GD); | |||
4666 | ||||
4667 | if (AA->getAliasee() == MangledName) { | |||
4668 | Diags.Report(AA->getLocation(), diag::err_cyclic_alias) << 0; | |||
4669 | return; | |||
4670 | } | |||
4671 | ||||
4672 | // If there is a definition in the module, then it wins over the alias. | |||
4673 | // This is dubious, but allow it to be safe. Just ignore the alias. | |||
4674 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
4675 | if (Entry && !Entry->isDeclaration()) | |||
4676 | return; | |||
4677 | ||||
4678 | Aliases.push_back(GD); | |||
4679 | ||||
4680 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); | |||
4681 | ||||
4682 | // Create a reference to the named value. This ensures that it is emitted | |||
4683 | // if a deferred decl. | |||
4684 | llvm::Constant *Aliasee; | |||
4685 | llvm::GlobalValue::LinkageTypes LT; | |||
4686 | if (isa<llvm::FunctionType>(DeclTy)) { | |||
4687 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GD, | |||
4688 | /*ForVTable=*/false); | |||
4689 | LT = getFunctionLinkage(GD); | |||
4690 | } else { | |||
4691 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), | |||
4692 | llvm::PointerType::getUnqual(DeclTy), | |||
4693 | /*D=*/nullptr); | |||
4694 | if (const auto *VD = dyn_cast<VarDecl>(GD.getDecl())) | |||
4695 | LT = getLLVMLinkageVarDefinition(VD, D->getType().isConstQualified()); | |||
4696 | else | |||
4697 | LT = getFunctionLinkage(GD); | |||
4698 | } | |||
4699 | ||||
4700 | // Create the new alias itself, but don't set a name yet. | |||
4701 | unsigned AS = Aliasee->getType()->getPointerAddressSpace(); | |||
4702 | auto *GA = | |||
4703 | llvm::GlobalAlias::create(DeclTy, AS, LT, "", Aliasee, &getModule()); | |||
4704 | ||||
4705 | if (Entry) { | |||
4706 | if (GA->getAliasee() == Entry) { | |||
4707 | Diags.Report(AA->getLocation(), diag::err_cyclic_alias) << 0; | |||
4708 | return; | |||
4709 | } | |||
4710 | ||||
4711 | assert(Entry->isDeclaration())((Entry->isDeclaration()) ? static_cast<void> (0) : __assert_fail ("Entry->isDeclaration()", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4711, __PRETTY_FUNCTION__)); | |||
4712 | ||||
4713 | // If there is a declaration in the module, then we had an extern followed | |||
4714 | // by the alias, as in: | |||
4715 | // extern int test6(); | |||
4716 | // ... | |||
4717 | // int test6() __attribute__((alias("test7"))); | |||
4718 | // | |||
4719 | // Remove it and replace uses of it with the alias. | |||
4720 | GA->takeName(Entry); | |||
4721 | ||||
4722 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, | |||
4723 | Entry->getType())); | |||
4724 | Entry->eraseFromParent(); | |||
4725 | } else { | |||
4726 | GA->setName(MangledName); | |||
4727 | } | |||
4728 | ||||
4729 | // Set attributes which are particular to an alias; this is a | |||
4730 | // specialization of the attributes which may be set on a global | |||
4731 | // variable/function. | |||
4732 | if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakRefAttr>() || | |||
4733 | D->isWeakImported()) { | |||
4734 | GA->setLinkage(llvm::Function::WeakAnyLinkage); | |||
4735 | } | |||
4736 | ||||
4737 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
4738 | if (VD->getTLSKind()) | |||
4739 | setTLSMode(GA, *VD); | |||
4740 | ||||
4741 | SetCommonAttributes(GD, GA); | |||
4742 | } | |||
4743 | ||||
4744 | void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) { | |||
4745 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
4746 | const IFuncAttr *IFA = D->getAttr<IFuncAttr>(); | |||
4747 | assert(IFA && "Not an ifunc?")((IFA && "Not an ifunc?") ? static_cast<void> ( 0) : __assert_fail ("IFA && \"Not an ifunc?\"", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4747, __PRETTY_FUNCTION__)); | |||
4748 | ||||
4749 | StringRef MangledName = getMangledName(GD); | |||
4750 | ||||
4751 | if (IFA->getResolver() == MangledName) { | |||
4752 | Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1; | |||
4753 | return; | |||
4754 | } | |||
4755 | ||||
4756 | // Report an error if some definition overrides ifunc. | |||
4757 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
4758 | if (Entry && !Entry->isDeclaration()) { | |||
4759 | GlobalDecl OtherGD; | |||
4760 | if (lookupRepresentativeDecl(MangledName, OtherGD) && | |||
4761 | DiagnosedConflictingDefinitions.insert(GD).second) { | |||
4762 | Diags.Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
4763 | << MangledName; | |||
4764 | Diags.Report(OtherGD.getDecl()->getLocation(), | |||
4765 | diag::note_previous_definition); | |||
4766 | } | |||
4767 | return; | |||
4768 | } | |||
4769 | ||||
4770 | Aliases.push_back(GD); | |||
4771 | ||||
4772 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); | |||
4773 | llvm::Constant *Resolver = | |||
4774 | GetOrCreateLLVMFunction(IFA->getResolver(), DeclTy, GD, | |||
4775 | /*ForVTable=*/false); | |||
4776 | llvm::GlobalIFunc *GIF = | |||
4777 | llvm::GlobalIFunc::create(DeclTy, 0, llvm::Function::ExternalLinkage, | |||
4778 | "", Resolver, &getModule()); | |||
4779 | if (Entry) { | |||
4780 | if (GIF->getResolver() == Entry) { | |||
4781 | Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1; | |||
4782 | return; | |||
4783 | } | |||
4784 | assert(Entry->isDeclaration())((Entry->isDeclaration()) ? static_cast<void> (0) : __assert_fail ("Entry->isDeclaration()", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 4784, __PRETTY_FUNCTION__)); | |||
4785 | ||||
4786 | // If there is a declaration in the module, then we had an extern followed | |||
4787 | // by the ifunc, as in: | |||
4788 | // extern int test(); | |||
4789 | // ... | |||
4790 | // int test() __attribute__((ifunc("resolver"))); | |||
4791 | // | |||
4792 | // Remove it and replace uses of it with the ifunc. | |||
4793 | GIF->takeName(Entry); | |||
4794 | ||||
4795 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GIF, | |||
4796 | Entry->getType())); | |||
4797 | Entry->eraseFromParent(); | |||
4798 | } else | |||
4799 | GIF->setName(MangledName); | |||
4800 | ||||
4801 | SetCommonAttributes(GD, GIF); | |||
4802 | } | |||
4803 | ||||
4804 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID, | |||
4805 | ArrayRef<llvm::Type*> Tys) { | |||
4806 | return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, | |||
4807 | Tys); | |||
4808 | } | |||
4809 | ||||
4810 | static llvm::StringMapEntry<llvm::GlobalVariable *> & | |||
4811 | GetConstantCFStringEntry(llvm::StringMap<llvm::GlobalVariable *> &Map, | |||
4812 | const StringLiteral *Literal, bool TargetIsLSB, | |||
4813 | bool &IsUTF16, unsigned &StringLength) { | |||
4814 | StringRef String = Literal->getString(); | |||
4815 | unsigned NumBytes = String.size(); | |||
4816 | ||||
4817 | // Check for simple case. | |||
4818 | if (!Literal->containsNonAsciiOrNull()) { | |||
4819 | StringLength = NumBytes; | |||
4820 | return *Map.insert(std::make_pair(String, nullptr)).first; | |||
4821 | } | |||
4822 | ||||
4823 | // Otherwise, convert the UTF8 literals into a string of shorts. | |||
4824 | IsUTF16 = true; | |||
4825 | ||||
4826 | SmallVector<llvm::UTF16, 128> ToBuf(NumBytes + 1); // +1 for ending nulls. | |||
4827 | const llvm::UTF8 *FromPtr = (const llvm::UTF8 *)String.data(); | |||
4828 | llvm::UTF16 *ToPtr = &ToBuf[0]; | |||
4829 | ||||
4830 | (void)llvm::ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, &ToPtr, | |||
4831 | ToPtr + NumBytes, llvm::strictConversion); | |||
4832 | ||||
4833 | // ConvertUTF8toUTF16 returns the length in ToPtr. | |||
4834 | StringLength = ToPtr - &ToBuf[0]; | |||
4835 | ||||
4836 | // Add an explicit null. | |||
4837 | *ToPtr = 0; | |||
4838 | return *Map.insert(std::make_pair( | |||
4839 | StringRef(reinterpret_cast<const char *>(ToBuf.data()), | |||
4840 | (StringLength + 1) * 2), | |||
4841 | nullptr)).first; | |||
4842 | } | |||
4843 | ||||
4844 | ConstantAddress | |||
4845 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { | |||
4846 | unsigned StringLength = 0; | |||
4847 | bool isUTF16 = false; | |||
4848 | llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = | |||
4849 | GetConstantCFStringEntry(CFConstantStringMap, Literal, | |||
4850 | getDataLayout().isLittleEndian(), isUTF16, | |||
4851 | StringLength); | |||
4852 | ||||
4853 | if (auto *C = Entry.second) | |||
4854 | return ConstantAddress(C, CharUnits::fromQuantity(C->getAlignment())); | |||
4855 | ||||
4856 | llvm::Constant *Zero = llvm::Constant::getNullValue(Int32Ty); | |||
4857 | llvm::Constant *Zeros[] = { Zero, Zero }; | |||
4858 | ||||
4859 | const ASTContext &Context = getContext(); | |||
4860 | const llvm::Triple &Triple = getTriple(); | |||
4861 | ||||
4862 | const auto CFRuntime = getLangOpts().CFRuntime; | |||
4863 | const bool IsSwiftABI = | |||
4864 | static_cast<unsigned>(CFRuntime) >= | |||
4865 | static_cast<unsigned>(LangOptions::CoreFoundationABI::Swift); | |||
4866 | const bool IsSwift4_1 = CFRuntime == LangOptions::CoreFoundationABI::Swift4_1; | |||
4867 | ||||
4868 | // If we don't already have it, get __CFConstantStringClassReference. | |||
4869 | if (!CFConstantStringClassRef) { | |||
4870 | const char *CFConstantStringClassName = "__CFConstantStringClassReference"; | |||
4871 | llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); | |||
4872 | Ty = llvm::ArrayType::get(Ty, 0); | |||
4873 | ||||
4874 | switch (CFRuntime) { | |||
4875 | default: break; | |||
4876 | case LangOptions::CoreFoundationABI::Swift: LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
4877 | case LangOptions::CoreFoundationABI::Swift5_0: | |||
4878 | CFConstantStringClassName = | |||
4879 | Triple.isOSDarwin() ? "$s15SwiftFoundation19_NSCFConstantStringCN" | |||
4880 | : "$s10Foundation19_NSCFConstantStringCN"; | |||
4881 | Ty = IntPtrTy; | |||
4882 | break; | |||
4883 | case LangOptions::CoreFoundationABI::Swift4_2: | |||
4884 | CFConstantStringClassName = | |||
4885 | Triple.isOSDarwin() ? "$S15SwiftFoundation19_NSCFConstantStringCN" | |||
4886 | : "$S10Foundation19_NSCFConstantStringCN"; | |||
4887 | Ty = IntPtrTy; | |||
4888 | break; | |||
4889 | case LangOptions::CoreFoundationABI::Swift4_1: | |||
4890 | CFConstantStringClassName = | |||
4891 | Triple.isOSDarwin() ? "__T015SwiftFoundation19_NSCFConstantStringCN" | |||
4892 | : "__T010Foundation19_NSCFConstantStringCN"; | |||
4893 | Ty = IntPtrTy; | |||
4894 | break; | |||
4895 | } | |||
4896 | ||||
4897 | llvm::Constant *C = CreateRuntimeVariable(Ty, CFConstantStringClassName); | |||
4898 | ||||
4899 | if (Triple.isOSBinFormatELF() || Triple.isOSBinFormatCOFF()) { | |||
4900 | llvm::GlobalValue *GV = nullptr; | |||
4901 | ||||
4902 | if ((GV = dyn_cast<llvm::GlobalValue>(C))) { | |||
4903 | IdentifierInfo &II = Context.Idents.get(GV->getName()); | |||
4904 | TranslationUnitDecl *TUDecl = Context.getTranslationUnitDecl(); | |||
4905 | DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl); | |||
4906 | ||||
4907 | const VarDecl *VD = nullptr; | |||
4908 | for (const auto &Result : DC->lookup(&II)) | |||
4909 | if ((VD = dyn_cast<VarDecl>(Result))) | |||
4910 | break; | |||
4911 | ||||
4912 | if (Triple.isOSBinFormatELF()) { | |||
4913 | if (!VD) | |||
4914 | GV->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
4915 | } else { | |||
4916 | GV->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
4917 | if (!VD || !VD->hasAttr<DLLExportAttr>()) | |||
4918 | GV->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); | |||
4919 | else | |||
4920 | GV->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass); | |||
4921 | } | |||
4922 | ||||
4923 | setDSOLocal(GV); | |||
4924 | } | |||
4925 | } | |||
4926 | ||||
4927 | // Decay array -> ptr | |||
4928 | CFConstantStringClassRef = | |||
4929 | IsSwiftABI ? llvm::ConstantExpr::getPtrToInt(C, Ty) | |||
4930 | : llvm::ConstantExpr::getGetElementPtr(Ty, C, Zeros); | |||
4931 | } | |||
4932 | ||||
4933 | QualType CFTy = Context.getCFConstantStringType(); | |||
4934 | ||||
4935 | auto *STy = cast<llvm::StructType>(getTypes().ConvertType(CFTy)); | |||
4936 | ||||
4937 | ConstantInitBuilder Builder(*this); | |||
4938 | auto Fields = Builder.beginStruct(STy); | |||
4939 | ||||
4940 | // Class pointer. | |||
4941 | Fields.add(cast<llvm::ConstantExpr>(CFConstantStringClassRef)); | |||
4942 | ||||
4943 | // Flags. | |||
4944 | if (IsSwiftABI) { | |||
4945 | Fields.addInt(IntPtrTy, IsSwift4_1 ? 0x05 : 0x01); | |||
4946 | Fields.addInt(Int64Ty, isUTF16 ? 0x07d0 : 0x07c8); | |||
4947 | } else { | |||
4948 | Fields.addInt(IntTy, isUTF16 ? 0x07d0 : 0x07C8); | |||
4949 | } | |||
4950 | ||||
4951 | // String pointer. | |||
4952 | llvm::Constant *C = nullptr; | |||
4953 | if (isUTF16) { | |||
4954 | auto Arr = llvm::makeArrayRef( | |||
4955 | reinterpret_cast<uint16_t *>(const_cast<char *>(Entry.first().data())), | |||
4956 | Entry.first().size() / 2); | |||
4957 | C = llvm::ConstantDataArray::get(VMContext, Arr); | |||
4958 | } else { | |||
4959 | C = llvm::ConstantDataArray::getString(VMContext, Entry.first()); | |||
4960 | } | |||
4961 | ||||
4962 | // Note: -fwritable-strings doesn't make the backing store strings of | |||
4963 | // CFStrings writable. (See <rdar://problem/10657500>) | |||
4964 | auto *GV = | |||
4965 | new llvm::GlobalVariable(getModule(), C->getType(), /*isConstant=*/true, | |||
4966 | llvm::GlobalValue::PrivateLinkage, C, ".str"); | |||
4967 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
4968 | // Don't enforce the target's minimum global alignment, since the only use | |||
4969 | // of the string is via this class initializer. | |||
4970 | CharUnits Align = isUTF16 ? Context.getTypeAlignInChars(Context.ShortTy) | |||
4971 | : Context.getTypeAlignInChars(Context.CharTy); | |||
4972 | GV->setAlignment(Align.getAsAlign()); | |||
4973 | ||||
4974 | // FIXME: We set the section explicitly to avoid a bug in ld64 224.1. | |||
4975 | // Without it LLVM can merge the string with a non unnamed_addr one during | |||
4976 | // LTO. Doing that changes the section it ends in, which surprises ld64. | |||
4977 | if (Triple.isOSBinFormatMachO()) | |||
4978 | GV->setSection(isUTF16 ? "__TEXT,__ustring" | |||
4979 | : "__TEXT,__cstring,cstring_literals"); | |||
4980 | // Make sure the literal ends up in .rodata to allow for safe ICF and for | |||
4981 | // the static linker to adjust permissions to read-only later on. | |||
4982 | else if (Triple.isOSBinFormatELF()) | |||
4983 | GV->setSection(".rodata"); | |||
4984 | ||||
4985 | // String. | |||
4986 | llvm::Constant *Str = | |||
4987 | llvm::ConstantExpr::getGetElementPtr(GV->getValueType(), GV, Zeros); | |||
4988 | ||||
4989 | if (isUTF16) | |||
4990 | // Cast the UTF16 string to the correct type. | |||
4991 | Str = llvm::ConstantExpr::getBitCast(Str, Int8PtrTy); | |||
4992 | Fields.add(Str); | |||
4993 | ||||
4994 | // String length. | |||
4995 | llvm::IntegerType *LengthTy = | |||
4996 | llvm::IntegerType::get(getModule().getContext(), | |||
4997 | Context.getTargetInfo().getLongWidth()); | |||
4998 | if (IsSwiftABI) { | |||
4999 | if (CFRuntime == LangOptions::CoreFoundationABI::Swift4_1 || | |||
5000 | CFRuntime == LangOptions::CoreFoundationABI::Swift4_2) | |||
5001 | LengthTy = Int32Ty; | |||
5002 | else | |||
5003 | LengthTy = IntPtrTy; | |||
5004 | } | |||
5005 | Fields.addInt(LengthTy, StringLength); | |||
5006 | ||||
5007 | // Swift ABI requires 8-byte alignment to ensure that the _Atomic(uint64_t) is | |||
5008 | // properly aligned on 32-bit platforms. | |||
5009 | CharUnits Alignment = | |||
5010 | IsSwiftABI ? Context.toCharUnitsFromBits(64) : getPointerAlign(); | |||
5011 | ||||
5012 | // The struct. | |||
5013 | GV = Fields.finishAndCreateGlobal("_unnamed_cfstring_", Alignment, | |||
5014 | /*isConstant=*/false, | |||
5015 | llvm::GlobalVariable::PrivateLinkage); | |||
5016 | GV->addAttribute("objc_arc_inert"); | |||
5017 | switch (Triple.getObjectFormat()) { | |||
5018 | case llvm::Triple::UnknownObjectFormat: | |||
5019 | llvm_unreachable("unknown file format")::llvm::llvm_unreachable_internal("unknown file format", "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5019); | |||
5020 | case llvm::Triple::GOFF: | |||
5021 | llvm_unreachable("GOFF is not yet implemented")::llvm::llvm_unreachable_internal("GOFF is not yet implemented" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5021); | |||
5022 | case llvm::Triple::XCOFF: | |||
5023 | llvm_unreachable("XCOFF is not yet implemented")::llvm::llvm_unreachable_internal("XCOFF is not yet implemented" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5023); | |||
5024 | case llvm::Triple::COFF: | |||
5025 | case llvm::Triple::ELF: | |||
5026 | case llvm::Triple::Wasm: | |||
5027 | GV->setSection("cfstring"); | |||
5028 | break; | |||
5029 | case llvm::Triple::MachO: | |||
5030 | GV->setSection("__DATA,__cfstring"); | |||
5031 | break; | |||
5032 | } | |||
5033 | Entry.second = GV; | |||
5034 | ||||
5035 | return ConstantAddress(GV, Alignment); | |||
5036 | } | |||
5037 | ||||
5038 | bool CodeGenModule::getExpressionLocationsEnabled() const { | |||
5039 | return !CodeGenOpts.EmitCodeView || CodeGenOpts.DebugColumnInfo; | |||
5040 | } | |||
5041 | ||||
5042 | QualType CodeGenModule::getObjCFastEnumerationStateType() { | |||
5043 | if (ObjCFastEnumerationStateType.isNull()) { | |||
5044 | RecordDecl *D = Context.buildImplicitRecord("__objcFastEnumerationState"); | |||
5045 | D->startDefinition(); | |||
5046 | ||||
5047 | QualType FieldTypes[] = { | |||
5048 | Context.UnsignedLongTy, | |||
5049 | Context.getPointerType(Context.getObjCIdType()), | |||
5050 | Context.getPointerType(Context.UnsignedLongTy), | |||
5051 | Context.getConstantArrayType(Context.UnsignedLongTy, | |||
5052 | llvm::APInt(32, 5), nullptr, ArrayType::Normal, 0) | |||
5053 | }; | |||
5054 | ||||
5055 | for (size_t i = 0; i < 4; ++i) { | |||
5056 | FieldDecl *Field = FieldDecl::Create(Context, | |||
5057 | D, | |||
5058 | SourceLocation(), | |||
5059 | SourceLocation(), nullptr, | |||
5060 | FieldTypes[i], /*TInfo=*/nullptr, | |||
5061 | /*BitWidth=*/nullptr, | |||
5062 | /*Mutable=*/false, | |||
5063 | ICIS_NoInit); | |||
5064 | Field->setAccess(AS_public); | |||
5065 | D->addDecl(Field); | |||
5066 | } | |||
5067 | ||||
5068 | D->completeDefinition(); | |||
5069 | ObjCFastEnumerationStateType = Context.getTagDeclType(D); | |||
5070 | } | |||
5071 | ||||
5072 | return ObjCFastEnumerationStateType; | |||
5073 | } | |||
5074 | ||||
5075 | llvm::Constant * | |||
5076 | CodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) { | |||
5077 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5077, __PRETTY_FUNCTION__)); | |||
5078 | ||||
5079 | // Don't emit it as the address of the string, emit the string data itself | |||
5080 | // as an inline array. | |||
5081 | if (E->getCharByteWidth() == 1) { | |||
5082 | SmallString<64> Str(E->getString()); | |||
5083 | ||||
5084 | // Resize the string to the right size, which is indicated by its type. | |||
5085 | const ConstantArrayType *CAT = Context.getAsConstantArrayType(E->getType()); | |||
5086 | Str.resize(CAT->getSize().getZExtValue()); | |||
5087 | return llvm::ConstantDataArray::getString(VMContext, Str, false); | |||
5088 | } | |||
5089 | ||||
5090 | auto *AType = cast<llvm::ArrayType>(getTypes().ConvertType(E->getType())); | |||
5091 | llvm::Type *ElemTy = AType->getElementType(); | |||
5092 | unsigned NumElements = AType->getNumElements(); | |||
5093 | ||||
5094 | // Wide strings have either 2-byte or 4-byte elements. | |||
5095 | if (ElemTy->getPrimitiveSizeInBits() == 16) { | |||
5096 | SmallVector<uint16_t, 32> Elements; | |||
5097 | Elements.reserve(NumElements); | |||
5098 | ||||
5099 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) | |||
5100 | Elements.push_back(E->getCodeUnit(i)); | |||
5101 | Elements.resize(NumElements); | |||
5102 | return llvm::ConstantDataArray::get(VMContext, Elements); | |||
5103 | } | |||
5104 | ||||
5105 | assert(ElemTy->getPrimitiveSizeInBits() == 32)((ElemTy->getPrimitiveSizeInBits() == 32) ? static_cast< void> (0) : __assert_fail ("ElemTy->getPrimitiveSizeInBits() == 32" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5105, __PRETTY_FUNCTION__)); | |||
5106 | SmallVector<uint32_t, 32> Elements; | |||
5107 | Elements.reserve(NumElements); | |||
5108 | ||||
5109 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) | |||
5110 | Elements.push_back(E->getCodeUnit(i)); | |||
5111 | Elements.resize(NumElements); | |||
5112 | return llvm::ConstantDataArray::get(VMContext, Elements); | |||
5113 | } | |||
5114 | ||||
5115 | static llvm::GlobalVariable * | |||
5116 | GenerateStringLiteral(llvm::Constant *C, llvm::GlobalValue::LinkageTypes LT, | |||
5117 | CodeGenModule &CGM, StringRef GlobalName, | |||
5118 | CharUnits Alignment) { | |||
5119 | unsigned AddrSpace = CGM.getContext().getTargetAddressSpace( | |||
5120 | CGM.getStringLiteralAddressSpace()); | |||
5121 | ||||
5122 | llvm::Module &M = CGM.getModule(); | |||
5123 | // Create a global variable for this string | |||
5124 | auto *GV = new llvm::GlobalVariable( | |||
5125 | M, C->getType(), !CGM.getLangOpts().WritableStrings, LT, C, GlobalName, | |||
5126 | nullptr, llvm::GlobalVariable::NotThreadLocal, AddrSpace); | |||
5127 | GV->setAlignment(Alignment.getAsAlign()); | |||
5128 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
5129 | if (GV->isWeakForLinker()) { | |||
5130 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5130, __PRETTY_FUNCTION__)); | |||
5131 | GV->setComdat(M.getOrInsertComdat(GV->getName())); | |||
5132 | } | |||
5133 | CGM.setDSOLocal(GV); | |||
5134 | ||||
5135 | return GV; | |||
5136 | } | |||
5137 | ||||
5138 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a | |||
5139 | /// constant array for the given string literal. | |||
5140 | ConstantAddress | |||
5141 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S, | |||
5142 | StringRef Name) { | |||
5143 | CharUnits Alignment = getContext().getAlignOfGlobalVarInChars(S->getType()); | |||
5144 | ||||
5145 | llvm::Constant *C = GetConstantArrayFromStringLiteral(S); | |||
5146 | llvm::GlobalVariable **Entry = nullptr; | |||
5147 | if (!LangOpts.WritableStrings) { | |||
5148 | Entry = &ConstantStringMap[C]; | |||
5149 | if (auto GV = *Entry) { | |||
5150 | if (Alignment.getQuantity() > GV->getAlignment()) | |||
5151 | GV->setAlignment(Alignment.getAsAlign()); | |||
5152 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5153 | Alignment); | |||
5154 | } | |||
5155 | } | |||
5156 | ||||
5157 | SmallString<256> MangledNameBuffer; | |||
5158 | StringRef GlobalVariableName; | |||
5159 | llvm::GlobalValue::LinkageTypes LT; | |||
5160 | ||||
5161 | // Mangle the string literal if that's how the ABI merges duplicate strings. | |||
5162 | // Don't do it if they are writable, since we don't want writes in one TU to | |||
5163 | // affect strings in another. | |||
5164 | if (getCXXABI().getMangleContext().shouldMangleStringLiteral(S) && | |||
5165 | !LangOpts.WritableStrings) { | |||
5166 | llvm::raw_svector_ostream Out(MangledNameBuffer); | |||
5167 | getCXXABI().getMangleContext().mangleStringLiteral(S, Out); | |||
5168 | LT = llvm::GlobalValue::LinkOnceODRLinkage; | |||
5169 | GlobalVariableName = MangledNameBuffer; | |||
5170 | } else { | |||
5171 | LT = llvm::GlobalValue::PrivateLinkage; | |||
5172 | GlobalVariableName = Name; | |||
5173 | } | |||
5174 | ||||
5175 | auto GV = GenerateStringLiteral(C, LT, *this, GlobalVariableName, Alignment); | |||
5176 | if (Entry) | |||
5177 | *Entry = GV; | |||
5178 | ||||
5179 | SanitizerMD->reportGlobalToASan(GV, S->getStrTokenLoc(0), "<string literal>", | |||
5180 | QualType()); | |||
5181 | ||||
5182 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5183 | Alignment); | |||
5184 | } | |||
5185 | ||||
5186 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant | |||
5187 | /// array for the given ObjCEncodeExpr node. | |||
5188 | ConstantAddress | |||
5189 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { | |||
5190 | std::string Str; | |||
5191 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); | |||
5192 | ||||
5193 | return GetAddrOfConstantCString(Str); | |||
5194 | } | |||
5195 | ||||
5196 | /// GetAddrOfConstantCString - Returns a pointer to a character array containing | |||
5197 | /// the literal and a terminating '\0' character. | |||
5198 | /// The result has pointer to array type. | |||
5199 | ConstantAddress CodeGenModule::GetAddrOfConstantCString( | |||
5200 | const std::string &Str, const char *GlobalName) { | |||
5201 | StringRef StrWithNull(Str.c_str(), Str.size() + 1); | |||
5202 | CharUnits Alignment = | |||
5203 | getContext().getAlignOfGlobalVarInChars(getContext().CharTy); | |||
5204 | ||||
5205 | llvm::Constant *C = | |||
5206 | llvm::ConstantDataArray::getString(getLLVMContext(), StrWithNull, false); | |||
5207 | ||||
5208 | // Don't share any string literals if strings aren't constant. | |||
5209 | llvm::GlobalVariable **Entry = nullptr; | |||
5210 | if (!LangOpts.WritableStrings) { | |||
5211 | Entry = &ConstantStringMap[C]; | |||
5212 | if (auto GV = *Entry) { | |||
5213 | if (Alignment.getQuantity() > GV->getAlignment()) | |||
5214 | GV->setAlignment(Alignment.getAsAlign()); | |||
5215 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5216 | Alignment); | |||
5217 | } | |||
5218 | } | |||
5219 | ||||
5220 | // Get the default prefix if a name wasn't specified. | |||
5221 | if (!GlobalName) | |||
5222 | GlobalName = ".str"; | |||
5223 | // Create a global variable for this. | |||
5224 | auto GV = GenerateStringLiteral(C, llvm::GlobalValue::PrivateLinkage, *this, | |||
5225 | GlobalName, Alignment); | |||
5226 | if (Entry) | |||
5227 | *Entry = GV; | |||
5228 | ||||
5229 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5230 | Alignment); | |||
5231 | } | |||
5232 | ||||
5233 | ConstantAddress CodeGenModule::GetAddrOfGlobalTemporary( | |||
5234 | const MaterializeTemporaryExpr *E, const Expr *Init) { | |||
5235 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5236, __PRETTY_FUNCTION__)) | |||
5236 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5236, __PRETTY_FUNCTION__)); | |||
5237 | const auto *VD = cast<VarDecl>(E->getExtendingDecl()); | |||
5238 | ||||
5239 | // If we're not materializing a subobject of the temporary, keep the | |||
5240 | // cv-qualifiers from the type of the MaterializeTemporaryExpr. | |||
5241 | QualType MaterializedType = Init->getType(); | |||
5242 | if (Init == E->getSubExpr()) | |||
5243 | MaterializedType = E->getType(); | |||
5244 | ||||
5245 | CharUnits Align = getContext().getTypeAlignInChars(MaterializedType); | |||
5246 | ||||
5247 | if (llvm::Constant *Slot = MaterializedGlobalTemporaryMap[E]) | |||
5248 | return ConstantAddress(Slot, Align); | |||
5249 | ||||
5250 | // FIXME: If an externally-visible declaration extends multiple temporaries, | |||
5251 | // we need to give each temporary the same name in every translation unit (and | |||
5252 | // we also need to make the temporaries externally-visible). | |||
5253 | SmallString<256> Name; | |||
5254 | llvm::raw_svector_ostream Out(Name); | |||
5255 | getCXXABI().getMangleContext().mangleReferenceTemporary( | |||
5256 | VD, E->getManglingNumber(), Out); | |||
5257 | ||||
5258 | APValue *Value = nullptr; | |||
5259 | if (E->getStorageDuration() == SD_Static && VD && VD->evaluateValue()) { | |||
5260 | // If the initializer of the extending declaration is a constant | |||
5261 | // initializer, we should have a cached constant initializer for this | |||
5262 | // temporary. Note that this might have a different value from the value | |||
5263 | // computed by evaluating the initializer if the surrounding constant | |||
5264 | // expression modifies the temporary. | |||
5265 | Value = E->getOrCreateValue(false); | |||
5266 | } | |||
5267 | ||||
5268 | // Try evaluating it now, it might have a constant initializer. | |||
5269 | Expr::EvalResult EvalResult; | |||
5270 | if (!Value && Init->EvaluateAsRValue(EvalResult, getContext()) && | |||
5271 | !EvalResult.hasSideEffects()) | |||
5272 | Value = &EvalResult.Val; | |||
5273 | ||||
5274 | LangAS AddrSpace = | |||
5275 | VD ? GetGlobalVarAddressSpace(VD) : MaterializedType.getAddressSpace(); | |||
5276 | ||||
5277 | Optional<ConstantEmitter> emitter; | |||
5278 | llvm::Constant *InitialValue = nullptr; | |||
5279 | bool Constant = false; | |||
5280 | llvm::Type *Type; | |||
5281 | if (Value) { | |||
5282 | // The temporary has a constant initializer, use it. | |||
5283 | emitter.emplace(*this); | |||
5284 | InitialValue = emitter->emitForInitializer(*Value, AddrSpace, | |||
5285 | MaterializedType); | |||
5286 | Constant = isTypeConstant(MaterializedType, /*ExcludeCtor*/Value); | |||
5287 | Type = InitialValue->getType(); | |||
5288 | } else { | |||
5289 | // No initializer, the initialization will be provided when we | |||
5290 | // initialize the declaration which performed lifetime extension. | |||
5291 | Type = getTypes().ConvertTypeForMem(MaterializedType); | |||
5292 | } | |||
5293 | ||||
5294 | // Create a global variable for this lifetime-extended temporary. | |||
5295 | llvm::GlobalValue::LinkageTypes Linkage = | |||
5296 | getLLVMLinkageVarDefinition(VD, Constant); | |||
5297 | if (Linkage == llvm::GlobalVariable::ExternalLinkage) { | |||
5298 | const VarDecl *InitVD; | |||
5299 | if (VD->isStaticDataMember() && VD->getAnyInitializer(InitVD) && | |||
5300 | isa<CXXRecordDecl>(InitVD->getLexicalDeclContext())) { | |||
5301 | // Temporaries defined inside a class get linkonce_odr linkage because the | |||
5302 | // class can be defined in multiple translation units. | |||
5303 | Linkage = llvm::GlobalVariable::LinkOnceODRLinkage; | |||
5304 | } else { | |||
5305 | // There is no need for this temporary to have external linkage if the | |||
5306 | // VarDecl has external linkage. | |||
5307 | Linkage = llvm::GlobalVariable::InternalLinkage; | |||
5308 | } | |||
5309 | } | |||
5310 | auto TargetAS = getContext().getTargetAddressSpace(AddrSpace); | |||
5311 | auto *GV = new llvm::GlobalVariable( | |||
5312 | getModule(), Type, Constant, Linkage, InitialValue, Name.c_str(), | |||
5313 | /*InsertBefore=*/nullptr, llvm::GlobalVariable::NotThreadLocal, TargetAS); | |||
5314 | if (emitter) emitter->finalize(GV); | |||
5315 | setGVProperties(GV, VD); | |||
5316 | GV->setAlignment(Align.getAsAlign()); | |||
5317 | if (supportsCOMDAT() && GV->isWeakForLinker()) | |||
5318 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
5319 | if (VD->getTLSKind()) | |||
5320 | setTLSMode(GV, *VD); | |||
5321 | llvm::Constant *CV = GV; | |||
5322 | if (AddrSpace != LangAS::Default) | |||
5323 | CV = getTargetCodeGenInfo().performAddrSpaceCast( | |||
5324 | *this, GV, AddrSpace, LangAS::Default, | |||
5325 | Type->getPointerTo( | |||
5326 | getContext().getTargetAddressSpace(LangAS::Default))); | |||
5327 | MaterializedGlobalTemporaryMap[E] = CV; | |||
5328 | return ConstantAddress(CV, Align); | |||
5329 | } | |||
5330 | ||||
5331 | /// EmitObjCPropertyImplementations - Emit information for synthesized | |||
5332 | /// properties for an implementation. | |||
5333 | void CodeGenModule::EmitObjCPropertyImplementations(const | |||
5334 | ObjCImplementationDecl *D) { | |||
5335 | for (const auto *PID : D->property_impls()) { | |||
5336 | // Dynamic is just for type-checking. | |||
5337 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { | |||
5338 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); | |||
5339 | ||||
5340 | // Determine which methods need to be implemented, some may have | |||
5341 | // been overridden. Note that ::isPropertyAccessor is not the method | |||
5342 | // we want, that just indicates if the decl came from a | |||
5343 | // property. What we want to know is if the method is defined in | |||
5344 | // this implementation. | |||
5345 | auto *Getter = PID->getGetterMethodDecl(); | |||
5346 | if (!Getter || Getter->isSynthesizedAccessorStub()) | |||
5347 | CodeGenFunction(*this).GenerateObjCGetter( | |||
5348 | const_cast<ObjCImplementationDecl *>(D), PID); | |||
5349 | auto *Setter = PID->getSetterMethodDecl(); | |||
5350 | if (!PD->isReadOnly() && (!Setter || Setter->isSynthesizedAccessorStub())) | |||
5351 | CodeGenFunction(*this).GenerateObjCSetter( | |||
5352 | const_cast<ObjCImplementationDecl *>(D), PID); | |||
5353 | } | |||
5354 | } | |||
5355 | } | |||
5356 | ||||
5357 | static bool needsDestructMethod(ObjCImplementationDecl *impl) { | |||
5358 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); | |||
5359 | for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); | |||
5360 | ivar; ivar = ivar->getNextIvar()) | |||
5361 | if (ivar->getType().isDestructedType()) | |||
5362 | return true; | |||
5363 | ||||
5364 | return false; | |||
5365 | } | |||
5366 | ||||
5367 | static bool AllTrivialInitializers(CodeGenModule &CGM, | |||
5368 | ObjCImplementationDecl *D) { | |||
5369 | CodeGenFunction CGF(CGM); | |||
5370 | for (ObjCImplementationDecl::init_iterator B = D->init_begin(), | |||
5371 | E = D->init_end(); B != E; ++B) { | |||
5372 | CXXCtorInitializer *CtorInitExp = *B; | |||
5373 | Expr *Init = CtorInitExp->getInit(); | |||
5374 | if (!CGF.isTrivialInitializer(Init)) | |||
5375 | return false; | |||
5376 | } | |||
5377 | return true; | |||
5378 | } | |||
5379 | ||||
5380 | /// EmitObjCIvarInitializations - Emit information for ivar initialization | |||
5381 | /// for an implementation. | |||
5382 | void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { | |||
5383 | // We might need a .cxx_destruct even if we don't have any ivar initializers. | |||
5384 | if (needsDestructMethod(D)) { | |||
5385 | IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); | |||
5386 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); | |||
5387 | ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create( | |||
5388 | getContext(), D->getLocation(), D->getLocation(), cxxSelector, | |||
5389 | getContext().VoidTy, nullptr, D, | |||
5390 | /*isInstance=*/true, /*isVariadic=*/false, | |||
5391 | /*isPropertyAccessor=*/true, /*isSynthesizedAccessorStub=*/false, | |||
5392 | /*isImplicitlyDeclared=*/true, | |||
5393 | /*isDefined=*/false, ObjCMethodDecl::Required); | |||
5394 | D->addInstanceMethod(DTORMethod); | |||
5395 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); | |||
5396 | D->setHasDestructors(true); | |||
5397 | } | |||
5398 | ||||
5399 | // If the implementation doesn't have any ivar initializers, we don't need | |||
5400 | // a .cxx_construct. | |||
5401 | if (D->getNumIvarInitializers() == 0 || | |||
5402 | AllTrivialInitializers(*this, D)) | |||
5403 | return; | |||
5404 | ||||
5405 | IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); | |||
5406 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); | |||
5407 | // The constructor returns 'self'. | |||
5408 | ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create( | |||
5409 | getContext(), D->getLocation(), D->getLocation(), cxxSelector, | |||
5410 | getContext().getObjCIdType(), nullptr, D, /*isInstance=*/true, | |||
5411 | /*isVariadic=*/false, | |||
5412 | /*isPropertyAccessor=*/true, /*isSynthesizedAccessorStub=*/false, | |||
5413 | /*isImplicitlyDeclared=*/true, | |||
5414 | /*isDefined=*/false, ObjCMethodDecl::Required); | |||
5415 | D->addInstanceMethod(CTORMethod); | |||
5416 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); | |||
5417 | D->setHasNonZeroConstructors(true); | |||
5418 | } | |||
5419 | ||||
5420 | // EmitLinkageSpec - Emit all declarations in a linkage spec. | |||
5421 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { | |||
5422 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && | |||
5423 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { | |||
5424 | ErrorUnsupported(LSD, "linkage spec"); | |||
5425 | return; | |||
5426 | } | |||
5427 | ||||
5428 | EmitDeclContext(LSD); | |||
5429 | } | |||
5430 | ||||
5431 | void CodeGenModule::EmitDeclContext(const DeclContext *DC) { | |||
5432 | for (auto *I : DC->decls()) { | |||
5433 | // Unlike other DeclContexts, the contents of an ObjCImplDecl at TU scope | |||
5434 | // are themselves considered "top-level", so EmitTopLevelDecl on an | |||
5435 | // ObjCImplDecl does not recursively visit them. We need to do that in | |||
5436 | // case they're nested inside another construct (LinkageSpecDecl / | |||
5437 | // ExportDecl) that does stop them from being considered "top-level". | |||
5438 | if (auto *OID = dyn_cast<ObjCImplDecl>(I)) { | |||
5439 | for (auto *M : OID->methods()) | |||
5440 | EmitTopLevelDecl(M); | |||
5441 | } | |||
5442 | ||||
5443 | EmitTopLevelDecl(I); | |||
5444 | } | |||
5445 | } | |||
5446 | ||||
5447 | /// EmitTopLevelDecl - Emit code for a single top level declaration. | |||
5448 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { | |||
5449 | // Ignore dependent declarations. | |||
5450 | if (D->isTemplated()) | |||
5451 | return; | |||
5452 | ||||
5453 | // Consteval function shouldn't be emitted. | |||
5454 | if (auto *FD = dyn_cast<FunctionDecl>(D)) | |||
5455 | if (FD->isConsteval()) | |||
5456 | return; | |||
5457 | ||||
5458 | switch (D->getKind()) { | |||
5459 | case Decl::CXXConversion: | |||
5460 | case Decl::CXXMethod: | |||
5461 | case Decl::Function: | |||
5462 | EmitGlobal(cast<FunctionDecl>(D)); | |||
5463 | // Always provide some coverage mapping | |||
5464 | // even for the functions that aren't emitted. | |||
5465 | AddDeferredUnusedCoverageMapping(D); | |||
5466 | break; | |||
5467 | ||||
5468 | case Decl::CXXDeductionGuide: | |||
5469 | // Function-like, but does not result in code emission. | |||
5470 | break; | |||
5471 | ||||
5472 | case Decl::Var: | |||
5473 | case Decl::Decomposition: | |||
5474 | case Decl::VarTemplateSpecialization: | |||
5475 | EmitGlobal(cast<VarDecl>(D)); | |||
5476 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) | |||
5477 | for (auto *B : DD->bindings()) | |||
5478 | if (auto *HD = B->getHoldingVar()) | |||
5479 | EmitGlobal(HD); | |||
5480 | break; | |||
5481 | ||||
5482 | // Indirect fields from global anonymous structs and unions can be | |||
5483 | // ignored; only the actual variable requires IR gen support. | |||
5484 | case Decl::IndirectField: | |||
5485 | break; | |||
5486 | ||||
5487 | // C++ Decls | |||
5488 | case Decl::Namespace: | |||
5489 | EmitDeclContext(cast<NamespaceDecl>(D)); | |||
5490 | break; | |||
5491 | case Decl::ClassTemplateSpecialization: { | |||
5492 | const auto *Spec = cast<ClassTemplateSpecializationDecl>(D); | |||
5493 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5494 | if (Spec->getSpecializationKind() == | |||
5495 | TSK_ExplicitInstantiationDefinition && | |||
5496 | Spec->hasDefinition()) | |||
5497 | DI->completeTemplateDefinition(*Spec); | |||
5498 | } LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
5499 | case Decl::CXXRecord: { | |||
5500 | CXXRecordDecl *CRD = cast<CXXRecordDecl>(D); | |||
5501 | if (CGDebugInfo *DI = getModuleDebugInfo()) { | |||
5502 | if (CRD->hasDefinition()) | |||
5503 | DI->EmitAndRetainType(getContext().getRecordType(cast<RecordDecl>(D))); | |||
5504 | if (auto *ES = D->getASTContext().getExternalSource()) | |||
5505 | if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never) | |||
5506 | DI->completeUnusedClass(*CRD); | |||
5507 | } | |||
5508 | // Emit any static data members, they may be definitions. | |||
5509 | for (auto *I : CRD->decls()) | |||
5510 | if (isa<VarDecl>(I) || isa<CXXRecordDecl>(I)) | |||
5511 | EmitTopLevelDecl(I); | |||
5512 | break; | |||
5513 | } | |||
5514 | // No code generation needed. | |||
5515 | case Decl::UsingShadow: | |||
5516 | case Decl::ClassTemplate: | |||
5517 | case Decl::VarTemplate: | |||
5518 | case Decl::Concept: | |||
5519 | case Decl::VarTemplatePartialSpecialization: | |||
5520 | case Decl::FunctionTemplate: | |||
5521 | case Decl::TypeAliasTemplate: | |||
5522 | case Decl::Block: | |||
5523 | case Decl::Empty: | |||
5524 | case Decl::Binding: | |||
5525 | break; | |||
5526 | case Decl::Using: // using X; [C++] | |||
5527 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5528 | DI->EmitUsingDecl(cast<UsingDecl>(*D)); | |||
5529 | break; | |||
5530 | case Decl::NamespaceAlias: | |||
5531 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5532 | DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(*D)); | |||
5533 | break; | |||
5534 | case Decl::UsingDirective: // using namespace X; [C++] | |||
5535 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5536 | DI->EmitUsingDirective(cast<UsingDirectiveDecl>(*D)); | |||
5537 | break; | |||
5538 | case Decl::CXXConstructor: | |||
5539 | getCXXABI().EmitCXXConstructors(cast<CXXConstructorDecl>(D)); | |||
5540 | break; | |||
5541 | case Decl::CXXDestructor: | |||
5542 | getCXXABI().EmitCXXDestructors(cast<CXXDestructorDecl>(D)); | |||
5543 | break; | |||
5544 | ||||
5545 | case Decl::StaticAssert: | |||
5546 | // Nothing to do. | |||
5547 | break; | |||
5548 | ||||
5549 | // Objective-C Decls | |||
5550 | ||||
5551 | // Forward declarations, no (immediate) code generation. | |||
5552 | case Decl::ObjCInterface: | |||
5553 | case Decl::ObjCCategory: | |||
5554 | break; | |||
5555 | ||||
5556 | case Decl::ObjCProtocol: { | |||
5557 | auto *Proto = cast<ObjCProtocolDecl>(D); | |||
5558 | if (Proto->isThisDeclarationADefinition()) | |||
5559 | ObjCRuntime->GenerateProtocol(Proto); | |||
5560 | break; | |||
5561 | } | |||
5562 | ||||
5563 | case Decl::ObjCCategoryImpl: | |||
5564 | // Categories have properties but don't support synthesize so we | |||
5565 | // can ignore them here. | |||
5566 | ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); | |||
5567 | break; | |||
5568 | ||||
5569 | case Decl::ObjCImplementation: { | |||
5570 | auto *OMD = cast<ObjCImplementationDecl>(D); | |||
5571 | EmitObjCPropertyImplementations(OMD); | |||
5572 | EmitObjCIvarInitializations(OMD); | |||
5573 | ObjCRuntime->GenerateClass(OMD); | |||
5574 | // Emit global variable debug information. | |||
5575 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5576 | if (getCodeGenOpts().hasReducedDebugInfo()) | |||
5577 | DI->getOrCreateInterfaceType(getContext().getObjCInterfaceType( | |||
5578 | OMD->getClassInterface()), OMD->getLocation()); | |||
5579 | break; | |||
5580 | } | |||
5581 | case Decl::ObjCMethod: { | |||
5582 | auto *OMD = cast<ObjCMethodDecl>(D); | |||
5583 | // If this is not a prototype, emit the body. | |||
5584 | if (OMD->getBody()) | |||
5585 | CodeGenFunction(*this).GenerateObjCMethod(OMD); | |||
5586 | break; | |||
5587 | } | |||
5588 | case Decl::ObjCCompatibleAlias: | |||
5589 | ObjCRuntime->RegisterAlias(cast<ObjCCompatibleAliasDecl>(D)); | |||
5590 | break; | |||
5591 | ||||
5592 | case Decl::PragmaComment: { | |||
5593 | const auto *PCD = cast<PragmaCommentDecl>(D); | |||
5594 | switch (PCD->getCommentKind()) { | |||
5595 | case PCK_Unknown: | |||
5596 | llvm_unreachable("unexpected pragma comment kind")::llvm::llvm_unreachable_internal("unexpected pragma comment kind" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5596); | |||
5597 | case PCK_Linker: | |||
5598 | AppendLinkerOptions(PCD->getArg()); | |||
5599 | break; | |||
5600 | case PCK_Lib: | |||
5601 | AddDependentLib(PCD->getArg()); | |||
5602 | break; | |||
5603 | case PCK_Compiler: | |||
5604 | case PCK_ExeStr: | |||
5605 | case PCK_User: | |||
5606 | break; // We ignore all of these. | |||
5607 | } | |||
5608 | break; | |||
5609 | } | |||
5610 | ||||
5611 | case Decl::PragmaDetectMismatch: { | |||
5612 | const auto *PDMD = cast<PragmaDetectMismatchDecl>(D); | |||
5613 | AddDetectMismatch(PDMD->getName(), PDMD->getValue()); | |||
5614 | break; | |||
5615 | } | |||
5616 | ||||
5617 | case Decl::LinkageSpec: | |||
5618 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); | |||
5619 | break; | |||
5620 | ||||
5621 | case Decl::FileScopeAsm: { | |||
5622 | // File-scope asm is ignored during device-side CUDA compilation. | |||
5623 | if (LangOpts.CUDA && LangOpts.CUDAIsDevice) | |||
5624 | break; | |||
5625 | // File-scope asm is ignored during device-side OpenMP compilation. | |||
5626 | if (LangOpts.OpenMPIsDevice) | |||
5627 | break; | |||
5628 | auto *AD = cast<FileScopeAsmDecl>(D); | |||
5629 | getModule().appendModuleInlineAsm(AD->getAsmString()->getString()); | |||
5630 | break; | |||
5631 | } | |||
5632 | ||||
5633 | case Decl::Import: { | |||
5634 | auto *Import = cast<ImportDecl>(D); | |||
5635 | ||||
5636 | // If we've already imported this module, we're done. | |||
5637 | if (!ImportedModules.insert(Import->getImportedModule())) | |||
5638 | break; | |||
5639 | ||||
5640 | // Emit debug information for direct imports. | |||
5641 | if (!Import->getImportedOwningModule()) { | |||
5642 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5643 | DI->EmitImportDecl(*Import); | |||
5644 | } | |||
5645 | ||||
5646 | // Find all of the submodules and emit the module initializers. | |||
5647 | llvm::SmallPtrSet<clang::Module *, 16> Visited; | |||
5648 | SmallVector<clang::Module *, 16> Stack; | |||
5649 | Visited.insert(Import->getImportedModule()); | |||
5650 | Stack.push_back(Import->getImportedModule()); | |||
5651 | ||||
5652 | while (!Stack.empty()) { | |||
5653 | clang::Module *Mod = Stack.pop_back_val(); | |||
5654 | if (!EmittedModuleInitializers.insert(Mod).second) | |||
5655 | continue; | |||
5656 | ||||
5657 | for (auto *D : Context.getModuleInitializers(Mod)) | |||
5658 | EmitTopLevelDecl(D); | |||
5659 | ||||
5660 | // Visit the submodules of this module. | |||
5661 | for (clang::Module::submodule_iterator Sub = Mod->submodule_begin(), | |||
5662 | SubEnd = Mod->submodule_end(); | |||
5663 | Sub != SubEnd; ++Sub) { | |||
5664 | // Skip explicit children; they need to be explicitly imported to emit | |||
5665 | // the initializers. | |||
5666 | if ((*Sub)->IsExplicit) | |||
5667 | continue; | |||
5668 | ||||
5669 | if (Visited.insert(*Sub).second) | |||
5670 | Stack.push_back(*Sub); | |||
5671 | } | |||
5672 | } | |||
5673 | break; | |||
5674 | } | |||
5675 | ||||
5676 | case Decl::Export: | |||
5677 | EmitDeclContext(cast<ExportDecl>(D)); | |||
5678 | break; | |||
5679 | ||||
5680 | case Decl::OMPThreadPrivate: | |||
5681 | EmitOMPThreadPrivateDecl(cast<OMPThreadPrivateDecl>(D)); | |||
5682 | break; | |||
5683 | ||||
5684 | case Decl::OMPAllocate: | |||
5685 | break; | |||
5686 | ||||
5687 | case Decl::OMPDeclareReduction: | |||
5688 | EmitOMPDeclareReduction(cast<OMPDeclareReductionDecl>(D)); | |||
5689 | break; | |||
5690 | ||||
5691 | case Decl::OMPDeclareMapper: | |||
5692 | EmitOMPDeclareMapper(cast<OMPDeclareMapperDecl>(D)); | |||
5693 | break; | |||
5694 | ||||
5695 | case Decl::OMPRequires: | |||
5696 | EmitOMPRequiresDecl(cast<OMPRequiresDecl>(D)); | |||
5697 | break; | |||
5698 | ||||
5699 | case Decl::Typedef: | |||
5700 | case Decl::TypeAlias: // using foo = bar; [C++11] | |||
5701 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5702 | DI->EmitAndRetainType( | |||
5703 | getContext().getTypedefType(cast<TypedefNameDecl>(D))); | |||
5704 | break; | |||
5705 | ||||
5706 | case Decl::Record: | |||
5707 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5708 | if (cast<RecordDecl>(D)->getDefinition()) | |||
5709 | DI->EmitAndRetainType(getContext().getRecordType(cast<RecordDecl>(D))); | |||
5710 | break; | |||
5711 | ||||
5712 | case Decl::Enum: | |||
5713 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5714 | if (cast<EnumDecl>(D)->getDefinition()) | |||
5715 | DI->EmitAndRetainType(getContext().getEnumType(cast<EnumDecl>(D))); | |||
5716 | break; | |||
5717 | ||||
5718 | default: | |||
5719 | // Make sure we handled everything we should, every other kind is a | |||
5720 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind | |||
5721 | // function. Need to recode Decl::Kind to do that easily. | |||
5722 | 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-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 5722, __PRETTY_FUNCTION__)); | |||
5723 | break; | |||
5724 | } | |||
5725 | } | |||
5726 | ||||
5727 | void CodeGenModule::AddDeferredUnusedCoverageMapping(Decl *D) { | |||
5728 | // Do we need to generate coverage mapping? | |||
5729 | if (!CodeGenOpts.CoverageMapping) | |||
5730 | return; | |||
5731 | switch (D->getKind()) { | |||
5732 | case Decl::CXXConversion: | |||
5733 | case Decl::CXXMethod: | |||
5734 | case Decl::Function: | |||
5735 | case Decl::ObjCMethod: | |||
5736 | case Decl::CXXConstructor: | |||
5737 | case Decl::CXXDestructor: { | |||
5738 | if (!cast<FunctionDecl>(D)->doesThisDeclarationHaveABody()) | |||
5739 | break; | |||
5740 | SourceManager &SM = getContext().getSourceManager(); | |||
5741 | if (LimitedCoverage && SM.getMainFileID() != SM.getFileID(D->getBeginLoc())) | |||
5742 | break; | |||
5743 | auto I = DeferredEmptyCoverageMappingDecls.find(D); | |||
5744 | if (I == DeferredEmptyCoverageMappingDecls.end()) | |||
5745 | DeferredEmptyCoverageMappingDecls[D] = true; | |||
5746 | break; | |||
5747 | } | |||
5748 | default: | |||
5749 | break; | |||
5750 | }; | |||
5751 | } | |||
5752 | ||||
5753 | void CodeGenModule::ClearUnusedCoverageMapping(const Decl *D) { | |||
5754 | // Do we need to generate coverage mapping? | |||
5755 | if (!CodeGenOpts.CoverageMapping) | |||
5756 | return; | |||
5757 | if (const auto *Fn = dyn_cast<FunctionDecl>(D)) { | |||
5758 | if (Fn->isTemplateInstantiation()) | |||
5759 | ClearUnusedCoverageMapping(Fn->getTemplateInstantiationPattern()); | |||
5760 | } | |||
5761 | auto I = DeferredEmptyCoverageMappingDecls.find(D); | |||
5762 | if (I == DeferredEmptyCoverageMappingDecls.end()) | |||
5763 | DeferredEmptyCoverageMappingDecls[D] = false; | |||
5764 | else | |||
5765 | I->second = false; | |||
5766 | } | |||
5767 | ||||
5768 | void CodeGenModule::EmitDeferredUnusedCoverageMappings() { | |||
5769 | // We call takeVector() here to avoid use-after-free. | |||
5770 | // FIXME: DeferredEmptyCoverageMappingDecls is getting mutated because | |||
5771 | // we deserialize function bodies to emit coverage info for them, and that | |||
5772 | // deserializes more declarations. How should we handle that case? | |||
5773 | for (const auto &Entry : DeferredEmptyCoverageMappingDecls.takeVector()) { | |||
5774 | if (!Entry.second) | |||
5775 | continue; | |||
5776 | const Decl *D = Entry.first; | |||
5777 | switch (D->getKind()) { | |||
5778 | case Decl::CXXConversion: | |||
5779 | case Decl::CXXMethod: | |||
5780 | case Decl::Function: | |||
5781 | case Decl::ObjCMethod: { | |||
5782 | CodeGenPGO PGO(*this); | |||
5783 | GlobalDecl GD(cast<FunctionDecl>(D)); | |||
5784 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
5785 | getFunctionLinkage(GD)); | |||
5786 | break; | |||
5787 | } | |||
5788 | case Decl::CXXConstructor: { | |||
5789 | CodeGenPGO PGO(*this); | |||
5790 | GlobalDecl GD(cast<CXXConstructorDecl>(D), Ctor_Base); | |||
5791 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
5792 | getFunctionLinkage(GD)); | |||
5793 | break; | |||
5794 | } | |||
5795 | case Decl::CXXDestructor: { | |||
5796 | CodeGenPGO PGO(*this); | |||
5797 | GlobalDecl GD(cast<CXXDestructorDecl>(D), Dtor_Base); | |||
5798 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
5799 | getFunctionLinkage(GD)); | |||
5800 | break; | |||
5801 | } | |||
5802 | default: | |||
5803 | break; | |||
5804 | }; | |||
5805 | } | |||
5806 | } | |||
5807 | ||||
5808 | void CodeGenModule::EmitMainVoidAlias() { | |||
5809 | // In order to transition away from "__original_main" gracefully, emit an | |||
5810 | // alias for "main" in the no-argument case so that libc can detect when | |||
5811 | // new-style no-argument main is in used. | |||
5812 | if (llvm::Function *F = getModule().getFunction("main")) { | |||
5813 | if (!F->isDeclaration() && F->arg_size() == 0 && !F->isVarArg() && | |||
5814 | F->getReturnType()->isIntegerTy(Context.getTargetInfo().getIntWidth())) | |||
5815 | addUsedGlobal(llvm::GlobalAlias::create("__main_void", F)); | |||
5816 | } | |||
5817 | } | |||
5818 | ||||
5819 | /// Turns the given pointer into a constant. | |||
5820 | static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, | |||
5821 | const void *Ptr) { | |||
5822 | uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); | |||
5823 | llvm::Type *i64 = llvm::Type::getInt64Ty(Context); | |||
5824 | return llvm::ConstantInt::get(i64, PtrInt); | |||
5825 | } | |||
5826 | ||||
5827 | static void EmitGlobalDeclMetadata(CodeGenModule &CGM, | |||
5828 | llvm::NamedMDNode *&GlobalMetadata, | |||
5829 | GlobalDecl D, | |||
5830 | llvm::GlobalValue *Addr) { | |||
5831 | if (!GlobalMetadata) | |||
5832 | GlobalMetadata = | |||
5833 | CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); | |||
5834 | ||||
5835 | // TODO: should we report variant information for ctors/dtors? | |||
5836 | llvm::Metadata *Ops[] = {llvm::ConstantAsMetadata::get(Addr), | |||
5837 | llvm::ConstantAsMetadata::get(GetPointerConstant( | |||
5838 | CGM.getLLVMContext(), D.getDecl()))}; | |||
5839 | GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); | |||
5840 | } | |||
5841 | ||||
5842 | /// For each function which is declared within an extern "C" region and marked | |||
5843 | /// as 'used', but has internal linkage, create an alias from the unmangled | |||
5844 | /// name to the mangled name if possible. People expect to be able to refer | |||
5845 | /// to such functions with an unmangled name from inline assembly within the | |||
5846 | /// same translation unit. | |||
5847 | void CodeGenModule::EmitStaticExternCAliases() { | |||
5848 | if (!getTargetCodeGenInfo().shouldEmitStaticExternCAliases()) | |||
5849 | return; | |||
5850 | for (auto &I : StaticExternCValues) { | |||
5851 | IdentifierInfo *Name = I.first; | |||
5852 | llvm::GlobalValue *Val = I.second; | |||
5853 | if (Val && !getModule().getNamedValue(Name->getName())) | |||
5854 | addUsedGlobal(llvm::GlobalAlias::create(Name->getName(), Val)); | |||
5855 | } | |||
5856 | } | |||
5857 | ||||
5858 | bool CodeGenModule::lookupRepresentativeDecl(StringRef MangledName, | |||
5859 | GlobalDecl &Result) const { | |||
5860 | auto Res = Manglings.find(MangledName); | |||
5861 | if (Res == Manglings.end()) | |||
5862 | return false; | |||
5863 | Result = Res->getValue(); | |||
5864 | return true; | |||
5865 | } | |||
5866 | ||||
5867 | /// Emits metadata nodes associating all the global values in the | |||
5868 | /// current module with the Decls they came from. This is useful for | |||
5869 | /// projects using IR gen as a subroutine. | |||
5870 | /// | |||
5871 | /// Since there's currently no way to associate an MDNode directly | |||
5872 | /// with an llvm::GlobalValue, we create a global named metadata | |||
5873 | /// with the name 'clang.global.decl.ptrs'. | |||
5874 | void CodeGenModule::EmitDeclMetadata() { | |||
5875 | llvm::NamedMDNode *GlobalMetadata = nullptr; | |||
5876 | ||||
5877 | for (auto &I : MangledDeclNames) { | |||
5878 | llvm::GlobalValue *Addr = getModule().getNamedValue(I.second); | |||
5879 | // Some mangled names don't necessarily have an associated GlobalValue | |||
5880 | // in this module, e.g. if we mangled it for DebugInfo. | |||
5881 | if (Addr) | |||
5882 | EmitGlobalDeclMetadata(*this, GlobalMetadata, I.first, Addr); | |||
5883 | } | |||
5884 | } | |||
5885 | ||||
5886 | /// Emits metadata nodes for all the local variables in the current | |||
5887 | /// function. | |||
5888 | void CodeGenFunction::EmitDeclMetadata() { | |||
5889 | if (LocalDeclMap.empty()) return; | |||
5890 | ||||
5891 | llvm::LLVMContext &Context = getLLVMContext(); | |||
5892 | ||||
5893 | // Find the unique metadata ID for this name. | |||
5894 | unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); | |||
5895 | ||||
5896 | llvm::NamedMDNode *GlobalMetadata = nullptr; | |||
5897 | ||||
5898 | for (auto &I : LocalDeclMap) { | |||
5899 | const Decl *D = I.first; | |||
5900 | llvm::Value *Addr = I.second.getPointer(); | |||
5901 | if (auto *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { | |||
5902 | llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); | |||
5903 | Alloca->setMetadata( | |||
5904 | DeclPtrKind, llvm::MDNode::get( | |||
5905 | Context, llvm::ValueAsMetadata::getConstant(DAddr))); | |||
5906 | } else if (auto *GV = dyn_cast<llvm::GlobalValue>(Addr)) { | |||
5907 | GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); | |||
5908 | EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); | |||
5909 | } | |||
5910 | } | |||
5911 | } | |||
5912 | ||||
5913 | void CodeGenModule::EmitVersionIdentMetadata() { | |||
5914 | llvm::NamedMDNode *IdentMetadata = | |||
5915 | TheModule.getOrInsertNamedMetadata("llvm.ident"); | |||
5916 | std::string Version = getClangFullVersion(); | |||
5917 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
5918 | ||||
5919 | llvm::Metadata *IdentNode[] = {llvm::MDString::get(Ctx, Version)}; | |||
5920 | IdentMetadata->addOperand(llvm::MDNode::get(Ctx, IdentNode)); | |||
5921 | } | |||
5922 | ||||
5923 | void CodeGenModule::EmitCommandLineMetadata() { | |||
5924 | llvm::NamedMDNode *CommandLineMetadata = | |||
5925 | TheModule.getOrInsertNamedMetadata("llvm.commandline"); | |||
5926 | std::string CommandLine = getCodeGenOpts().RecordCommandLine; | |||
5927 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
5928 | ||||
5929 | llvm::Metadata *CommandLineNode[] = {llvm::MDString::get(Ctx, CommandLine)}; | |||
5930 | CommandLineMetadata->addOperand(llvm::MDNode::get(Ctx, CommandLineNode)); | |||
5931 | } | |||
5932 | ||||
5933 | void CodeGenModule::EmitCoverageFile() { | |||
5934 | if (getCodeGenOpts().CoverageDataFile.empty() && | |||
5935 | getCodeGenOpts().CoverageNotesFile.empty()) | |||
5936 | return; | |||
5937 | ||||
5938 | llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu"); | |||
5939 | if (!CUNode) | |||
5940 | return; | |||
5941 | ||||
5942 | llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); | |||
5943 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
5944 | auto *CoverageDataFile = | |||
5945 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageDataFile); | |||
5946 | auto *CoverageNotesFile = | |||
5947 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageNotesFile); | |||
5948 | for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { | |||
5949 | llvm::MDNode *CU = CUNode->getOperand(i); | |||
5950 | llvm::Metadata *Elts[] = {CoverageNotesFile, CoverageDataFile, CU}; | |||
5951 | GCov->addOperand(llvm::MDNode::get(Ctx, Elts)); | |||
5952 | } | |||
5953 | } | |||
5954 | ||||
5955 | llvm::Constant *CodeGenModule::GetAddrOfRTTIDescriptor(QualType Ty, | |||
5956 | bool ForEH) { | |||
5957 | // Return a bogus pointer if RTTI is disabled, unless it's for EH. | |||
5958 | // FIXME: should we even be calling this method if RTTI is disabled | |||
5959 | // and it's not for EH? | |||
5960 | if ((!ForEH && !getLangOpts().RTTI) || getLangOpts().CUDAIsDevice || | |||
5961 | (getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && | |||
5962 | getTriple().isNVPTX())) | |||
5963 | return llvm::Constant::getNullValue(Int8PtrTy); | |||
5964 | ||||
5965 | if (ForEH && Ty->isObjCObjectPointerType() && | |||
5966 | LangOpts.ObjCRuntime.isGNUFamily()) | |||
5967 | return ObjCRuntime->GetEHType(Ty); | |||
5968 | ||||
5969 | return getCXXABI().getAddrOfRTTIDescriptor(Ty); | |||
5970 | } | |||
5971 | ||||
5972 | void CodeGenModule::EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D) { | |||
5973 | // Do not emit threadprivates in simd-only mode. | |||
5974 | if (LangOpts.OpenMP && LangOpts.OpenMPSimd) | |||
5975 | return; | |||
5976 | for (auto RefExpr : D->varlists()) { | |||
5977 | auto *VD = cast<VarDecl>(cast<DeclRefExpr>(RefExpr)->getDecl()); | |||
5978 | bool PerformInit = | |||
5979 | VD->getAnyInitializer() && | |||
5980 | !VD->getAnyInitializer()->isConstantInitializer(getContext(), | |||
5981 | /*ForRef=*/false); | |||
5982 | ||||
5983 | Address Addr(GetAddrOfGlobalVar(VD), getContext().getDeclAlign(VD)); | |||
5984 | if (auto InitFunction = getOpenMPRuntime().emitThreadPrivateVarDefinition( | |||
5985 | VD, Addr, RefExpr->getBeginLoc(), PerformInit)) | |||
5986 | CXXGlobalInits.push_back(InitFunction); | |||
5987 | } | |||
5988 | } | |||
5989 | ||||
5990 | llvm::Metadata * | |||
5991 | CodeGenModule::CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map, | |||
5992 | StringRef Suffix) { | |||
5993 | llvm::Metadata *&InternalId = Map[T.getCanonicalType()]; | |||
5994 | if (InternalId) | |||
5995 | return InternalId; | |||
5996 | ||||
5997 | if (isExternallyVisible(T->getLinkage())) { | |||
5998 | std::string OutName; | |||
5999 | llvm::raw_string_ostream Out(OutName); | |||
6000 | getCXXABI().getMangleContext().mangleTypeName(T, Out); | |||
6001 | Out << Suffix; | |||
6002 | ||||
6003 | InternalId = llvm::MDString::get(getLLVMContext(), Out.str()); | |||
6004 | } else { | |||
6005 | InternalId = llvm::MDNode::getDistinct(getLLVMContext(), | |||
6006 | llvm::ArrayRef<llvm::Metadata *>()); | |||
6007 | } | |||
6008 | ||||
6009 | return InternalId; | |||
6010 | } | |||
6011 | ||||
6012 | llvm::Metadata *CodeGenModule::CreateMetadataIdentifierForType(QualType T) { | |||
6013 | return CreateMetadataIdentifierImpl(T, MetadataIdMap, ""); | |||
6014 | } | |||
6015 | ||||
6016 | llvm::Metadata * | |||
6017 | CodeGenModule::CreateMetadataIdentifierForVirtualMemPtrType(QualType T) { | |||
6018 | return CreateMetadataIdentifierImpl(T, VirtualMetadataIdMap, ".virtual"); | |||
6019 | } | |||
6020 | ||||
6021 | // Generalize pointer types to a void pointer with the qualifiers of the | |||
6022 | // originally pointed-to type, e.g. 'const char *' and 'char * const *' | |||
6023 | // generalize to 'const void *' while 'char *' and 'const char **' generalize to | |||
6024 | // 'void *'. | |||
6025 | static QualType GeneralizeType(ASTContext &Ctx, QualType Ty) { | |||
6026 | if (!Ty->isPointerType()) | |||
6027 | return Ty; | |||
6028 | ||||
6029 | return Ctx.getPointerType( | |||
6030 | QualType(Ctx.VoidTy).withCVRQualifiers( | |||
6031 | Ty->getPointeeType().getCVRQualifiers())); | |||
6032 | } | |||
6033 | ||||
6034 | // Apply type generalization to a FunctionType's return and argument types | |||
6035 | static QualType GeneralizeFunctionType(ASTContext &Ctx, QualType Ty) { | |||
6036 | if (auto *FnType = Ty->getAs<FunctionProtoType>()) { | |||
6037 | SmallVector<QualType, 8> GeneralizedParams; | |||
6038 | for (auto &Param : FnType->param_types()) | |||
6039 | GeneralizedParams.push_back(GeneralizeType(Ctx, Param)); | |||
6040 | ||||
6041 | return Ctx.getFunctionType( | |||
6042 | GeneralizeType(Ctx, FnType->getReturnType()), | |||
6043 | GeneralizedParams, FnType->getExtProtoInfo()); | |||
6044 | } | |||
6045 | ||||
6046 | if (auto *FnType = Ty->getAs<FunctionNoProtoType>()) | |||
6047 | return Ctx.getFunctionNoProtoType( | |||
6048 | GeneralizeType(Ctx, FnType->getReturnType())); | |||
6049 | ||||
6050 | llvm_unreachable("Encountered unknown FunctionType")::llvm::llvm_unreachable_internal("Encountered unknown FunctionType" , "/build/llvm-toolchain-snapshot-12.0.0~++20201102111116+1ed2ca68191/clang/lib/CodeGen/CodeGenModule.cpp" , 6050); | |||
6051 | } | |||
6052 | ||||
6053 | llvm::Metadata *CodeGenModule::CreateMetadataIdentifierGeneralized(QualType T) { | |||
6054 | return CreateMetadataIdentifierImpl(GeneralizeFunctionType(getContext(), T), | |||
6055 | GeneralizedMetadataIdMap, ".generalized"); | |||
6056 | } | |||
6057 | ||||
6058 | /// Returns whether this module needs the "all-vtables" type identifier. | |||
6059 | bool CodeGenModule::NeedAllVtablesTypeId() const { | |||
6060 | // Returns true if at least one of vtable-based CFI checkers is enabled and | |||
6061 | // is not in the trapping mode. | |||
6062 | return ((LangOpts.Sanitize.has(SanitizerKind::CFIVCall) && | |||
6063 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIVCall)) || | |||
6064 | (LangOpts.Sanitize.has(SanitizerKind::CFINVCall) && | |||
6065 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFINVCall)) || | |||
6066 | (LangOpts.Sanitize.has(SanitizerKind::CFIDerivedCast) && | |||
6067 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIDerivedCast)) || | |||
6068 | (LangOpts.Sanitize.has(SanitizerKind::CFIUnrelatedCast) && | |||
6069 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIUnrelatedCast))); | |||
6070 | } | |||
6071 | ||||
6072 | void CodeGenModule::AddVTableTypeMetadata(llvm::GlobalVariable *VTable, | |||
6073 | CharUnits Offset, | |||
6074 | const CXXRecordDecl *RD) { | |||
6075 | llvm::Metadata *MD = | |||
6076 | CreateMetadataIdentifierForType(QualType(RD->getTypeForDecl(), 0)); | |||
6077 | VTable->addTypeMetadata(Offset.getQuantity(), MD); | |||
6078 | ||||
6079 | if (CodeGenOpts.SanitizeCfiCrossDso) | |||
6080 | if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD)) | |||
6081 | VTable->addTypeMetadata(Offset.getQuantity(), | |||
6082 | llvm::ConstantAsMetadata::get(CrossDsoTypeId)); | |||
6083 | ||||
6084 | if (NeedAllVtablesTypeId()) { | |||
6085 | llvm::Metadata *MD = llvm::MDString::get(getLLVMContext(), "all-vtables"); | |||
6086 | VTable->addTypeMetadata(Offset.getQuantity(), MD); | |||
6087 | } | |||
6088 | } | |||
6089 | ||||
6090 | llvm::SanitizerStatReport &CodeGenModule::getSanStats() { | |||
6091 | if (!SanStats) | |||
6092 | SanStats = std::make_unique<llvm::SanitizerStatReport>(&getModule()); | |||
6093 | ||||
6094 | return *SanStats; | |||
6095 | } | |||
6096 | llvm::Value * | |||
6097 | CodeGenModule::createOpenCLIntToSamplerConversion(const Expr *E, | |||
6098 | CodeGenFunction &CGF) { | |||
6099 | llvm::Constant *C = ConstantEmitter(CGF).emitAbstract(E, E->getType()); | |||
6100 | auto SamplerT = getOpenCLRuntime().getSamplerType(E->getType().getTypePtr()); | |||
6101 | auto FTy = llvm::FunctionType::get(SamplerT, {C->getType()}, false); | |||
6102 | return CGF.Builder.CreateCall(CreateRuntimeFunction(FTy, | |||
6103 | "__translate_sampler_initializer"), | |||
6104 | {C}); | |||
6105 | } | |||
6106 | ||||
6107 | CharUnits CodeGenModule::getNaturalPointeeTypeAlignment( | |||
6108 | QualType T, LValueBaseInfo *BaseInfo, TBAAAccessInfo *TBAAInfo) { | |||
6109 | return getNaturalTypeAlignment(T->getPointeeType(), BaseInfo, TBAAInfo, | |||
6110 | /* forPointeeType= */ true); | |||
6111 | } | |||
6112 | ||||
6113 | CharUnits CodeGenModule::getNaturalTypeAlignment(QualType T, | |||
6114 | LValueBaseInfo *BaseInfo, | |||
6115 | TBAAAccessInfo *TBAAInfo, | |||
6116 | bool forPointeeType) { | |||
6117 | if (TBAAInfo) | |||
6118 | *TBAAInfo = getTBAAAccessInfo(T); | |||
6119 | ||||
6120 | // FIXME: This duplicates logic in ASTContext::getTypeAlignIfKnown. But | |||
6121 | // that doesn't return the information we need to compute BaseInfo. | |||
6122 | ||||
6123 | // Honor alignment typedef attributes even on incomplete types. | |||
6124 | // We also honor them straight for C++ class types, even as pointees; | |||
6125 | // there's an expressivity gap here. | |||
6126 | if (auto TT = T->getAs<TypedefType>()) { | |||
6127 | if (auto Align = TT->getDecl()->getMaxAlignment()) { | |||
6128 | if (BaseInfo) | |||
6129 | *BaseInfo = LValueBaseInfo(AlignmentSource::AttributedType); | |||
6130 | return getContext().toCharUnitsFromBits(Align); | |||
6131 | } | |||
6132 | } | |||
6133 | ||||
6134 | bool AlignForArray = T->isArrayType(); | |||
6135 | ||||
6136 | // Analyze the base element type, so we don't get confused by incomplete | |||
6137 | // array types. | |||
6138 | T = getContext().getBaseElementType(T); | |||
6139 | ||||
6140 | if (T->isIncompleteType()) { | |||
6141 | // We could try to replicate the logic from | |||
6142 | // ASTContext::getTypeAlignIfKnown, but nothing uses the alignment if the | |||
6143 | // type is incomplete, so it's impossible to test. We could try to reuse | |||
6144 | // getTypeAlignIfKnown, but that doesn't return the information we need | |||
6145 | // to set BaseInfo. So just ignore the possibility that the alignment is | |||
6146 | // greater than one. | |||
6147 | if (BaseInfo) | |||
6148 | *BaseInfo = LValueBaseInfo(AlignmentSource::Type); | |||
6149 | return CharUnits::One(); | |||
6150 | } | |||
6151 | ||||
6152 | if (BaseInfo) | |||
6153 | *BaseInfo = LValueBaseInfo(AlignmentSource::Type); | |||
6154 | ||||
6155 | CharUnits Alignment; | |||
6156 | // For C++ class pointees, we don't know whether we're pointing at a | |||
6157 | // base or a complete object, so we generally need to use the | |||
6158 | // non-virtual alignment. | |||
6159 | const CXXRecordDecl *RD; | |||
6160 | if (forPointeeType && !AlignForArray && (RD = T->getAsCXXRecordDecl())) { | |||
6161 | Alignment = getClassPointerAlignment(RD); | |||
6162 | } else { | |||
6163 | Alignment = getContext().getTypeAlignInChars(T); | |||
6164 | if (T.getQualifiers().hasUnaligned()) | |||
6165 | Alignment = CharUnits::One(); | |||
6166 | } | |||
6167 | ||||
6168 | // Cap to the global maximum type alignment unless the alignment | |||
6169 | // was somehow explicit on the type. | |||
6170 | if (unsigned MaxAlign = getLangOpts().MaxTypeAlign) { | |||
6171 | if (Alignment.getQuantity() > MaxAlign && | |||
6172 | !getContext().isAlignmentRequired(T)) | |||
6173 | Alignment = CharUnits::fromQuantity(MaxAlign); | |||
6174 | } | |||
6175 | return Alignment; | |||
6176 | } | |||
6177 | ||||
6178 | bool CodeGenModule::stopAutoInit() { | |||
6179 | unsigned StopAfter = getContext().getLangOpts().TrivialAutoVarInitStopAfter; | |||
6180 | if (StopAfter) { | |||
6181 | // This number is positive only when -ftrivial-auto-var-init-stop-after=* is | |||
6182 | // used | |||
6183 | if (NumAutoVarInit >= StopAfter) { | |||
6184 | return true; | |||
6185 | } | |||
6186 | if (!NumAutoVarInit) { | |||
6187 | unsigned DiagID = getDiags().getCustomDiagID( | |||
6188 | DiagnosticsEngine::Warning, | |||
6189 | "-ftrivial-auto-var-init-stop-after=%0 has been enabled to limit the " | |||
6190 | "number of times ftrivial-auto-var-init=%1 gets applied."); | |||
6191 | getDiags().Report(DiagID) | |||
6192 | << StopAfter | |||
6193 | << (getContext().getLangOpts().getTrivialAutoVarInit() == | |||
6194 | LangOptions::TrivialAutoVarInitKind::Zero | |||
6195 | ? "zero" | |||
6196 | : "pattern"); | |||
6197 | } | |||
6198 | ++NumAutoVarInit; | |||
6199 | } | |||
6200 | return false; | |||
6201 | } |