File: | build/source/clang/lib/CodeGen/CodeGenModule.cpp |
Warning: | line 6085, column 9 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 "ABIInfo.h" | |||
15 | #include "CGBlocks.h" | |||
16 | #include "CGCUDARuntime.h" | |||
17 | #include "CGCXXABI.h" | |||
18 | #include "CGCall.h" | |||
19 | #include "CGDebugInfo.h" | |||
20 | #include "CGHLSLRuntime.h" | |||
21 | #include "CGObjCRuntime.h" | |||
22 | #include "CGOpenCLRuntime.h" | |||
23 | #include "CGOpenMPRuntime.h" | |||
24 | #include "CGOpenMPRuntimeGPU.h" | |||
25 | #include "CodeGenFunction.h" | |||
26 | #include "CodeGenPGO.h" | |||
27 | #include "ConstantEmitter.h" | |||
28 | #include "CoverageMappingGen.h" | |||
29 | #include "TargetInfo.h" | |||
30 | #include "clang/AST/ASTContext.h" | |||
31 | #include "clang/AST/CharUnits.h" | |||
32 | #include "clang/AST/DeclCXX.h" | |||
33 | #include "clang/AST/DeclObjC.h" | |||
34 | #include "clang/AST/DeclTemplate.h" | |||
35 | #include "clang/AST/Mangle.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/BackendUtil.h" | |||
48 | #include "clang/CodeGen/ConstantInitBuilder.h" | |||
49 | #include "clang/Frontend/FrontendDiagnostic.h" | |||
50 | #include "llvm/ADT/STLExtras.h" | |||
51 | #include "llvm/ADT/StringExtras.h" | |||
52 | #include "llvm/ADT/StringSwitch.h" | |||
53 | #include "llvm/ADT/Triple.h" | |||
54 | #include "llvm/Analysis/TargetLibraryInfo.h" | |||
55 | #include "llvm/Frontend/OpenMP/OMPIRBuilder.h" | |||
56 | #include "llvm/IR/CallingConv.h" | |||
57 | #include "llvm/IR/DataLayout.h" | |||
58 | #include "llvm/IR/Intrinsics.h" | |||
59 | #include "llvm/IR/LLVMContext.h" | |||
60 | #include "llvm/IR/Module.h" | |||
61 | #include "llvm/IR/ProfileSummary.h" | |||
62 | #include "llvm/ProfileData/InstrProfReader.h" | |||
63 | #include "llvm/ProfileData/SampleProf.h" | |||
64 | #include "llvm/Support/CRC.h" | |||
65 | #include "llvm/Support/CodeGen.h" | |||
66 | #include "llvm/Support/CommandLine.h" | |||
67 | #include "llvm/Support/ConvertUTF.h" | |||
68 | #include "llvm/Support/ErrorHandling.h" | |||
69 | #include "llvm/Support/TimeProfiler.h" | |||
70 | #include "llvm/Support/X86TargetParser.h" | |||
71 | #include "llvm/Support/xxhash.h" | |||
72 | #include <optional> | |||
73 | ||||
74 | using namespace clang; | |||
75 | using namespace CodeGen; | |||
76 | ||||
77 | static llvm::cl::opt<bool> LimitedCoverage( | |||
78 | "limited-coverage-experimental", llvm::cl::Hidden, | |||
79 | llvm::cl::desc("Emit limited coverage mapping information (experimental)")); | |||
80 | ||||
81 | static const char AnnotationSection[] = "llvm.metadata"; | |||
82 | ||||
83 | static CGCXXABI *createCXXABI(CodeGenModule &CGM) { | |||
84 | switch (CGM.getContext().getCXXABIKind()) { | |||
85 | case TargetCXXABI::AppleARM64: | |||
86 | case TargetCXXABI::Fuchsia: | |||
87 | case TargetCXXABI::GenericAArch64: | |||
88 | case TargetCXXABI::GenericARM: | |||
89 | case TargetCXXABI::iOS: | |||
90 | case TargetCXXABI::WatchOS: | |||
91 | case TargetCXXABI::GenericMIPS: | |||
92 | case TargetCXXABI::GenericItanium: | |||
93 | case TargetCXXABI::WebAssembly: | |||
94 | case TargetCXXABI::XL: | |||
95 | return CreateItaniumCXXABI(CGM); | |||
96 | case TargetCXXABI::Microsoft: | |||
97 | return CreateMicrosoftCXXABI(CGM); | |||
98 | } | |||
99 | ||||
100 | llvm_unreachable("invalid C++ ABI kind")::llvm::llvm_unreachable_internal("invalid C++ ABI kind", "clang/lib/CodeGen/CodeGenModule.cpp" , 100); | |||
101 | } | |||
102 | ||||
103 | CodeGenModule::CodeGenModule(ASTContext &C, | |||
104 | IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS, | |||
105 | const HeaderSearchOptions &HSO, | |||
106 | const PreprocessorOptions &PPO, | |||
107 | const CodeGenOptions &CGO, llvm::Module &M, | |||
108 | DiagnosticsEngine &diags, | |||
109 | CoverageSourceInfo *CoverageInfo) | |||
110 | : Context(C), LangOpts(C.getLangOpts()), FS(FS), HeaderSearchOpts(HSO), | |||
111 | PreprocessorOpts(PPO), CodeGenOpts(CGO), TheModule(M), Diags(diags), | |||
112 | Target(C.getTargetInfo()), ABI(createCXXABI(*this)), | |||
113 | VMContext(M.getContext()), Types(*this), VTables(*this), | |||
114 | SanitizerMD(new SanitizerMetadata(*this)) { | |||
115 | ||||
116 | // Initialize the type cache. | |||
117 | llvm::LLVMContext &LLVMContext = M.getContext(); | |||
118 | VoidTy = llvm::Type::getVoidTy(LLVMContext); | |||
119 | Int8Ty = llvm::Type::getInt8Ty(LLVMContext); | |||
120 | Int16Ty = llvm::Type::getInt16Ty(LLVMContext); | |||
121 | Int32Ty = llvm::Type::getInt32Ty(LLVMContext); | |||
122 | Int64Ty = llvm::Type::getInt64Ty(LLVMContext); | |||
123 | HalfTy = llvm::Type::getHalfTy(LLVMContext); | |||
124 | BFloatTy = llvm::Type::getBFloatTy(LLVMContext); | |||
125 | FloatTy = llvm::Type::getFloatTy(LLVMContext); | |||
126 | DoubleTy = llvm::Type::getDoubleTy(LLVMContext); | |||
127 | PointerWidthInBits = C.getTargetInfo().getPointerWidth(LangAS::Default); | |||
128 | PointerAlignInBytes = | |||
129 | C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(LangAS::Default)) | |||
130 | .getQuantity(); | |||
131 | SizeSizeInBytes = | |||
132 | C.toCharUnitsFromBits(C.getTargetInfo().getMaxPointerWidth()).getQuantity(); | |||
133 | IntAlignInBytes = | |||
134 | C.toCharUnitsFromBits(C.getTargetInfo().getIntAlign()).getQuantity(); | |||
135 | CharTy = | |||
136 | llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getCharWidth()); | |||
137 | IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); | |||
138 | IntPtrTy = llvm::IntegerType::get(LLVMContext, | |||
139 | C.getTargetInfo().getMaxPointerWidth()); | |||
140 | Int8PtrTy = Int8Ty->getPointerTo(0); | |||
141 | Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); | |||
142 | const llvm::DataLayout &DL = M.getDataLayout(); | |||
143 | AllocaInt8PtrTy = Int8Ty->getPointerTo(DL.getAllocaAddrSpace()); | |||
144 | GlobalsInt8PtrTy = Int8Ty->getPointerTo(DL.getDefaultGlobalsAddressSpace()); | |||
145 | ConstGlobalsPtrTy = Int8Ty->getPointerTo( | |||
146 | C.getTargetAddressSpace(GetGlobalConstantAddressSpace())); | |||
147 | ASTAllocaAddressSpace = getTargetCodeGenInfo().getASTAllocaAddressSpace(); | |||
148 | ||||
149 | // Build C++20 Module initializers. | |||
150 | // TODO: Add Microsoft here once we know the mangling required for the | |||
151 | // initializers. | |||
152 | CXX20ModuleInits = | |||
153 | LangOpts.CPlusPlusModules && getCXXABI().getMangleContext().getKind() == | |||
154 | ItaniumMangleContext::MK_Itanium; | |||
155 | ||||
156 | RuntimeCC = getTargetCodeGenInfo().getABIInfo().getRuntimeCC(); | |||
157 | ||||
158 | if (LangOpts.ObjC) | |||
159 | createObjCRuntime(); | |||
160 | if (LangOpts.OpenCL) | |||
161 | createOpenCLRuntime(); | |||
162 | if (LangOpts.OpenMP) | |||
163 | createOpenMPRuntime(); | |||
164 | if (LangOpts.CUDA) | |||
165 | createCUDARuntime(); | |||
166 | if (LangOpts.HLSL) | |||
167 | createHLSLRuntime(); | |||
168 | ||||
169 | // Enable TBAA unless it's suppressed. ThreadSanitizer needs TBAA even at O0. | |||
170 | if (LangOpts.Sanitize.has(SanitizerKind::Thread) || | |||
171 | (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0)) | |||
172 | TBAA.reset(new CodeGenTBAA(Context, TheModule, CodeGenOpts, getLangOpts(), | |||
173 | getCXXABI().getMangleContext())); | |||
174 | ||||
175 | // If debug info or coverage generation is enabled, create the CGDebugInfo | |||
176 | // object. | |||
177 | if (CodeGenOpts.getDebugInfo() != codegenoptions::NoDebugInfo || | |||
178 | CodeGenOpts.EmitGcovArcs || CodeGenOpts.EmitGcovNotes) | |||
179 | DebugInfo.reset(new CGDebugInfo(*this)); | |||
180 | ||||
181 | Block.GlobalUniqueCount = 0; | |||
182 | ||||
183 | if (C.getLangOpts().ObjC) | |||
184 | ObjCData.reset(new ObjCEntrypoints()); | |||
185 | ||||
186 | if (CodeGenOpts.hasProfileClangUse()) { | |||
187 | auto ReaderOrErr = llvm::IndexedInstrProfReader::create( | |||
188 | CodeGenOpts.ProfileInstrumentUsePath, *FS, | |||
189 | CodeGenOpts.ProfileRemappingFile); | |||
190 | // We're checking for profile read errors in CompilerInvocation, so if | |||
191 | // there was an error it should've already been caught. If it hasn't been | |||
192 | // somehow, trip an assertion. | |||
193 | assert(ReaderOrErr)(static_cast <bool> (ReaderOrErr) ? void (0) : __assert_fail ("ReaderOrErr", "clang/lib/CodeGen/CodeGenModule.cpp", 193, __extension__ __PRETTY_FUNCTION__)); | |||
194 | PGOReader = std::move(ReaderOrErr.get()); | |||
195 | } | |||
196 | ||||
197 | // If coverage mapping generation is enabled, create the | |||
198 | // CoverageMappingModuleGen object. | |||
199 | if (CodeGenOpts.CoverageMapping) | |||
200 | CoverageMapping.reset(new CoverageMappingModuleGen(*this, *CoverageInfo)); | |||
201 | ||||
202 | // Generate the module name hash here if needed. | |||
203 | if (CodeGenOpts.UniqueInternalLinkageNames && | |||
204 | !getModule().getSourceFileName().empty()) { | |||
205 | std::string Path = getModule().getSourceFileName(); | |||
206 | // Check if a path substitution is needed from the MacroPrefixMap. | |||
207 | for (const auto &Entry : LangOpts.MacroPrefixMap) | |||
208 | if (Path.rfind(Entry.first, 0) != std::string::npos) { | |||
209 | Path = Entry.second + Path.substr(Entry.first.size()); | |||
210 | break; | |||
211 | } | |||
212 | ModuleNameHash = llvm::getUniqueInternalLinkagePostfix(Path); | |||
213 | } | |||
214 | } | |||
215 | ||||
216 | CodeGenModule::~CodeGenModule() {} | |||
217 | ||||
218 | void CodeGenModule::createObjCRuntime() { | |||
219 | // This is just isGNUFamily(), but we want to force implementors of | |||
220 | // new ABIs to decide how best to do this. | |||
221 | switch (LangOpts.ObjCRuntime.getKind()) { | |||
222 | case ObjCRuntime::GNUstep: | |||
223 | case ObjCRuntime::GCC: | |||
224 | case ObjCRuntime::ObjFW: | |||
225 | ObjCRuntime.reset(CreateGNUObjCRuntime(*this)); | |||
226 | return; | |||
227 | ||||
228 | case ObjCRuntime::FragileMacOSX: | |||
229 | case ObjCRuntime::MacOSX: | |||
230 | case ObjCRuntime::iOS: | |||
231 | case ObjCRuntime::WatchOS: | |||
232 | ObjCRuntime.reset(CreateMacObjCRuntime(*this)); | |||
233 | return; | |||
234 | } | |||
235 | llvm_unreachable("bad runtime kind")::llvm::llvm_unreachable_internal("bad runtime kind", "clang/lib/CodeGen/CodeGenModule.cpp" , 235); | |||
236 | } | |||
237 | ||||
238 | void CodeGenModule::createOpenCLRuntime() { | |||
239 | OpenCLRuntime.reset(new CGOpenCLRuntime(*this)); | |||
240 | } | |||
241 | ||||
242 | void CodeGenModule::createOpenMPRuntime() { | |||
243 | // Select a specialized code generation class based on the target, if any. | |||
244 | // If it does not exist use the default implementation. | |||
245 | switch (getTriple().getArch()) { | |||
246 | case llvm::Triple::nvptx: | |||
247 | case llvm::Triple::nvptx64: | |||
248 | case llvm::Triple::amdgcn: | |||
249 | assert(getLangOpts().OpenMPIsDevice &&(static_cast <bool> (getLangOpts().OpenMPIsDevice && "OpenMP AMDGPU/NVPTX is only prepared to deal with device code." ) ? void (0) : __assert_fail ("getLangOpts().OpenMPIsDevice && \"OpenMP AMDGPU/NVPTX is only prepared to deal with device code.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 250, __extension__ __PRETTY_FUNCTION__ )) | |||
250 | "OpenMP AMDGPU/NVPTX is only prepared to deal with device code.")(static_cast <bool> (getLangOpts().OpenMPIsDevice && "OpenMP AMDGPU/NVPTX is only prepared to deal with device code." ) ? void (0) : __assert_fail ("getLangOpts().OpenMPIsDevice && \"OpenMP AMDGPU/NVPTX is only prepared to deal with device code.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 250, __extension__ __PRETTY_FUNCTION__ )); | |||
251 | OpenMPRuntime.reset(new CGOpenMPRuntimeGPU(*this)); | |||
252 | break; | |||
253 | default: | |||
254 | if (LangOpts.OpenMPSimd) | |||
255 | OpenMPRuntime.reset(new CGOpenMPSIMDRuntime(*this)); | |||
256 | else | |||
257 | OpenMPRuntime.reset(new CGOpenMPRuntime(*this)); | |||
258 | break; | |||
259 | } | |||
260 | } | |||
261 | ||||
262 | void CodeGenModule::createCUDARuntime() { | |||
263 | CUDARuntime.reset(CreateNVCUDARuntime(*this)); | |||
264 | } | |||
265 | ||||
266 | void CodeGenModule::createHLSLRuntime() { | |||
267 | HLSLRuntime.reset(new CGHLSLRuntime(*this)); | |||
268 | } | |||
269 | ||||
270 | void CodeGenModule::addReplacement(StringRef Name, llvm::Constant *C) { | |||
271 | Replacements[Name] = C; | |||
272 | } | |||
273 | ||||
274 | void CodeGenModule::applyReplacements() { | |||
275 | for (auto &I : Replacements) { | |||
276 | StringRef MangledName = I.first(); | |||
277 | llvm::Constant *Replacement = I.second; | |||
278 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
279 | if (!Entry) | |||
280 | continue; | |||
281 | auto *OldF = cast<llvm::Function>(Entry); | |||
282 | auto *NewF = dyn_cast<llvm::Function>(Replacement); | |||
283 | if (!NewF) { | |||
284 | if (auto *Alias = dyn_cast<llvm::GlobalAlias>(Replacement)) { | |||
285 | NewF = dyn_cast<llvm::Function>(Alias->getAliasee()); | |||
286 | } else { | |||
287 | auto *CE = cast<llvm::ConstantExpr>(Replacement); | |||
288 | assert(CE->getOpcode() == llvm::Instruction::BitCast ||(static_cast <bool> (CE->getOpcode() == llvm::Instruction ::BitCast || CE->getOpcode() == llvm::Instruction::GetElementPtr ) ? void (0) : __assert_fail ("CE->getOpcode() == llvm::Instruction::BitCast || CE->getOpcode() == llvm::Instruction::GetElementPtr" , "clang/lib/CodeGen/CodeGenModule.cpp", 289, __extension__ __PRETTY_FUNCTION__ )) | |||
289 | CE->getOpcode() == llvm::Instruction::GetElementPtr)(static_cast <bool> (CE->getOpcode() == llvm::Instruction ::BitCast || CE->getOpcode() == llvm::Instruction::GetElementPtr ) ? void (0) : __assert_fail ("CE->getOpcode() == llvm::Instruction::BitCast || CE->getOpcode() == llvm::Instruction::GetElementPtr" , "clang/lib/CodeGen/CodeGenModule.cpp", 289, __extension__ __PRETTY_FUNCTION__ )); | |||
290 | NewF = dyn_cast<llvm::Function>(CE->getOperand(0)); | |||
291 | } | |||
292 | } | |||
293 | ||||
294 | // Replace old with new, but keep the old order. | |||
295 | OldF->replaceAllUsesWith(Replacement); | |||
296 | if (NewF) { | |||
297 | NewF->removeFromParent(); | |||
298 | OldF->getParent()->getFunctionList().insertAfter(OldF->getIterator(), | |||
299 | NewF); | |||
300 | } | |||
301 | OldF->eraseFromParent(); | |||
302 | } | |||
303 | } | |||
304 | ||||
305 | void CodeGenModule::addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C) { | |||
306 | GlobalValReplacements.push_back(std::make_pair(GV, C)); | |||
307 | } | |||
308 | ||||
309 | void CodeGenModule::applyGlobalValReplacements() { | |||
310 | for (auto &I : GlobalValReplacements) { | |||
311 | llvm::GlobalValue *GV = I.first; | |||
312 | llvm::Constant *C = I.second; | |||
313 | ||||
314 | GV->replaceAllUsesWith(C); | |||
315 | GV->eraseFromParent(); | |||
316 | } | |||
317 | } | |||
318 | ||||
319 | // This is only used in aliases that we created and we know they have a | |||
320 | // linear structure. | |||
321 | static const llvm::GlobalValue *getAliasedGlobal(const llvm::GlobalValue *GV) { | |||
322 | const llvm::Constant *C; | |||
323 | if (auto *GA = dyn_cast<llvm::GlobalAlias>(GV)) | |||
324 | C = GA->getAliasee(); | |||
325 | else if (auto *GI = dyn_cast<llvm::GlobalIFunc>(GV)) | |||
326 | C = GI->getResolver(); | |||
327 | else | |||
328 | return GV; | |||
329 | ||||
330 | const auto *AliaseeGV = dyn_cast<llvm::GlobalValue>(C->stripPointerCasts()); | |||
331 | if (!AliaseeGV) | |||
332 | return nullptr; | |||
333 | ||||
334 | const llvm::GlobalValue *FinalGV = AliaseeGV->getAliaseeObject(); | |||
335 | if (FinalGV == GV) | |||
336 | return nullptr; | |||
337 | ||||
338 | return FinalGV; | |||
339 | } | |||
340 | ||||
341 | static bool checkAliasedGlobal(DiagnosticsEngine &Diags, | |||
342 | SourceLocation Location, bool IsIFunc, | |||
343 | const llvm::GlobalValue *Alias, | |||
344 | const llvm::GlobalValue *&GV) { | |||
345 | GV = getAliasedGlobal(Alias); | |||
346 | if (!GV) { | |||
347 | Diags.Report(Location, diag::err_cyclic_alias) << IsIFunc; | |||
348 | return false; | |||
349 | } | |||
350 | ||||
351 | if (GV->isDeclaration()) { | |||
352 | Diags.Report(Location, diag::err_alias_to_undefined) << IsIFunc << IsIFunc; | |||
353 | return false; | |||
354 | } | |||
355 | ||||
356 | if (IsIFunc) { | |||
357 | // Check resolver function type. | |||
358 | const auto *F = dyn_cast<llvm::Function>(GV); | |||
359 | if (!F) { | |||
360 | Diags.Report(Location, diag::err_alias_to_undefined) | |||
361 | << IsIFunc << IsIFunc; | |||
362 | return false; | |||
363 | } | |||
364 | ||||
365 | llvm::FunctionType *FTy = F->getFunctionType(); | |||
366 | if (!FTy->getReturnType()->isPointerTy()) { | |||
367 | Diags.Report(Location, diag::err_ifunc_resolver_return); | |||
368 | return false; | |||
369 | } | |||
370 | } | |||
371 | ||||
372 | return true; | |||
373 | } | |||
374 | ||||
375 | void CodeGenModule::checkAliases() { | |||
376 | // Check if the constructed aliases are well formed. It is really unfortunate | |||
377 | // that we have to do this in CodeGen, but we only construct mangled names | |||
378 | // and aliases during codegen. | |||
379 | bool Error = false; | |||
380 | DiagnosticsEngine &Diags = getDiags(); | |||
381 | for (const GlobalDecl &GD : Aliases) { | |||
382 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
383 | SourceLocation Location; | |||
384 | bool IsIFunc = D->hasAttr<IFuncAttr>(); | |||
385 | if (const Attr *A = D->getDefiningAttr()) | |||
386 | Location = A->getLocation(); | |||
387 | else | |||
388 | llvm_unreachable("Not an alias or ifunc?")::llvm::llvm_unreachable_internal("Not an alias or ifunc?", "clang/lib/CodeGen/CodeGenModule.cpp" , 388); | |||
389 | ||||
390 | StringRef MangledName = getMangledName(GD); | |||
391 | llvm::GlobalValue *Alias = GetGlobalValue(MangledName); | |||
392 | const llvm::GlobalValue *GV = nullptr; | |||
393 | if (!checkAliasedGlobal(Diags, Location, IsIFunc, Alias, GV)) { | |||
394 | Error = true; | |||
395 | continue; | |||
396 | } | |||
397 | ||||
398 | llvm::Constant *Aliasee = | |||
399 | IsIFunc ? cast<llvm::GlobalIFunc>(Alias)->getResolver() | |||
400 | : cast<llvm::GlobalAlias>(Alias)->getAliasee(); | |||
401 | ||||
402 | llvm::GlobalValue *AliaseeGV; | |||
403 | if (auto CE = dyn_cast<llvm::ConstantExpr>(Aliasee)) | |||
404 | AliaseeGV = cast<llvm::GlobalValue>(CE->getOperand(0)); | |||
405 | else | |||
406 | AliaseeGV = cast<llvm::GlobalValue>(Aliasee); | |||
407 | ||||
408 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) { | |||
409 | StringRef AliasSection = SA->getName(); | |||
410 | if (AliasSection != AliaseeGV->getSection()) | |||
411 | Diags.Report(SA->getLocation(), diag::warn_alias_with_section) | |||
412 | << AliasSection << IsIFunc << IsIFunc; | |||
413 | } | |||
414 | ||||
415 | // We have to handle alias to weak aliases in here. LLVM itself disallows | |||
416 | // this since the object semantics would not match the IL one. For | |||
417 | // compatibility with gcc we implement it by just pointing the alias | |||
418 | // to its aliasee's aliasee. We also warn, since the user is probably | |||
419 | // expecting the link to be weak. | |||
420 | if (auto *GA = dyn_cast<llvm::GlobalAlias>(AliaseeGV)) { | |||
421 | if (GA->isInterposable()) { | |||
422 | Diags.Report(Location, diag::warn_alias_to_weak_alias) | |||
423 | << GV->getName() << GA->getName() << IsIFunc; | |||
424 | Aliasee = llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
425 | GA->getAliasee(), Alias->getType()); | |||
426 | ||||
427 | if (IsIFunc) | |||
428 | cast<llvm::GlobalIFunc>(Alias)->setResolver(Aliasee); | |||
429 | else | |||
430 | cast<llvm::GlobalAlias>(Alias)->setAliasee(Aliasee); | |||
431 | } | |||
432 | } | |||
433 | } | |||
434 | if (!Error) | |||
435 | return; | |||
436 | ||||
437 | for (const GlobalDecl &GD : Aliases) { | |||
438 | StringRef MangledName = getMangledName(GD); | |||
439 | llvm::GlobalValue *Alias = GetGlobalValue(MangledName); | |||
440 | Alias->replaceAllUsesWith(llvm::UndefValue::get(Alias->getType())); | |||
441 | Alias->eraseFromParent(); | |||
442 | } | |||
443 | } | |||
444 | ||||
445 | void CodeGenModule::clear() { | |||
446 | DeferredDeclsToEmit.clear(); | |||
447 | EmittedDeferredDecls.clear(); | |||
448 | if (OpenMPRuntime) | |||
449 | OpenMPRuntime->clear(); | |||
450 | } | |||
451 | ||||
452 | void InstrProfStats::reportDiagnostics(DiagnosticsEngine &Diags, | |||
453 | StringRef MainFile) { | |||
454 | if (!hasDiagnostics()) | |||
455 | return; | |||
456 | if (VisitedInMainFile > 0 && VisitedInMainFile == MissingInMainFile) { | |||
457 | if (MainFile.empty()) | |||
458 | MainFile = "<stdin>"; | |||
459 | Diags.Report(diag::warn_profile_data_unprofiled) << MainFile; | |||
460 | } else { | |||
461 | if (Mismatched > 0) | |||
462 | Diags.Report(diag::warn_profile_data_out_of_date) << Visited << Mismatched; | |||
463 | ||||
464 | if (Missing > 0) | |||
465 | Diags.Report(diag::warn_profile_data_missing) << Visited << Missing; | |||
466 | } | |||
467 | } | |||
468 | ||||
469 | static void setVisibilityFromDLLStorageClass(const clang::LangOptions &LO, | |||
470 | llvm::Module &M) { | |||
471 | if (!LO.VisibilityFromDLLStorageClass) | |||
472 | return; | |||
473 | ||||
474 | llvm::GlobalValue::VisibilityTypes DLLExportVisibility = | |||
475 | CodeGenModule::GetLLVMVisibility(LO.getDLLExportVisibility()); | |||
476 | llvm::GlobalValue::VisibilityTypes NoDLLStorageClassVisibility = | |||
477 | CodeGenModule::GetLLVMVisibility(LO.getNoDLLStorageClassVisibility()); | |||
478 | llvm::GlobalValue::VisibilityTypes ExternDeclDLLImportVisibility = | |||
479 | CodeGenModule::GetLLVMVisibility(LO.getExternDeclDLLImportVisibility()); | |||
480 | llvm::GlobalValue::VisibilityTypes ExternDeclNoDLLStorageClassVisibility = | |||
481 | CodeGenModule::GetLLVMVisibility( | |||
482 | LO.getExternDeclNoDLLStorageClassVisibility()); | |||
483 | ||||
484 | for (llvm::GlobalValue &GV : M.global_values()) { | |||
485 | if (GV.hasAppendingLinkage() || GV.hasLocalLinkage()) | |||
486 | continue; | |||
487 | ||||
488 | // Reset DSO locality before setting the visibility. This removes | |||
489 | // any effects that visibility options and annotations may have | |||
490 | // had on the DSO locality. Setting the visibility will implicitly set | |||
491 | // appropriate globals to DSO Local; however, this will be pessimistic | |||
492 | // w.r.t. to the normal compiler IRGen. | |||
493 | GV.setDSOLocal(false); | |||
494 | ||||
495 | if (GV.isDeclarationForLinker()) { | |||
496 | GV.setVisibility(GV.getDLLStorageClass() == | |||
497 | llvm::GlobalValue::DLLImportStorageClass | |||
498 | ? ExternDeclDLLImportVisibility | |||
499 | : ExternDeclNoDLLStorageClassVisibility); | |||
500 | } else { | |||
501 | GV.setVisibility(GV.getDLLStorageClass() == | |||
502 | llvm::GlobalValue::DLLExportStorageClass | |||
503 | ? DLLExportVisibility | |||
504 | : NoDLLStorageClassVisibility); | |||
505 | } | |||
506 | ||||
507 | GV.setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
508 | } | |||
509 | } | |||
510 | ||||
511 | void CodeGenModule::Release() { | |||
512 | Module *Primary = getContext().getModuleForCodeGen(); | |||
513 | if (CXX20ModuleInits && Primary && !Primary->isHeaderLikeModule()) | |||
514 | EmitModuleInitializers(Primary); | |||
515 | EmitDeferred(); | |||
516 | DeferredDecls.insert(EmittedDeferredDecls.begin(), | |||
517 | EmittedDeferredDecls.end()); | |||
518 | EmittedDeferredDecls.clear(); | |||
519 | EmitVTablesOpportunistically(); | |||
520 | applyGlobalValReplacements(); | |||
521 | applyReplacements(); | |||
522 | emitMultiVersionFunctions(); | |||
523 | ||||
524 | if (Context.getLangOpts().IncrementalExtensions && | |||
525 | GlobalTopLevelStmtBlockInFlight.first) { | |||
526 | const TopLevelStmtDecl *TLSD = GlobalTopLevelStmtBlockInFlight.second; | |||
527 | GlobalTopLevelStmtBlockInFlight.first->FinishFunction(TLSD->getEndLoc()); | |||
528 | GlobalTopLevelStmtBlockInFlight = {nullptr, nullptr}; | |||
529 | } | |||
530 | ||||
531 | if (CXX20ModuleInits && Primary && Primary->isInterfaceOrPartition()) | |||
532 | EmitCXXModuleInitFunc(Primary); | |||
533 | else | |||
534 | EmitCXXGlobalInitFunc(); | |||
535 | EmitCXXGlobalCleanUpFunc(); | |||
536 | registerGlobalDtorsWithAtExit(); | |||
537 | EmitCXXThreadLocalInitFunc(); | |||
538 | if (ObjCRuntime) | |||
539 | if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) | |||
540 | AddGlobalCtor(ObjCInitFunction); | |||
541 | if (Context.getLangOpts().CUDA && CUDARuntime) { | |||
542 | if (llvm::Function *CudaCtorFunction = CUDARuntime->finalizeModule()) | |||
543 | AddGlobalCtor(CudaCtorFunction); | |||
544 | } | |||
545 | if (OpenMPRuntime) { | |||
546 | if (llvm::Function *OpenMPRequiresDirectiveRegFun = | |||
547 | OpenMPRuntime->emitRequiresDirectiveRegFun()) { | |||
548 | AddGlobalCtor(OpenMPRequiresDirectiveRegFun, 0); | |||
549 | } | |||
550 | OpenMPRuntime->createOffloadEntriesAndInfoMetadata(); | |||
551 | OpenMPRuntime->clear(); | |||
552 | } | |||
553 | if (PGOReader) { | |||
554 | getModule().setProfileSummary( | |||
555 | PGOReader->getSummary(/* UseCS */ false).getMD(VMContext), | |||
556 | llvm::ProfileSummary::PSK_Instr); | |||
557 | if (PGOStats.hasDiagnostics()) | |||
558 | PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName); | |||
559 | } | |||
560 | llvm::stable_sort(GlobalCtors, [](const Structor &L, const Structor &R) { | |||
561 | return L.LexOrder < R.LexOrder; | |||
562 | }); | |||
563 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); | |||
564 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); | |||
565 | EmitGlobalAnnotations(); | |||
566 | EmitStaticExternCAliases(); | |||
567 | checkAliases(); | |||
568 | EmitDeferredUnusedCoverageMappings(); | |||
569 | CodeGenPGO(*this).setValueProfilingFlag(getModule()); | |||
570 | if (CoverageMapping) | |||
571 | CoverageMapping->emit(); | |||
572 | if (CodeGenOpts.SanitizeCfiCrossDso) { | |||
573 | CodeGenFunction(*this).EmitCfiCheckFail(); | |||
574 | CodeGenFunction(*this).EmitCfiCheckStub(); | |||
575 | } | |||
576 | if (LangOpts.Sanitize.has(SanitizerKind::KCFI)) | |||
577 | finalizeKCFITypes(); | |||
578 | emitAtAvailableLinkGuard(); | |||
579 | if (Context.getTargetInfo().getTriple().isWasm()) | |||
580 | EmitMainVoidAlias(); | |||
581 | ||||
582 | if (getTriple().isAMDGPU()) { | |||
583 | // Emit reference of __amdgpu_device_library_preserve_asan_functions to | |||
584 | // preserve ASAN functions in bitcode libraries. | |||
585 | if (LangOpts.Sanitize.has(SanitizerKind::Address)) { | |||
586 | auto *FT = llvm::FunctionType::get(VoidTy, {}); | |||
587 | auto *F = llvm::Function::Create( | |||
588 | FT, llvm::GlobalValue::ExternalLinkage, | |||
589 | "__amdgpu_device_library_preserve_asan_functions", &getModule()); | |||
590 | auto *Var = new llvm::GlobalVariable( | |||
591 | getModule(), FT->getPointerTo(), | |||
592 | /*isConstant=*/true, llvm::GlobalValue::WeakAnyLinkage, F, | |||
593 | "__amdgpu_device_library_preserve_asan_functions_ptr", nullptr, | |||
594 | llvm::GlobalVariable::NotThreadLocal); | |||
595 | addCompilerUsedGlobal(Var); | |||
596 | } | |||
597 | // Emit amdgpu_code_object_version module flag, which is code object version | |||
598 | // times 100. | |||
599 | if (getTarget().getTargetOpts().CodeObjectVersion != | |||
600 | TargetOptions::COV_None) { | |||
601 | getModule().addModuleFlag(llvm::Module::Error, | |||
602 | "amdgpu_code_object_version", | |||
603 | getTarget().getTargetOpts().CodeObjectVersion); | |||
604 | } | |||
605 | } | |||
606 | ||||
607 | // Emit a global array containing all external kernels or device variables | |||
608 | // used by host functions and mark it as used for CUDA/HIP. This is necessary | |||
609 | // to get kernels or device variables in archives linked in even if these | |||
610 | // kernels or device variables are only used in host functions. | |||
611 | if (!Context.CUDAExternalDeviceDeclODRUsedByHost.empty()) { | |||
612 | SmallVector<llvm::Constant *, 8> UsedArray; | |||
613 | for (auto D : Context.CUDAExternalDeviceDeclODRUsedByHost) { | |||
614 | GlobalDecl GD; | |||
615 | if (auto *FD = dyn_cast<FunctionDecl>(D)) | |||
616 | GD = GlobalDecl(FD, KernelReferenceKind::Kernel); | |||
617 | else | |||
618 | GD = GlobalDecl(D); | |||
619 | UsedArray.push_back(llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
620 | GetAddrOfGlobal(GD), Int8PtrTy)); | |||
621 | } | |||
622 | ||||
623 | llvm::ArrayType *ATy = llvm::ArrayType::get(Int8PtrTy, UsedArray.size()); | |||
624 | ||||
625 | auto *GV = new llvm::GlobalVariable( | |||
626 | getModule(), ATy, false, llvm::GlobalValue::InternalLinkage, | |||
627 | llvm::ConstantArray::get(ATy, UsedArray), "__clang_gpu_used_external"); | |||
628 | addCompilerUsedGlobal(GV); | |||
629 | } | |||
630 | ||||
631 | emitLLVMUsed(); | |||
632 | if (SanStats) | |||
633 | SanStats->finish(); | |||
634 | ||||
635 | if (CodeGenOpts.Autolink && | |||
636 | (Context.getLangOpts().Modules || !LinkerOptionsMetadata.empty())) { | |||
637 | EmitModuleLinkOptions(); | |||
638 | } | |||
639 | ||||
640 | // On ELF we pass the dependent library specifiers directly to the linker | |||
641 | // without manipulating them. This is in contrast to other platforms where | |||
642 | // they are mapped to a specific linker option by the compiler. This | |||
643 | // difference is a result of the greater variety of ELF linkers and the fact | |||
644 | // that ELF linkers tend to handle libraries in a more complicated fashion | |||
645 | // than on other platforms. This forces us to defer handling the dependent | |||
646 | // libs to the linker. | |||
647 | // | |||
648 | // CUDA/HIP device and host libraries are different. Currently there is no | |||
649 | // way to differentiate dependent libraries for host or device. Existing | |||
650 | // usage of #pragma comment(lib, *) is intended for host libraries on | |||
651 | // Windows. Therefore emit llvm.dependent-libraries only for host. | |||
652 | if (!ELFDependentLibraries.empty() && !Context.getLangOpts().CUDAIsDevice) { | |||
653 | auto *NMD = getModule().getOrInsertNamedMetadata("llvm.dependent-libraries"); | |||
654 | for (auto *MD : ELFDependentLibraries) | |||
655 | NMD->addOperand(MD); | |||
656 | } | |||
657 | ||||
658 | // Record mregparm value now so it is visible through rest of codegen. | |||
659 | if (Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86) | |||
660 | getModule().addModuleFlag(llvm::Module::Error, "NumRegisterParameters", | |||
661 | CodeGenOpts.NumRegisterParameters); | |||
662 | ||||
663 | if (CodeGenOpts.DwarfVersion) { | |||
664 | getModule().addModuleFlag(llvm::Module::Max, "Dwarf Version", | |||
665 | CodeGenOpts.DwarfVersion); | |||
666 | } | |||
667 | ||||
668 | if (CodeGenOpts.Dwarf64) | |||
669 | getModule().addModuleFlag(llvm::Module::Max, "DWARF64", 1); | |||
670 | ||||
671 | if (Context.getLangOpts().SemanticInterposition) | |||
672 | // Require various optimization to respect semantic interposition. | |||
673 | getModule().setSemanticInterposition(true); | |||
674 | ||||
675 | if (CodeGenOpts.EmitCodeView) { | |||
676 | // Indicate that we want CodeView in the metadata. | |||
677 | getModule().addModuleFlag(llvm::Module::Warning, "CodeView", 1); | |||
678 | } | |||
679 | if (CodeGenOpts.CodeViewGHash) { | |||
680 | getModule().addModuleFlag(llvm::Module::Warning, "CodeViewGHash", 1); | |||
681 | } | |||
682 | if (CodeGenOpts.ControlFlowGuard) { | |||
683 | // Function ID tables and checks for Control Flow Guard (cfguard=2). | |||
684 | getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 2); | |||
685 | } else if (CodeGenOpts.ControlFlowGuardNoChecks) { | |||
686 | // Function ID tables for Control Flow Guard (cfguard=1). | |||
687 | getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 1); | |||
688 | } | |||
689 | if (CodeGenOpts.EHContGuard) { | |||
690 | // Function ID tables for EH Continuation Guard. | |||
691 | getModule().addModuleFlag(llvm::Module::Warning, "ehcontguard", 1); | |||
692 | } | |||
693 | if (Context.getLangOpts().Kernel) { | |||
694 | // Note if we are compiling with /kernel. | |||
695 | getModule().addModuleFlag(llvm::Module::Warning, "ms-kernel", 1); | |||
696 | } | |||
697 | if (CodeGenOpts.OptimizationLevel > 0 && CodeGenOpts.StrictVTablePointers) { | |||
698 | // We don't support LTO with 2 with different StrictVTablePointers | |||
699 | // FIXME: we could support it by stripping all the information introduced | |||
700 | // by StrictVTablePointers. | |||
701 | ||||
702 | getModule().addModuleFlag(llvm::Module::Error, "StrictVTablePointers",1); | |||
703 | ||||
704 | llvm::Metadata *Ops[2] = { | |||
705 | llvm::MDString::get(VMContext, "StrictVTablePointers"), | |||
706 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
707 | llvm::Type::getInt32Ty(VMContext), 1))}; | |||
708 | ||||
709 | getModule().addModuleFlag(llvm::Module::Require, | |||
710 | "StrictVTablePointersRequirement", | |||
711 | llvm::MDNode::get(VMContext, Ops)); | |||
712 | } | |||
713 | if (getModuleDebugInfo()) | |||
714 | // We support a single version in the linked module. The LLVM | |||
715 | // parser will drop debug info with a different version number | |||
716 | // (and warn about it, too). | |||
717 | getModule().addModuleFlag(llvm::Module::Warning, "Debug Info Version", | |||
718 | llvm::DEBUG_METADATA_VERSION); | |||
719 | ||||
720 | // We need to record the widths of enums and wchar_t, so that we can generate | |||
721 | // the correct build attributes in the ARM backend. wchar_size is also used by | |||
722 | // TargetLibraryInfo. | |||
723 | uint64_t WCharWidth = | |||
724 | Context.getTypeSizeInChars(Context.getWideCharType()).getQuantity(); | |||
725 | getModule().addModuleFlag(llvm::Module::Error, "wchar_size", WCharWidth); | |||
726 | ||||
727 | llvm::Triple::ArchType Arch = Context.getTargetInfo().getTriple().getArch(); | |||
728 | if ( Arch == llvm::Triple::arm | |||
729 | || Arch == llvm::Triple::armeb | |||
730 | || Arch == llvm::Triple::thumb | |||
731 | || Arch == llvm::Triple::thumbeb) { | |||
732 | // The minimum width of an enum in bytes | |||
733 | uint64_t EnumWidth = Context.getLangOpts().ShortEnums ? 1 : 4; | |||
734 | getModule().addModuleFlag(llvm::Module::Error, "min_enum_size", EnumWidth); | |||
735 | } | |||
736 | ||||
737 | if (Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64) { | |||
738 | StringRef ABIStr = Target.getABI(); | |||
739 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
740 | getModule().addModuleFlag(llvm::Module::Error, "target-abi", | |||
741 | llvm::MDString::get(Ctx, ABIStr)); | |||
742 | } | |||
743 | ||||
744 | if (CodeGenOpts.SanitizeCfiCrossDso) { | |||
745 | // Indicate that we want cross-DSO control flow integrity checks. | |||
746 | getModule().addModuleFlag(llvm::Module::Override, "Cross-DSO CFI", 1); | |||
747 | } | |||
748 | ||||
749 | if (CodeGenOpts.WholeProgramVTables) { | |||
750 | // Indicate whether VFE was enabled for this module, so that the | |||
751 | // vcall_visibility metadata added under whole program vtables is handled | |||
752 | // appropriately in the optimizer. | |||
753 | getModule().addModuleFlag(llvm::Module::Error, "Virtual Function Elim", | |||
754 | CodeGenOpts.VirtualFunctionElimination); | |||
755 | } | |||
756 | ||||
757 | if (LangOpts.Sanitize.has(SanitizerKind::CFIICall)) { | |||
758 | getModule().addModuleFlag(llvm::Module::Override, | |||
759 | "CFI Canonical Jump Tables", | |||
760 | CodeGenOpts.SanitizeCfiCanonicalJumpTables); | |||
761 | } | |||
762 | ||||
763 | if (LangOpts.Sanitize.has(SanitizerKind::KCFI)) { | |||
764 | getModule().addModuleFlag(llvm::Module::Override, "kcfi", 1); | |||
765 | // KCFI assumes patchable-function-prefix is the same for all indirectly | |||
766 | // called functions. Store the expected offset for code generation. | |||
767 | if (CodeGenOpts.PatchableFunctionEntryOffset) | |||
768 | getModule().addModuleFlag(llvm::Module::Override, "kcfi-offset", | |||
769 | CodeGenOpts.PatchableFunctionEntryOffset); | |||
770 | } | |||
771 | ||||
772 | if (CodeGenOpts.CFProtectionReturn && | |||
773 | Target.checkCFProtectionReturnSupported(getDiags())) { | |||
774 | // Indicate that we want to instrument return control flow protection. | |||
775 | getModule().addModuleFlag(llvm::Module::Min, "cf-protection-return", | |||
776 | 1); | |||
777 | } | |||
778 | ||||
779 | if (CodeGenOpts.CFProtectionBranch && | |||
780 | Target.checkCFProtectionBranchSupported(getDiags())) { | |||
781 | // Indicate that we want to instrument branch control flow protection. | |||
782 | getModule().addModuleFlag(llvm::Module::Min, "cf-protection-branch", | |||
783 | 1); | |||
784 | } | |||
785 | ||||
786 | if (CodeGenOpts.FunctionReturnThunks) | |||
787 | getModule().addModuleFlag(llvm::Module::Override, "function_return_thunk_extern", 1); | |||
788 | ||||
789 | if (CodeGenOpts.IndirectBranchCSPrefix) | |||
790 | getModule().addModuleFlag(llvm::Module::Override, "indirect_branch_cs_prefix", 1); | |||
791 | ||||
792 | // Add module metadata for return address signing (ignoring | |||
793 | // non-leaf/all) and stack tagging. These are actually turned on by function | |||
794 | // attributes, but we use module metadata to emit build attributes. This is | |||
795 | // needed for LTO, where the function attributes are inside bitcode | |||
796 | // serialised into a global variable by the time build attributes are | |||
797 | // emitted, so we can't access them. LTO objects could be compiled with | |||
798 | // different flags therefore module flags are set to "Min" behavior to achieve | |||
799 | // the same end result of the normal build where e.g BTI is off if any object | |||
800 | // doesn't support it. | |||
801 | if (Context.getTargetInfo().hasFeature("ptrauth") && | |||
802 | LangOpts.getSignReturnAddressScope() != | |||
803 | LangOptions::SignReturnAddressScopeKind::None) | |||
804 | getModule().addModuleFlag(llvm::Module::Override, | |||
805 | "sign-return-address-buildattr", 1); | |||
806 | if (LangOpts.Sanitize.has(SanitizerKind::MemtagStack)) | |||
807 | getModule().addModuleFlag(llvm::Module::Override, | |||
808 | "tag-stack-memory-buildattr", 1); | |||
809 | ||||
810 | if (Arch == llvm::Triple::thumb || Arch == llvm::Triple::thumbeb || | |||
811 | Arch == llvm::Triple::arm || Arch == llvm::Triple::armeb || | |||
812 | Arch == llvm::Triple::aarch64 || Arch == llvm::Triple::aarch64_32 || | |||
813 | Arch == llvm::Triple::aarch64_be) { | |||
814 | if (LangOpts.BranchTargetEnforcement) | |||
815 | getModule().addModuleFlag(llvm::Module::Min, "branch-target-enforcement", | |||
816 | 1); | |||
817 | if (LangOpts.hasSignReturnAddress()) | |||
818 | getModule().addModuleFlag(llvm::Module::Min, "sign-return-address", 1); | |||
819 | if (LangOpts.isSignReturnAddressScopeAll()) | |||
820 | getModule().addModuleFlag(llvm::Module::Min, "sign-return-address-all", | |||
821 | 1); | |||
822 | if (!LangOpts.isSignReturnAddressWithAKey()) | |||
823 | getModule().addModuleFlag(llvm::Module::Min, | |||
824 | "sign-return-address-with-bkey", 1); | |||
825 | } | |||
826 | ||||
827 | if (!CodeGenOpts.MemoryProfileOutput.empty()) { | |||
828 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
829 | getModule().addModuleFlag( | |||
830 | llvm::Module::Error, "MemProfProfileFilename", | |||
831 | llvm::MDString::get(Ctx, CodeGenOpts.MemoryProfileOutput)); | |||
832 | } | |||
833 | ||||
834 | if (LangOpts.CUDAIsDevice && getTriple().isNVPTX()) { | |||
835 | // Indicate whether __nvvm_reflect should be configured to flush denormal | |||
836 | // floating point values to 0. (This corresponds to its "__CUDA_FTZ" | |||
837 | // property.) | |||
838 | getModule().addModuleFlag(llvm::Module::Override, "nvvm-reflect-ftz", | |||
839 | CodeGenOpts.FP32DenormalMode.Output != | |||
840 | llvm::DenormalMode::IEEE); | |||
841 | } | |||
842 | ||||
843 | if (LangOpts.EHAsynch) | |||
844 | getModule().addModuleFlag(llvm::Module::Warning, "eh-asynch", 1); | |||
845 | ||||
846 | // Indicate whether this Module was compiled with -fopenmp | |||
847 | if (getLangOpts().OpenMP && !getLangOpts().OpenMPSimd) | |||
848 | getModule().addModuleFlag(llvm::Module::Max, "openmp", LangOpts.OpenMP); | |||
849 | if (getLangOpts().OpenMPIsDevice) | |||
850 | getModule().addModuleFlag(llvm::Module::Max, "openmp-device", | |||
851 | LangOpts.OpenMP); | |||
852 | ||||
853 | // Emit OpenCL specific module metadata: OpenCL/SPIR version. | |||
854 | if (LangOpts.OpenCL || (LangOpts.CUDAIsDevice && getTriple().isSPIRV())) { | |||
855 | EmitOpenCLMetadata(); | |||
856 | // Emit SPIR version. | |||
857 | if (getTriple().isSPIR()) { | |||
858 | // SPIR v2.0 s2.12 - The SPIR version used by the module is stored in the | |||
859 | // opencl.spir.version named metadata. | |||
860 | // C++ for OpenCL has a distinct mapping for version compatibility with | |||
861 | // OpenCL. | |||
862 | auto Version = LangOpts.getOpenCLCompatibleVersion(); | |||
863 | llvm::Metadata *SPIRVerElts[] = { | |||
864 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
865 | Int32Ty, Version / 100)), | |||
866 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
867 | Int32Ty, (Version / 100 > 1) ? 0 : 2))}; | |||
868 | llvm::NamedMDNode *SPIRVerMD = | |||
869 | TheModule.getOrInsertNamedMetadata("opencl.spir.version"); | |||
870 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
871 | SPIRVerMD->addOperand(llvm::MDNode::get(Ctx, SPIRVerElts)); | |||
872 | } | |||
873 | } | |||
874 | ||||
875 | // HLSL related end of code gen work items. | |||
876 | if (LangOpts.HLSL) | |||
877 | getHLSLRuntime().finishCodeGen(); | |||
878 | ||||
879 | if (uint32_t PLevel = Context.getLangOpts().PICLevel) { | |||
880 | assert(PLevel < 3 && "Invalid PIC Level")(static_cast <bool> (PLevel < 3 && "Invalid PIC Level" ) ? void (0) : __assert_fail ("PLevel < 3 && \"Invalid PIC Level\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 880, __extension__ __PRETTY_FUNCTION__ )); | |||
881 | getModule().setPICLevel(static_cast<llvm::PICLevel::Level>(PLevel)); | |||
882 | if (Context.getLangOpts().PIE) | |||
883 | getModule().setPIELevel(static_cast<llvm::PIELevel::Level>(PLevel)); | |||
884 | } | |||
885 | ||||
886 | if (getCodeGenOpts().CodeModel.size() > 0) { | |||
887 | unsigned CM = llvm::StringSwitch<unsigned>(getCodeGenOpts().CodeModel) | |||
888 | .Case("tiny", llvm::CodeModel::Tiny) | |||
889 | .Case("small", llvm::CodeModel::Small) | |||
890 | .Case("kernel", llvm::CodeModel::Kernel) | |||
891 | .Case("medium", llvm::CodeModel::Medium) | |||
892 | .Case("large", llvm::CodeModel::Large) | |||
893 | .Default(~0u); | |||
894 | if (CM != ~0u) { | |||
895 | llvm::CodeModel::Model codeModel = static_cast<llvm::CodeModel::Model>(CM); | |||
896 | getModule().setCodeModel(codeModel); | |||
897 | } | |||
898 | } | |||
899 | ||||
900 | if (CodeGenOpts.NoPLT) | |||
901 | getModule().setRtLibUseGOT(); | |||
902 | if (CodeGenOpts.UnwindTables) | |||
903 | getModule().setUwtable(llvm::UWTableKind(CodeGenOpts.UnwindTables)); | |||
904 | ||||
905 | switch (CodeGenOpts.getFramePointer()) { | |||
906 | case CodeGenOptions::FramePointerKind::None: | |||
907 | // 0 ("none") is the default. | |||
908 | break; | |||
909 | case CodeGenOptions::FramePointerKind::NonLeaf: | |||
910 | getModule().setFramePointer(llvm::FramePointerKind::NonLeaf); | |||
911 | break; | |||
912 | case CodeGenOptions::FramePointerKind::All: | |||
913 | getModule().setFramePointer(llvm::FramePointerKind::All); | |||
914 | break; | |||
915 | } | |||
916 | ||||
917 | SimplifyPersonality(); | |||
918 | ||||
919 | if (getCodeGenOpts().EmitDeclMetadata) | |||
920 | EmitDeclMetadata(); | |||
921 | ||||
922 | if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) | |||
923 | EmitCoverageFile(); | |||
924 | ||||
925 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
926 | DI->finalize(); | |||
927 | ||||
928 | if (getCodeGenOpts().EmitVersionIdentMetadata) | |||
929 | EmitVersionIdentMetadata(); | |||
930 | ||||
931 | if (!getCodeGenOpts().RecordCommandLine.empty()) | |||
932 | EmitCommandLineMetadata(); | |||
933 | ||||
934 | if (!getCodeGenOpts().StackProtectorGuard.empty()) | |||
935 | getModule().setStackProtectorGuard(getCodeGenOpts().StackProtectorGuard); | |||
936 | if (!getCodeGenOpts().StackProtectorGuardReg.empty()) | |||
937 | getModule().setStackProtectorGuardReg( | |||
938 | getCodeGenOpts().StackProtectorGuardReg); | |||
939 | if (!getCodeGenOpts().StackProtectorGuardSymbol.empty()) | |||
940 | getModule().setStackProtectorGuardSymbol( | |||
941 | getCodeGenOpts().StackProtectorGuardSymbol); | |||
942 | if (getCodeGenOpts().StackProtectorGuardOffset != INT_MAX2147483647) | |||
943 | getModule().setStackProtectorGuardOffset( | |||
944 | getCodeGenOpts().StackProtectorGuardOffset); | |||
945 | if (getCodeGenOpts().StackAlignment) | |||
946 | getModule().setOverrideStackAlignment(getCodeGenOpts().StackAlignment); | |||
947 | if (getCodeGenOpts().SkipRaxSetup) | |||
948 | getModule().addModuleFlag(llvm::Module::Override, "SkipRaxSetup", 1); | |||
949 | ||||
950 | getTargetCodeGenInfo().emitTargetMetadata(*this, MangledDeclNames); | |||
951 | ||||
952 | EmitBackendOptionsMetadata(getCodeGenOpts()); | |||
953 | ||||
954 | // If there is device offloading code embed it in the host now. | |||
955 | EmbedObject(&getModule(), CodeGenOpts, getDiags()); | |||
956 | ||||
957 | // Set visibility from DLL storage class | |||
958 | // We do this at the end of LLVM IR generation; after any operation | |||
959 | // that might affect the DLL storage class or the visibility, and | |||
960 | // before anything that might act on these. | |||
961 | setVisibilityFromDLLStorageClass(LangOpts, getModule()); | |||
962 | } | |||
963 | ||||
964 | void CodeGenModule::EmitOpenCLMetadata() { | |||
965 | // SPIR v2.0 s2.13 - The OpenCL version used by the module is stored in the | |||
966 | // opencl.ocl.version named metadata node. | |||
967 | // C++ for OpenCL has a distinct mapping for versions compatibile with OpenCL. | |||
968 | auto Version = LangOpts.getOpenCLCompatibleVersion(); | |||
969 | llvm::Metadata *OCLVerElts[] = { | |||
970 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
971 | Int32Ty, Version / 100)), | |||
972 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
973 | Int32Ty, (Version % 100) / 10))}; | |||
974 | llvm::NamedMDNode *OCLVerMD = | |||
975 | TheModule.getOrInsertNamedMetadata("opencl.ocl.version"); | |||
976 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
977 | OCLVerMD->addOperand(llvm::MDNode::get(Ctx, OCLVerElts)); | |||
978 | } | |||
979 | ||||
980 | void CodeGenModule::EmitBackendOptionsMetadata( | |||
981 | const CodeGenOptions CodeGenOpts) { | |||
982 | if (getTriple().isRISCV()) { | |||
983 | getModule().addModuleFlag(llvm::Module::Error, "SmallDataLimit", | |||
984 | CodeGenOpts.SmallDataLimit); | |||
985 | } | |||
986 | } | |||
987 | ||||
988 | void CodeGenModule::UpdateCompletedType(const TagDecl *TD) { | |||
989 | // Make sure that this type is translated. | |||
990 | Types.UpdateCompletedType(TD); | |||
991 | } | |||
992 | ||||
993 | void CodeGenModule::RefreshTypeCacheForClass(const CXXRecordDecl *RD) { | |||
994 | // Make sure that this type is translated. | |||
995 | Types.RefreshTypeCacheForClass(RD); | |||
996 | } | |||
997 | ||||
998 | llvm::MDNode *CodeGenModule::getTBAATypeInfo(QualType QTy) { | |||
999 | if (!TBAA) | |||
1000 | return nullptr; | |||
1001 | return TBAA->getTypeInfo(QTy); | |||
1002 | } | |||
1003 | ||||
1004 | TBAAAccessInfo CodeGenModule::getTBAAAccessInfo(QualType AccessType) { | |||
1005 | if (!TBAA) | |||
1006 | return TBAAAccessInfo(); | |||
1007 | if (getLangOpts().CUDAIsDevice) { | |||
1008 | // As CUDA builtin surface/texture types are replaced, skip generating TBAA | |||
1009 | // access info. | |||
1010 | if (AccessType->isCUDADeviceBuiltinSurfaceType()) { | |||
1011 | if (getTargetCodeGenInfo().getCUDADeviceBuiltinSurfaceDeviceType() != | |||
1012 | nullptr) | |||
1013 | return TBAAAccessInfo(); | |||
1014 | } else if (AccessType->isCUDADeviceBuiltinTextureType()) { | |||
1015 | if (getTargetCodeGenInfo().getCUDADeviceBuiltinTextureDeviceType() != | |||
1016 | nullptr) | |||
1017 | return TBAAAccessInfo(); | |||
1018 | } | |||
1019 | } | |||
1020 | return TBAA->getAccessInfo(AccessType); | |||
1021 | } | |||
1022 | ||||
1023 | TBAAAccessInfo | |||
1024 | CodeGenModule::getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType) { | |||
1025 | if (!TBAA) | |||
1026 | return TBAAAccessInfo(); | |||
1027 | return TBAA->getVTablePtrAccessInfo(VTablePtrType); | |||
1028 | } | |||
1029 | ||||
1030 | llvm::MDNode *CodeGenModule::getTBAAStructInfo(QualType QTy) { | |||
1031 | if (!TBAA) | |||
1032 | return nullptr; | |||
1033 | return TBAA->getTBAAStructInfo(QTy); | |||
1034 | } | |||
1035 | ||||
1036 | llvm::MDNode *CodeGenModule::getTBAABaseTypeInfo(QualType QTy) { | |||
1037 | if (!TBAA) | |||
1038 | return nullptr; | |||
1039 | return TBAA->getBaseTypeInfo(QTy); | |||
1040 | } | |||
1041 | ||||
1042 | llvm::MDNode *CodeGenModule::getTBAAAccessTagInfo(TBAAAccessInfo Info) { | |||
1043 | if (!TBAA) | |||
1044 | return nullptr; | |||
1045 | return TBAA->getAccessTagInfo(Info); | |||
1046 | } | |||
1047 | ||||
1048 | TBAAAccessInfo CodeGenModule::mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo, | |||
1049 | TBAAAccessInfo TargetInfo) { | |||
1050 | if (!TBAA) | |||
1051 | return TBAAAccessInfo(); | |||
1052 | return TBAA->mergeTBAAInfoForCast(SourceInfo, TargetInfo); | |||
1053 | } | |||
1054 | ||||
1055 | TBAAAccessInfo | |||
1056 | CodeGenModule::mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA, | |||
1057 | TBAAAccessInfo InfoB) { | |||
1058 | if (!TBAA) | |||
1059 | return TBAAAccessInfo(); | |||
1060 | return TBAA->mergeTBAAInfoForConditionalOperator(InfoA, InfoB); | |||
1061 | } | |||
1062 | ||||
1063 | TBAAAccessInfo | |||
1064 | CodeGenModule::mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo, | |||
1065 | TBAAAccessInfo SrcInfo) { | |||
1066 | if (!TBAA) | |||
1067 | return TBAAAccessInfo(); | |||
1068 | return TBAA->mergeTBAAInfoForConditionalOperator(DestInfo, SrcInfo); | |||
1069 | } | |||
1070 | ||||
1071 | void CodeGenModule::DecorateInstructionWithTBAA(llvm::Instruction *Inst, | |||
1072 | TBAAAccessInfo TBAAInfo) { | |||
1073 | if (llvm::MDNode *Tag = getTBAAAccessTagInfo(TBAAInfo)) | |||
1074 | Inst->setMetadata(llvm::LLVMContext::MD_tbaa, Tag); | |||
1075 | } | |||
1076 | ||||
1077 | void CodeGenModule::DecorateInstructionWithInvariantGroup( | |||
1078 | llvm::Instruction *I, const CXXRecordDecl *RD) { | |||
1079 | I->setMetadata(llvm::LLVMContext::MD_invariant_group, | |||
1080 | llvm::MDNode::get(getLLVMContext(), {})); | |||
1081 | } | |||
1082 | ||||
1083 | void CodeGenModule::Error(SourceLocation loc, StringRef message) { | |||
1084 | unsigned diagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, "%0"); | |||
1085 | getDiags().Report(Context.getFullLoc(loc), diagID) << message; | |||
1086 | } | |||
1087 | ||||
1088 | /// ErrorUnsupported - Print out an error that codegen doesn't support the | |||
1089 | /// specified stmt yet. | |||
1090 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type) { | |||
1091 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, | |||
1092 | "cannot compile this %0 yet"); | |||
1093 | std::string Msg = Type; | |||
1094 | getDiags().Report(Context.getFullLoc(S->getBeginLoc()), DiagID) | |||
1095 | << Msg << S->getSourceRange(); | |||
1096 | } | |||
1097 | ||||
1098 | /// ErrorUnsupported - Print out an error that codegen doesn't support the | |||
1099 | /// specified decl yet. | |||
1100 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type) { | |||
1101 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, | |||
1102 | "cannot compile this %0 yet"); | |||
1103 | std::string Msg = Type; | |||
1104 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; | |||
1105 | } | |||
1106 | ||||
1107 | llvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { | |||
1108 | return llvm::ConstantInt::get(SizeTy, size.getQuantity()); | |||
1109 | } | |||
1110 | ||||
1111 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, | |||
1112 | const NamedDecl *D) const { | |||
1113 | // Internal definitions always have default visibility. | |||
1114 | if (GV->hasLocalLinkage()) { | |||
1115 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); | |||
1116 | return; | |||
1117 | } | |||
1118 | if (!D) | |||
1119 | return; | |||
1120 | // Set visibility for definitions, and for declarations if requested globally | |||
1121 | // or set explicitly. | |||
1122 | LinkageInfo LV = D->getLinkageAndVisibility(); | |||
1123 | if (GV->hasDLLExportStorageClass() || GV->hasDLLImportStorageClass()) { | |||
1124 | // Reject incompatible dlllstorage and visibility annotations. | |||
1125 | if (!LV.isVisibilityExplicit()) | |||
1126 | return; | |||
1127 | if (GV->hasDLLExportStorageClass()) { | |||
1128 | if (LV.getVisibility() == HiddenVisibility) | |||
1129 | getDiags().Report(D->getLocation(), | |||
1130 | diag::err_hidden_visibility_dllexport); | |||
1131 | } else if (LV.getVisibility() != DefaultVisibility) { | |||
1132 | getDiags().Report(D->getLocation(), | |||
1133 | diag::err_non_default_visibility_dllimport); | |||
1134 | } | |||
1135 | return; | |||
1136 | } | |||
1137 | ||||
1138 | if (LV.isVisibilityExplicit() || getLangOpts().SetVisibilityForExternDecls || | |||
1139 | !GV->isDeclarationForLinker()) | |||
1140 | GV->setVisibility(GetLLVMVisibility(LV.getVisibility())); | |||
1141 | } | |||
1142 | ||||
1143 | static bool shouldAssumeDSOLocal(const CodeGenModule &CGM, | |||
1144 | llvm::GlobalValue *GV) { | |||
1145 | if (GV->hasLocalLinkage()) | |||
1146 | return true; | |||
1147 | ||||
1148 | if (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()) | |||
1149 | return true; | |||
1150 | ||||
1151 | // DLLImport explicitly marks the GV as external. | |||
1152 | if (GV->hasDLLImportStorageClass()) | |||
1153 | return false; | |||
1154 | ||||
1155 | const llvm::Triple &TT = CGM.getTriple(); | |||
1156 | if (TT.isWindowsGNUEnvironment()) { | |||
1157 | // In MinGW, variables without DLLImport can still be automatically | |||
1158 | // imported from a DLL by the linker; don't mark variables that | |||
1159 | // potentially could come from another DLL as DSO local. | |||
1160 | ||||
1161 | // With EmulatedTLS, TLS variables can be autoimported from other DLLs | |||
1162 | // (and this actually happens in the public interface of libstdc++), so | |||
1163 | // such variables can't be marked as DSO local. (Native TLS variables | |||
1164 | // can't be dllimported at all, though.) | |||
1165 | if (GV->isDeclarationForLinker() && isa<llvm::GlobalVariable>(GV) && | |||
1166 | (!GV->isThreadLocal() || CGM.getCodeGenOpts().EmulatedTLS)) | |||
1167 | return false; | |||
1168 | } | |||
1169 | ||||
1170 | // On COFF, don't mark 'extern_weak' symbols as DSO local. If these symbols | |||
1171 | // remain unresolved in the link, they can be resolved to zero, which is | |||
1172 | // outside the current DSO. | |||
1173 | if (TT.isOSBinFormatCOFF() && GV->hasExternalWeakLinkage()) | |||
1174 | return false; | |||
1175 | ||||
1176 | // Every other GV is local on COFF. | |||
1177 | // Make an exception for windows OS in the triple: Some firmware builds use | |||
1178 | // *-win32-macho triples. This (accidentally?) produced windows relocations | |||
1179 | // without GOT tables in older clang versions; Keep this behaviour. | |||
1180 | // FIXME: even thread local variables? | |||
1181 | if (TT.isOSBinFormatCOFF() || (TT.isOSWindows() && TT.isOSBinFormatMachO())) | |||
1182 | return true; | |||
1183 | ||||
1184 | // Only handle COFF and ELF for now. | |||
1185 | if (!TT.isOSBinFormatELF()) | |||
1186 | return false; | |||
1187 | ||||
1188 | // If this is not an executable, don't assume anything is local. | |||
1189 | const auto &CGOpts = CGM.getCodeGenOpts(); | |||
1190 | llvm::Reloc::Model RM = CGOpts.RelocationModel; | |||
1191 | const auto &LOpts = CGM.getLangOpts(); | |||
1192 | if (RM != llvm::Reloc::Static && !LOpts.PIE) { | |||
1193 | // On ELF, if -fno-semantic-interposition is specified and the target | |||
1194 | // supports local aliases, there will be neither CC1 | |||
1195 | // -fsemantic-interposition nor -fhalf-no-semantic-interposition. Set | |||
1196 | // dso_local on the function if using a local alias is preferable (can avoid | |||
1197 | // PLT indirection). | |||
1198 | if (!(isa<llvm::Function>(GV) && GV->canBenefitFromLocalAlias())) | |||
1199 | return false; | |||
1200 | return !(CGM.getLangOpts().SemanticInterposition || | |||
1201 | CGM.getLangOpts().HalfNoSemanticInterposition); | |||
1202 | } | |||
1203 | ||||
1204 | // A definition cannot be preempted from an executable. | |||
1205 | if (!GV->isDeclarationForLinker()) | |||
1206 | return true; | |||
1207 | ||||
1208 | // Most PIC code sequences that assume that a symbol is local cannot produce a | |||
1209 | // 0 if it turns out the symbol is undefined. While this is ABI and relocation | |||
1210 | // depended, it seems worth it to handle it here. | |||
1211 | if (RM == llvm::Reloc::PIC_ && GV->hasExternalWeakLinkage()) | |||
1212 | return false; | |||
1213 | ||||
1214 | // PowerPC64 prefers TOC indirection to avoid copy relocations. | |||
1215 | if (TT.isPPC64()) | |||
1216 | return false; | |||
1217 | ||||
1218 | if (CGOpts.DirectAccessExternalData) { | |||
1219 | // If -fdirect-access-external-data (default for -fno-pic), set dso_local | |||
1220 | // for non-thread-local variables. If the symbol is not defined in the | |||
1221 | // executable, a copy relocation will be needed at link time. dso_local is | |||
1222 | // excluded for thread-local variables because they generally don't support | |||
1223 | // copy relocations. | |||
1224 | if (auto *Var = dyn_cast<llvm::GlobalVariable>(GV)) | |||
1225 | if (!Var->isThreadLocal()) | |||
1226 | return true; | |||
1227 | ||||
1228 | // -fno-pic sets dso_local on a function declaration to allow direct | |||
1229 | // accesses when taking its address (similar to a data symbol). If the | |||
1230 | // function is not defined in the executable, a canonical PLT entry will be | |||
1231 | // needed at link time. -fno-direct-access-external-data can avoid the | |||
1232 | // canonical PLT entry. We don't generalize this condition to -fpie/-fpic as | |||
1233 | // it could just cause trouble without providing perceptible benefits. | |||
1234 | if (isa<llvm::Function>(GV) && !CGOpts.NoPLT && RM == llvm::Reloc::Static) | |||
1235 | return true; | |||
1236 | } | |||
1237 | ||||
1238 | // If we can use copy relocations we can assume it is local. | |||
1239 | ||||
1240 | // Otherwise don't assume it is local. | |||
1241 | return false; | |||
1242 | } | |||
1243 | ||||
1244 | void CodeGenModule::setDSOLocal(llvm::GlobalValue *GV) const { | |||
1245 | GV->setDSOLocal(shouldAssumeDSOLocal(*this, GV)); | |||
1246 | } | |||
1247 | ||||
1248 | void CodeGenModule::setDLLImportDLLExport(llvm::GlobalValue *GV, | |||
1249 | GlobalDecl GD) const { | |||
1250 | const auto *D = dyn_cast<NamedDecl>(GD.getDecl()); | |||
1251 | // C++ destructors have a few C++ ABI specific special cases. | |||
1252 | if (const auto *Dtor = dyn_cast_or_null<CXXDestructorDecl>(D)) { | |||
1253 | getCXXABI().setCXXDestructorDLLStorage(GV, Dtor, GD.getDtorType()); | |||
1254 | return; | |||
1255 | } | |||
1256 | setDLLImportDLLExport(GV, D); | |||
1257 | } | |||
1258 | ||||
1259 | void CodeGenModule::setDLLImportDLLExport(llvm::GlobalValue *GV, | |||
1260 | const NamedDecl *D) const { | |||
1261 | if (D && D->isExternallyVisible()) { | |||
1262 | if (D->hasAttr<DLLImportAttr>()) | |||
1263 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLImportStorageClass); | |||
1264 | else if ((D->hasAttr<DLLExportAttr>() || | |||
1265 | shouldMapVisibilityToDLLExport(D)) && | |||
1266 | !GV->isDeclarationForLinker()) | |||
1267 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLExportStorageClass); | |||
1268 | } | |||
1269 | } | |||
1270 | ||||
1271 | void CodeGenModule::setGVProperties(llvm::GlobalValue *GV, | |||
1272 | GlobalDecl GD) const { | |||
1273 | setDLLImportDLLExport(GV, GD); | |||
1274 | setGVPropertiesAux(GV, dyn_cast<NamedDecl>(GD.getDecl())); | |||
1275 | } | |||
1276 | ||||
1277 | void CodeGenModule::setGVProperties(llvm::GlobalValue *GV, | |||
1278 | const NamedDecl *D) const { | |||
1279 | setDLLImportDLLExport(GV, D); | |||
1280 | setGVPropertiesAux(GV, D); | |||
1281 | } | |||
1282 | ||||
1283 | void CodeGenModule::setGVPropertiesAux(llvm::GlobalValue *GV, | |||
1284 | const NamedDecl *D) const { | |||
1285 | setGlobalVisibility(GV, D); | |||
1286 | setDSOLocal(GV); | |||
1287 | GV->setPartition(CodeGenOpts.SymbolPartition); | |||
1288 | } | |||
1289 | ||||
1290 | static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel(StringRef S) { | |||
1291 | return llvm::StringSwitch<llvm::GlobalVariable::ThreadLocalMode>(S) | |||
1292 | .Case("global-dynamic", llvm::GlobalVariable::GeneralDynamicTLSModel) | |||
1293 | .Case("local-dynamic", llvm::GlobalVariable::LocalDynamicTLSModel) | |||
1294 | .Case("initial-exec", llvm::GlobalVariable::InitialExecTLSModel) | |||
1295 | .Case("local-exec", llvm::GlobalVariable::LocalExecTLSModel); | |||
1296 | } | |||
1297 | ||||
1298 | llvm::GlobalVariable::ThreadLocalMode | |||
1299 | CodeGenModule::GetDefaultLLVMTLSModel() const { | |||
1300 | switch (CodeGenOpts.getDefaultTLSModel()) { | |||
1301 | case CodeGenOptions::GeneralDynamicTLSModel: | |||
1302 | return llvm::GlobalVariable::GeneralDynamicTLSModel; | |||
1303 | case CodeGenOptions::LocalDynamicTLSModel: | |||
1304 | return llvm::GlobalVariable::LocalDynamicTLSModel; | |||
1305 | case CodeGenOptions::InitialExecTLSModel: | |||
1306 | return llvm::GlobalVariable::InitialExecTLSModel; | |||
1307 | case CodeGenOptions::LocalExecTLSModel: | |||
1308 | return llvm::GlobalVariable::LocalExecTLSModel; | |||
1309 | } | |||
1310 | llvm_unreachable("Invalid TLS model!")::llvm::llvm_unreachable_internal("Invalid TLS model!", "clang/lib/CodeGen/CodeGenModule.cpp" , 1310); | |||
1311 | } | |||
1312 | ||||
1313 | void CodeGenModule::setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const { | |||
1314 | assert(D.getTLSKind() && "setting TLS mode on non-TLS var!")(static_cast <bool> (D.getTLSKind() && "setting TLS mode on non-TLS var!" ) ? void (0) : __assert_fail ("D.getTLSKind() && \"setting TLS mode on non-TLS var!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1314, __extension__ __PRETTY_FUNCTION__ )); | |||
1315 | ||||
1316 | llvm::GlobalValue::ThreadLocalMode TLM; | |||
1317 | TLM = GetDefaultLLVMTLSModel(); | |||
1318 | ||||
1319 | // Override the TLS model if it is explicitly specified. | |||
1320 | if (const TLSModelAttr *Attr = D.getAttr<TLSModelAttr>()) { | |||
1321 | TLM = GetLLVMTLSModel(Attr->getModel()); | |||
1322 | } | |||
1323 | ||||
1324 | GV->setThreadLocalMode(TLM); | |||
1325 | } | |||
1326 | ||||
1327 | static std::string getCPUSpecificMangling(const CodeGenModule &CGM, | |||
1328 | StringRef Name) { | |||
1329 | const TargetInfo &Target = CGM.getTarget(); | |||
1330 | return (Twine('.') + Twine(Target.CPUSpecificManglingCharacter(Name))).str(); | |||
1331 | } | |||
1332 | ||||
1333 | static void AppendCPUSpecificCPUDispatchMangling(const CodeGenModule &CGM, | |||
1334 | const CPUSpecificAttr *Attr, | |||
1335 | unsigned CPUIndex, | |||
1336 | raw_ostream &Out) { | |||
1337 | // cpu_specific gets the current name, dispatch gets the resolver if IFunc is | |||
1338 | // supported. | |||
1339 | if (Attr) | |||
1340 | Out << getCPUSpecificMangling(CGM, Attr->getCPUName(CPUIndex)->getName()); | |||
1341 | else if (CGM.getTarget().supportsIFunc()) | |||
1342 | Out << ".resolver"; | |||
1343 | } | |||
1344 | ||||
1345 | static void AppendTargetVersionMangling(const CodeGenModule &CGM, | |||
1346 | const TargetVersionAttr *Attr, | |||
1347 | raw_ostream &Out) { | |||
1348 | if (Attr->isDefaultVersion()) | |||
1349 | return; | |||
1350 | Out << "._"; | |||
1351 | llvm::SmallVector<StringRef, 8> Feats; | |||
1352 | Attr->getFeatures(Feats); | |||
1353 | for (const auto &Feat : Feats) { | |||
1354 | Out << 'M'; | |||
1355 | Out << Feat; | |||
1356 | } | |||
1357 | } | |||
1358 | ||||
1359 | static void AppendTargetMangling(const CodeGenModule &CGM, | |||
1360 | const TargetAttr *Attr, raw_ostream &Out) { | |||
1361 | if (Attr->isDefaultVersion()) | |||
1362 | return; | |||
1363 | ||||
1364 | Out << '.'; | |||
1365 | const TargetInfo &Target = CGM.getTarget(); | |||
1366 | ParsedTargetAttr Info = Target.parseTargetAttr(Attr->getFeaturesStr()); | |||
1367 | llvm::sort(Info.Features, [&Target](StringRef LHS, StringRef RHS) { | |||
1368 | // Multiversioning doesn't allow "no-${feature}", so we can | |||
1369 | // only have "+" prefixes here. | |||
1370 | assert(LHS.startswith("+") && RHS.startswith("+") &&(static_cast <bool> (LHS.startswith("+") && RHS .startswith("+") && "Features should always have a prefix." ) ? void (0) : __assert_fail ("LHS.startswith(\"+\") && RHS.startswith(\"+\") && \"Features should always have a prefix.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1371, __extension__ __PRETTY_FUNCTION__ )) | |||
1371 | "Features should always have a prefix.")(static_cast <bool> (LHS.startswith("+") && RHS .startswith("+") && "Features should always have a prefix." ) ? void (0) : __assert_fail ("LHS.startswith(\"+\") && RHS.startswith(\"+\") && \"Features should always have a prefix.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1371, __extension__ __PRETTY_FUNCTION__ )); | |||
1372 | return Target.multiVersionSortPriority(LHS.substr(1)) > | |||
1373 | Target.multiVersionSortPriority(RHS.substr(1)); | |||
1374 | }); | |||
1375 | ||||
1376 | bool IsFirst = true; | |||
1377 | ||||
1378 | if (!Info.CPU.empty()) { | |||
1379 | IsFirst = false; | |||
1380 | Out << "arch_" << Info.CPU; | |||
1381 | } | |||
1382 | ||||
1383 | for (StringRef Feat : Info.Features) { | |||
1384 | if (!IsFirst) | |||
1385 | Out << '_'; | |||
1386 | IsFirst = false; | |||
1387 | Out << Feat.substr(1); | |||
1388 | } | |||
1389 | } | |||
1390 | ||||
1391 | // Returns true if GD is a function decl with internal linkage and | |||
1392 | // needs a unique suffix after the mangled name. | |||
1393 | static bool isUniqueInternalLinkageDecl(GlobalDecl GD, | |||
1394 | CodeGenModule &CGM) { | |||
1395 | const Decl *D = GD.getDecl(); | |||
1396 | return !CGM.getModuleNameHash().empty() && isa<FunctionDecl>(D) && | |||
1397 | (CGM.getFunctionLinkage(GD) == llvm::GlobalValue::InternalLinkage); | |||
1398 | } | |||
1399 | ||||
1400 | static void AppendTargetClonesMangling(const CodeGenModule &CGM, | |||
1401 | const TargetClonesAttr *Attr, | |||
1402 | unsigned VersionIndex, | |||
1403 | raw_ostream &Out) { | |||
1404 | if (CGM.getTarget().getTriple().isAArch64()) { | |||
1405 | StringRef FeatureStr = Attr->getFeatureStr(VersionIndex); | |||
1406 | if (FeatureStr == "default") | |||
1407 | return; | |||
1408 | Out << "._"; | |||
1409 | SmallVector<StringRef, 8> Features; | |||
1410 | FeatureStr.split(Features, "+"); | |||
1411 | for (auto &Feat : Features) { | |||
1412 | Out << 'M'; | |||
1413 | Out << Feat; | |||
1414 | } | |||
1415 | } else { | |||
1416 | Out << '.'; | |||
1417 | StringRef FeatureStr = Attr->getFeatureStr(VersionIndex); | |||
1418 | if (FeatureStr.startswith("arch=")) | |||
1419 | Out << "arch_" << FeatureStr.substr(sizeof("arch=") - 1); | |||
1420 | else | |||
1421 | Out << FeatureStr; | |||
1422 | ||||
1423 | Out << '.' << Attr->getMangledIndex(VersionIndex); | |||
1424 | } | |||
1425 | } | |||
1426 | ||||
1427 | static std::string getMangledNameImpl(CodeGenModule &CGM, GlobalDecl GD, | |||
1428 | const NamedDecl *ND, | |||
1429 | bool OmitMultiVersionMangling = false) { | |||
1430 | SmallString<256> Buffer; | |||
1431 | llvm::raw_svector_ostream Out(Buffer); | |||
1432 | MangleContext &MC = CGM.getCXXABI().getMangleContext(); | |||
1433 | if (!CGM.getModuleNameHash().empty()) | |||
1434 | MC.needsUniqueInternalLinkageNames(); | |||
1435 | bool ShouldMangle = MC.shouldMangleDeclName(ND); | |||
1436 | if (ShouldMangle) | |||
1437 | MC.mangleName(GD.getWithDecl(ND), Out); | |||
1438 | else { | |||
1439 | IdentifierInfo *II = ND->getIdentifier(); | |||
1440 | assert(II && "Attempt to mangle unnamed decl.")(static_cast <bool> (II && "Attempt to mangle unnamed decl." ) ? void (0) : __assert_fail ("II && \"Attempt to mangle unnamed decl.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1440, __extension__ __PRETTY_FUNCTION__ )); | |||
1441 | const auto *FD = dyn_cast<FunctionDecl>(ND); | |||
1442 | ||||
1443 | if (FD && | |||
1444 | FD->getType()->castAs<FunctionType>()->getCallConv() == CC_X86RegCall) { | |||
1445 | Out << "__regcall3__" << II->getName(); | |||
1446 | } else if (FD && FD->hasAttr<CUDAGlobalAttr>() && | |||
1447 | GD.getKernelReferenceKind() == KernelReferenceKind::Stub) { | |||
1448 | Out << "__device_stub__" << II->getName(); | |||
1449 | } else { | |||
1450 | Out << II->getName(); | |||
1451 | } | |||
1452 | } | |||
1453 | ||||
1454 | // Check if the module name hash should be appended for internal linkage | |||
1455 | // symbols. This should come before multi-version target suffixes are | |||
1456 | // appended. This is to keep the name and module hash suffix of the | |||
1457 | // internal linkage function together. The unique suffix should only be | |||
1458 | // added when name mangling is done to make sure that the final name can | |||
1459 | // be properly demangled. For example, for C functions without prototypes, | |||
1460 | // name mangling is not done and the unique suffix should not be appeneded | |||
1461 | // then. | |||
1462 | if (ShouldMangle && isUniqueInternalLinkageDecl(GD, CGM)) { | |||
1463 | assert(CGM.getCodeGenOpts().UniqueInternalLinkageNames &&(static_cast <bool> (CGM.getCodeGenOpts().UniqueInternalLinkageNames && "Hash computed when not explicitly requested") ? void (0) : __assert_fail ("CGM.getCodeGenOpts().UniqueInternalLinkageNames && \"Hash computed when not explicitly requested\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1464, __extension__ __PRETTY_FUNCTION__ )) | |||
1464 | "Hash computed when not explicitly requested")(static_cast <bool> (CGM.getCodeGenOpts().UniqueInternalLinkageNames && "Hash computed when not explicitly requested") ? void (0) : __assert_fail ("CGM.getCodeGenOpts().UniqueInternalLinkageNames && \"Hash computed when not explicitly requested\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1464, __extension__ __PRETTY_FUNCTION__ )); | |||
1465 | Out << CGM.getModuleNameHash(); | |||
1466 | } | |||
1467 | ||||
1468 | if (const auto *FD = dyn_cast<FunctionDecl>(ND)) | |||
1469 | if (FD->isMultiVersion() && !OmitMultiVersionMangling) { | |||
1470 | switch (FD->getMultiVersionKind()) { | |||
1471 | case MultiVersionKind::CPUDispatch: | |||
1472 | case MultiVersionKind::CPUSpecific: | |||
1473 | AppendCPUSpecificCPUDispatchMangling(CGM, | |||
1474 | FD->getAttr<CPUSpecificAttr>(), | |||
1475 | GD.getMultiVersionIndex(), Out); | |||
1476 | break; | |||
1477 | case MultiVersionKind::Target: | |||
1478 | AppendTargetMangling(CGM, FD->getAttr<TargetAttr>(), Out); | |||
1479 | break; | |||
1480 | case MultiVersionKind::TargetVersion: | |||
1481 | AppendTargetVersionMangling(CGM, FD->getAttr<TargetVersionAttr>(), Out); | |||
1482 | break; | |||
1483 | case MultiVersionKind::TargetClones: | |||
1484 | AppendTargetClonesMangling(CGM, FD->getAttr<TargetClonesAttr>(), | |||
1485 | GD.getMultiVersionIndex(), Out); | |||
1486 | break; | |||
1487 | case MultiVersionKind::None: | |||
1488 | llvm_unreachable("None multiversion type isn't valid here")::llvm::llvm_unreachable_internal("None multiversion type isn't valid here" , "clang/lib/CodeGen/CodeGenModule.cpp", 1488); | |||
1489 | } | |||
1490 | } | |||
1491 | ||||
1492 | // Make unique name for device side static file-scope variable for HIP. | |||
1493 | if (CGM.getContext().shouldExternalize(ND) && | |||
1494 | CGM.getLangOpts().GPURelocatableDeviceCode && | |||
1495 | CGM.getLangOpts().CUDAIsDevice) | |||
1496 | CGM.printPostfixForExternalizedDecl(Out, ND); | |||
1497 | ||||
1498 | return std::string(Out.str()); | |||
1499 | } | |||
1500 | ||||
1501 | void CodeGenModule::UpdateMultiVersionNames(GlobalDecl GD, | |||
1502 | const FunctionDecl *FD, | |||
1503 | StringRef &CurName) { | |||
1504 | if (!FD->isMultiVersion()) | |||
1505 | return; | |||
1506 | ||||
1507 | // Get the name of what this would be without the 'target' attribute. This | |||
1508 | // allows us to lookup the version that was emitted when this wasn't a | |||
1509 | // multiversion function. | |||
1510 | std::string NonTargetName = | |||
1511 | getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
1512 | GlobalDecl OtherGD; | |||
1513 | if (lookupRepresentativeDecl(NonTargetName, OtherGD)) { | |||
1514 | assert(OtherGD.getCanonicalDecl()(static_cast <bool> (OtherGD.getCanonicalDecl() .getDecl () ->getAsFunction() ->isMultiVersion() && "Other GD should now be a multiversioned function" ) ? void (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1518, __extension__ __PRETTY_FUNCTION__ )) | |||
1515 | .getDecl()(static_cast <bool> (OtherGD.getCanonicalDecl() .getDecl () ->getAsFunction() ->isMultiVersion() && "Other GD should now be a multiversioned function" ) ? void (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1518, __extension__ __PRETTY_FUNCTION__ )) | |||
1516 | ->getAsFunction()(static_cast <bool> (OtherGD.getCanonicalDecl() .getDecl () ->getAsFunction() ->isMultiVersion() && "Other GD should now be a multiversioned function" ) ? void (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1518, __extension__ __PRETTY_FUNCTION__ )) | |||
1517 | ->isMultiVersion() &&(static_cast <bool> (OtherGD.getCanonicalDecl() .getDecl () ->getAsFunction() ->isMultiVersion() && "Other GD should now be a multiversioned function" ) ? void (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1518, __extension__ __PRETTY_FUNCTION__ )) | |||
1518 | "Other GD should now be a multiversioned function")(static_cast <bool> (OtherGD.getCanonicalDecl() .getDecl () ->getAsFunction() ->isMultiVersion() && "Other GD should now be a multiversioned function" ) ? void (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1518, __extension__ __PRETTY_FUNCTION__ )); | |||
1519 | // OtherFD is the version of this function that was mangled BEFORE | |||
1520 | // becoming a MultiVersion function. It potentially needs to be updated. | |||
1521 | const FunctionDecl *OtherFD = OtherGD.getCanonicalDecl() | |||
1522 | .getDecl() | |||
1523 | ->getAsFunction() | |||
1524 | ->getMostRecentDecl(); | |||
1525 | std::string OtherName = getMangledNameImpl(*this, OtherGD, OtherFD); | |||
1526 | // This is so that if the initial version was already the 'default' | |||
1527 | // version, we don't try to update it. | |||
1528 | if (OtherName != NonTargetName) { | |||
1529 | // Remove instead of erase, since others may have stored the StringRef | |||
1530 | // to this. | |||
1531 | const auto ExistingRecord = Manglings.find(NonTargetName); | |||
1532 | if (ExistingRecord != std::end(Manglings)) | |||
1533 | Manglings.remove(&(*ExistingRecord)); | |||
1534 | auto Result = Manglings.insert(std::make_pair(OtherName, OtherGD)); | |||
1535 | StringRef OtherNameRef = MangledDeclNames[OtherGD.getCanonicalDecl()] = | |||
1536 | Result.first->first(); | |||
1537 | // If this is the current decl is being created, make sure we update the name. | |||
1538 | if (GD.getCanonicalDecl() == OtherGD.getCanonicalDecl()) | |||
1539 | CurName = OtherNameRef; | |||
1540 | if (llvm::GlobalValue *Entry = GetGlobalValue(NonTargetName)) | |||
1541 | Entry->setName(OtherName); | |||
1542 | } | |||
1543 | } | |||
1544 | } | |||
1545 | ||||
1546 | StringRef CodeGenModule::getMangledName(GlobalDecl GD) { | |||
1547 | GlobalDecl CanonicalGD = GD.getCanonicalDecl(); | |||
1548 | ||||
1549 | // Some ABIs don't have constructor variants. Make sure that base and | |||
1550 | // complete constructors get mangled the same. | |||
1551 | if (const auto *CD = dyn_cast<CXXConstructorDecl>(CanonicalGD.getDecl())) { | |||
1552 | if (!getTarget().getCXXABI().hasConstructorVariants()) { | |||
1553 | CXXCtorType OrigCtorType = GD.getCtorType(); | |||
1554 | assert(OrigCtorType == Ctor_Base || OrigCtorType == Ctor_Complete)(static_cast <bool> (OrigCtorType == Ctor_Base || OrigCtorType == Ctor_Complete) ? void (0) : __assert_fail ("OrigCtorType == Ctor_Base || OrigCtorType == Ctor_Complete" , "clang/lib/CodeGen/CodeGenModule.cpp", 1554, __extension__ __PRETTY_FUNCTION__ )); | |||
1555 | if (OrigCtorType == Ctor_Base) | |||
1556 | CanonicalGD = GlobalDecl(CD, Ctor_Complete); | |||
1557 | } | |||
1558 | } | |||
1559 | ||||
1560 | // In CUDA/HIP device compilation with -fgpu-rdc, the mangled name of a | |||
1561 | // static device variable depends on whether the variable is referenced by | |||
1562 | // a host or device host function. Therefore the mangled name cannot be | |||
1563 | // cached. | |||
1564 | if (!LangOpts.CUDAIsDevice || !getContext().mayExternalize(GD.getDecl())) { | |||
1565 | auto FoundName = MangledDeclNames.find(CanonicalGD); | |||
1566 | if (FoundName != MangledDeclNames.end()) | |||
1567 | return FoundName->second; | |||
1568 | } | |||
1569 | ||||
1570 | // Keep the first result in the case of a mangling collision. | |||
1571 | const auto *ND = cast<NamedDecl>(GD.getDecl()); | |||
1572 | std::string MangledName = getMangledNameImpl(*this, GD, ND); | |||
1573 | ||||
1574 | // Ensure either we have different ABIs between host and device compilations, | |||
1575 | // says host compilation following MSVC ABI but device compilation follows | |||
1576 | // Itanium C++ ABI or, if they follow the same ABI, kernel names after | |||
1577 | // mangling should be the same after name stubbing. The later checking is | |||
1578 | // very important as the device kernel name being mangled in host-compilation | |||
1579 | // is used to resolve the device binaries to be executed. Inconsistent naming | |||
1580 | // result in undefined behavior. Even though we cannot check that naming | |||
1581 | // directly between host- and device-compilations, the host- and | |||
1582 | // device-mangling in host compilation could help catching certain ones. | |||
1583 | assert(!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() ||(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1584 | getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice ||(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1585 | (getContext().getAuxTargetInfo() &&(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1586 | (getContext().getAuxTargetInfo()->getCXXABI() !=(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1587 | getContext().getTargetInfo().getCXXABI())) ||(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1588 | getCUDARuntime().getDeviceSideName(ND) ==(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1589 | getMangledNameImpl((static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1590 | *this,(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1591 | GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel),(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )) | |||
1592 | ND))(static_cast <bool> (!isa<FunctionDecl>(ND) || !ND ->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize (ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo () && (getContext().getAuxTargetInfo()->getCXXABI( ) != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime ().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind (KernelReferenceKind::Kernel), ND)) ? void (0) : __assert_fail ("!isa<FunctionDecl>(ND) || !ND->hasAttr<CUDAGlobalAttr>() || getContext().shouldExternalize(ND) || getLangOpts().CUDAIsDevice || (getContext().getAuxTargetInfo() && (getContext().getAuxTargetInfo()->getCXXABI() != getContext().getTargetInfo().getCXXABI())) || getCUDARuntime().getDeviceSideName(ND) == getMangledNameImpl( *this, GD.getWithKernelReferenceKind(KernelReferenceKind::Kernel), ND)" , "clang/lib/CodeGen/CodeGenModule.cpp", 1592, __extension__ __PRETTY_FUNCTION__ )); | |||
1593 | ||||
1594 | auto Result = Manglings.insert(std::make_pair(MangledName, GD)); | |||
1595 | return MangledDeclNames[CanonicalGD] = Result.first->first(); | |||
1596 | } | |||
1597 | ||||
1598 | StringRef CodeGenModule::getBlockMangledName(GlobalDecl GD, | |||
1599 | const BlockDecl *BD) { | |||
1600 | MangleContext &MangleCtx = getCXXABI().getMangleContext(); | |||
1601 | const Decl *D = GD.getDecl(); | |||
1602 | ||||
1603 | SmallString<256> Buffer; | |||
1604 | llvm::raw_svector_ostream Out(Buffer); | |||
1605 | if (!D) | |||
1606 | MangleCtx.mangleGlobalBlock(BD, | |||
1607 | dyn_cast_or_null<VarDecl>(initializedGlobalDecl.getDecl()), Out); | |||
1608 | else if (const auto *CD = dyn_cast<CXXConstructorDecl>(D)) | |||
1609 | MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); | |||
1610 | else if (const auto *DD = dyn_cast<CXXDestructorDecl>(D)) | |||
1611 | MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); | |||
1612 | else | |||
1613 | MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); | |||
1614 | ||||
1615 | auto Result = Manglings.insert(std::make_pair(Out.str(), BD)); | |||
1616 | return Result.first->first(); | |||
1617 | } | |||
1618 | ||||
1619 | const GlobalDecl CodeGenModule::getMangledNameDecl(StringRef Name) { | |||
1620 | auto it = MangledDeclNames.begin(); | |||
1621 | while (it != MangledDeclNames.end()) { | |||
1622 | if (it->second == Name) | |||
1623 | return it->first; | |||
1624 | it++; | |||
1625 | } | |||
1626 | return GlobalDecl(); | |||
1627 | } | |||
1628 | ||||
1629 | llvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { | |||
1630 | return getModule().getNamedValue(Name); | |||
1631 | } | |||
1632 | ||||
1633 | /// AddGlobalCtor - Add a function to the list that will be called before | |||
1634 | /// main() runs. | |||
1635 | void CodeGenModule::AddGlobalCtor(llvm::Function *Ctor, int Priority, | |||
1636 | unsigned LexOrder, | |||
1637 | llvm::Constant *AssociatedData) { | |||
1638 | // FIXME: Type coercion of void()* types. | |||
1639 | GlobalCtors.push_back(Structor(Priority, LexOrder, Ctor, AssociatedData)); | |||
1640 | } | |||
1641 | ||||
1642 | /// AddGlobalDtor - Add a function to the list that will be called | |||
1643 | /// when the module is unloaded. | |||
1644 | void CodeGenModule::AddGlobalDtor(llvm::Function *Dtor, int Priority, | |||
1645 | bool IsDtorAttrFunc) { | |||
1646 | if (CodeGenOpts.RegisterGlobalDtorsWithAtExit && | |||
1647 | (!getContext().getTargetInfo().getTriple().isOSAIX() || IsDtorAttrFunc)) { | |||
1648 | DtorsUsingAtExit[Priority].push_back(Dtor); | |||
1649 | return; | |||
1650 | } | |||
1651 | ||||
1652 | // FIXME: Type coercion of void()* types. | |||
1653 | GlobalDtors.push_back(Structor(Priority, ~0U, Dtor, nullptr)); | |||
1654 | } | |||
1655 | ||||
1656 | void CodeGenModule::EmitCtorList(CtorList &Fns, const char *GlobalName) { | |||
1657 | if (Fns.empty()) return; | |||
1658 | ||||
1659 | // Ctor function type is void()*. | |||
1660 | llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); | |||
1661 | llvm::Type *CtorPFTy = llvm::PointerType::get(CtorFTy, | |||
1662 | TheModule.getDataLayout().getProgramAddressSpace()); | |||
1663 | ||||
1664 | // Get the type of a ctor entry, { i32, void ()*, i8* }. | |||
1665 | llvm::StructType *CtorStructTy = llvm::StructType::get( | |||
1666 | Int32Ty, CtorPFTy, VoidPtrTy); | |||
1667 | ||||
1668 | // Construct the constructor and destructor arrays. | |||
1669 | ConstantInitBuilder builder(*this); | |||
1670 | auto ctors = builder.beginArray(CtorStructTy); | |||
1671 | for (const auto &I : Fns) { | |||
1672 | auto ctor = ctors.beginStruct(CtorStructTy); | |||
1673 | ctor.addInt(Int32Ty, I.Priority); | |||
1674 | ctor.add(llvm::ConstantExpr::getBitCast(I.Initializer, CtorPFTy)); | |||
1675 | if (I.AssociatedData) | |||
1676 | ctor.add(llvm::ConstantExpr::getBitCast(I.AssociatedData, VoidPtrTy)); | |||
1677 | else | |||
1678 | ctor.addNullPointer(VoidPtrTy); | |||
1679 | ctor.finishAndAddTo(ctors); | |||
1680 | } | |||
1681 | ||||
1682 | auto list = | |||
1683 | ctors.finishAndCreateGlobal(GlobalName, getPointerAlign(), | |||
1684 | /*constant*/ false, | |||
1685 | llvm::GlobalValue::AppendingLinkage); | |||
1686 | ||||
1687 | // The LTO linker doesn't seem to like it when we set an alignment | |||
1688 | // on appending variables. Take it off as a workaround. | |||
1689 | list->setAlignment(std::nullopt); | |||
1690 | ||||
1691 | Fns.clear(); | |||
1692 | } | |||
1693 | ||||
1694 | llvm::GlobalValue::LinkageTypes | |||
1695 | CodeGenModule::getFunctionLinkage(GlobalDecl GD) { | |||
1696 | const auto *D = cast<FunctionDecl>(GD.getDecl()); | |||
1697 | ||||
1698 | GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); | |||
1699 | ||||
1700 | if (const auto *Dtor = dyn_cast<CXXDestructorDecl>(D)) | |||
1701 | return getCXXABI().getCXXDestructorLinkage(Linkage, Dtor, GD.getDtorType()); | |||
1702 | ||||
1703 | if (isa<CXXConstructorDecl>(D) && | |||
1704 | cast<CXXConstructorDecl>(D)->isInheritingConstructor() && | |||
1705 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
1706 | // Our approach to inheriting constructors is fundamentally different from | |||
1707 | // that used by the MS ABI, so keep our inheriting constructor thunks | |||
1708 | // internal rather than trying to pick an unambiguous mangling for them. | |||
1709 | return llvm::GlobalValue::InternalLinkage; | |||
1710 | } | |||
1711 | ||||
1712 | return getLLVMLinkageForDeclarator(D, Linkage, /*IsConstantVariable=*/false); | |||
1713 | } | |||
1714 | ||||
1715 | llvm::ConstantInt *CodeGenModule::CreateCrossDsoCfiTypeId(llvm::Metadata *MD) { | |||
1716 | llvm::MDString *MDS = dyn_cast<llvm::MDString>(MD); | |||
1717 | if (!MDS) return nullptr; | |||
1718 | ||||
1719 | return llvm::ConstantInt::get(Int64Ty, llvm::MD5Hash(MDS->getString())); | |||
1720 | } | |||
1721 | ||||
1722 | llvm::ConstantInt *CodeGenModule::CreateKCFITypeId(QualType T) { | |||
1723 | if (auto *FnType = T->getAs<FunctionProtoType>()) | |||
1724 | T = getContext().getFunctionType( | |||
1725 | FnType->getReturnType(), FnType->getParamTypes(), | |||
1726 | FnType->getExtProtoInfo().withExceptionSpec(EST_None)); | |||
1727 | ||||
1728 | std::string OutName; | |||
1729 | llvm::raw_string_ostream Out(OutName); | |||
1730 | getCXXABI().getMangleContext().mangleTypeName(T, Out); | |||
1731 | ||||
1732 | return llvm::ConstantInt::get(Int32Ty, | |||
1733 | static_cast<uint32_t>(llvm::xxHash64(OutName))); | |||
1734 | } | |||
1735 | ||||
1736 | void CodeGenModule::SetLLVMFunctionAttributes(GlobalDecl GD, | |||
1737 | const CGFunctionInfo &Info, | |||
1738 | llvm::Function *F, bool IsThunk) { | |||
1739 | unsigned CallingConv; | |||
1740 | llvm::AttributeList PAL; | |||
1741 | ConstructAttributeList(F->getName(), Info, GD, PAL, CallingConv, | |||
1742 | /*AttrOnCallSite=*/false, IsThunk); | |||
1743 | F->setAttributes(PAL); | |||
1744 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); | |||
1745 | } | |||
1746 | ||||
1747 | static void removeImageAccessQualifier(std::string& TyName) { | |||
1748 | std::string ReadOnlyQual("__read_only"); | |||
1749 | std::string::size_type ReadOnlyPos = TyName.find(ReadOnlyQual); | |||
1750 | if (ReadOnlyPos != std::string::npos) | |||
1751 | // "+ 1" for the space after access qualifier. | |||
1752 | TyName.erase(ReadOnlyPos, ReadOnlyQual.size() + 1); | |||
1753 | else { | |||
1754 | std::string WriteOnlyQual("__write_only"); | |||
1755 | std::string::size_type WriteOnlyPos = TyName.find(WriteOnlyQual); | |||
1756 | if (WriteOnlyPos != std::string::npos) | |||
1757 | TyName.erase(WriteOnlyPos, WriteOnlyQual.size() + 1); | |||
1758 | else { | |||
1759 | std::string ReadWriteQual("__read_write"); | |||
1760 | std::string::size_type ReadWritePos = TyName.find(ReadWriteQual); | |||
1761 | if (ReadWritePos != std::string::npos) | |||
1762 | TyName.erase(ReadWritePos, ReadWriteQual.size() + 1); | |||
1763 | } | |||
1764 | } | |||
1765 | } | |||
1766 | ||||
1767 | // Returns the address space id that should be produced to the | |||
1768 | // kernel_arg_addr_space metadata. This is always fixed to the ids | |||
1769 | // as specified in the SPIR 2.0 specification in order to differentiate | |||
1770 | // for example in clGetKernelArgInfo() implementation between the address | |||
1771 | // spaces with targets without unique mapping to the OpenCL address spaces | |||
1772 | // (basically all single AS CPUs). | |||
1773 | static unsigned ArgInfoAddressSpace(LangAS AS) { | |||
1774 | switch (AS) { | |||
1775 | case LangAS::opencl_global: | |||
1776 | return 1; | |||
1777 | case LangAS::opencl_constant: | |||
1778 | return 2; | |||
1779 | case LangAS::opencl_local: | |||
1780 | return 3; | |||
1781 | case LangAS::opencl_generic: | |||
1782 | return 4; // Not in SPIR 2.0 specs. | |||
1783 | case LangAS::opencl_global_device: | |||
1784 | return 5; | |||
1785 | case LangAS::opencl_global_host: | |||
1786 | return 6; | |||
1787 | default: | |||
1788 | return 0; // Assume private. | |||
1789 | } | |||
1790 | } | |||
1791 | ||||
1792 | void CodeGenModule::GenKernelArgMetadata(llvm::Function *Fn, | |||
1793 | const FunctionDecl *FD, | |||
1794 | CodeGenFunction *CGF) { | |||
1795 | assert(((FD && CGF) || (!FD && !CGF)) &&(static_cast <bool> (((FD && CGF) || (!FD && !CGF)) && "Incorrect use - FD and CGF should either be both null or not!" ) ? void (0) : __assert_fail ("((FD && CGF) || (!FD && !CGF)) && \"Incorrect use - FD and CGF should either be both null or not!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1796, __extension__ __PRETTY_FUNCTION__ )) | |||
1796 | "Incorrect use - FD and CGF should either be both null or not!")(static_cast <bool> (((FD && CGF) || (!FD && !CGF)) && "Incorrect use - FD and CGF should either be both null or not!" ) ? void (0) : __assert_fail ("((FD && CGF) || (!FD && !CGF)) && \"Incorrect use - FD and CGF should either be both null or not!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 1796, __extension__ __PRETTY_FUNCTION__ )); | |||
1797 | // Create MDNodes that represent the kernel arg metadata. | |||
1798 | // Each MDNode is a list in the form of "key", N number of values which is | |||
1799 | // the same number of values as their are kernel arguments. | |||
1800 | ||||
1801 | const PrintingPolicy &Policy = Context.getPrintingPolicy(); | |||
1802 | ||||
1803 | // MDNode for the kernel argument address space qualifiers. | |||
1804 | SmallVector<llvm::Metadata *, 8> addressQuals; | |||
1805 | ||||
1806 | // MDNode for the kernel argument access qualifiers (images only). | |||
1807 | SmallVector<llvm::Metadata *, 8> accessQuals; | |||
1808 | ||||
1809 | // MDNode for the kernel argument type names. | |||
1810 | SmallVector<llvm::Metadata *, 8> argTypeNames; | |||
1811 | ||||
1812 | // MDNode for the kernel argument base type names. | |||
1813 | SmallVector<llvm::Metadata *, 8> argBaseTypeNames; | |||
1814 | ||||
1815 | // MDNode for the kernel argument type qualifiers. | |||
1816 | SmallVector<llvm::Metadata *, 8> argTypeQuals; | |||
1817 | ||||
1818 | // MDNode for the kernel argument names. | |||
1819 | SmallVector<llvm::Metadata *, 8> argNames; | |||
1820 | ||||
1821 | if (FD && CGF) | |||
1822 | for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) { | |||
1823 | const ParmVarDecl *parm = FD->getParamDecl(i); | |||
1824 | // Get argument name. | |||
1825 | argNames.push_back(llvm::MDString::get(VMContext, parm->getName())); | |||
1826 | ||||
1827 | if (!getLangOpts().OpenCL) | |||
1828 | continue; | |||
1829 | QualType ty = parm->getType(); | |||
1830 | std::string typeQuals; | |||
1831 | ||||
1832 | // Get image and pipe access qualifier: | |||
1833 | if (ty->isImageType() || ty->isPipeType()) { | |||
1834 | const Decl *PDecl = parm; | |||
1835 | if (const auto *TD = ty->getAs<TypedefType>()) | |||
1836 | PDecl = TD->getDecl(); | |||
1837 | const OpenCLAccessAttr *A = PDecl->getAttr<OpenCLAccessAttr>(); | |||
1838 | if (A && A->isWriteOnly()) | |||
1839 | accessQuals.push_back(llvm::MDString::get(VMContext, "write_only")); | |||
1840 | else if (A && A->isReadWrite()) | |||
1841 | accessQuals.push_back(llvm::MDString::get(VMContext, "read_write")); | |||
1842 | else | |||
1843 | accessQuals.push_back(llvm::MDString::get(VMContext, "read_only")); | |||
1844 | } else | |||
1845 | accessQuals.push_back(llvm::MDString::get(VMContext, "none")); | |||
1846 | ||||
1847 | auto getTypeSpelling = [&](QualType Ty) { | |||
1848 | auto typeName = Ty.getUnqualifiedType().getAsString(Policy); | |||
1849 | ||||
1850 | if (Ty.isCanonical()) { | |||
1851 | StringRef typeNameRef = typeName; | |||
1852 | // Turn "unsigned type" to "utype" | |||
1853 | if (typeNameRef.consume_front("unsigned ")) | |||
1854 | return std::string("u") + typeNameRef.str(); | |||
1855 | if (typeNameRef.consume_front("signed ")) | |||
1856 | return typeNameRef.str(); | |||
1857 | } | |||
1858 | ||||
1859 | return typeName; | |||
1860 | }; | |||
1861 | ||||
1862 | if (ty->isPointerType()) { | |||
1863 | QualType pointeeTy = ty->getPointeeType(); | |||
1864 | ||||
1865 | // Get address qualifier. | |||
1866 | addressQuals.push_back( | |||
1867 | llvm::ConstantAsMetadata::get(CGF->Builder.getInt32( | |||
1868 | ArgInfoAddressSpace(pointeeTy.getAddressSpace())))); | |||
1869 | ||||
1870 | // Get argument type name. | |||
1871 | std::string typeName = getTypeSpelling(pointeeTy) + "*"; | |||
1872 | std::string baseTypeName = | |||
1873 | getTypeSpelling(pointeeTy.getCanonicalType()) + "*"; | |||
1874 | argTypeNames.push_back(llvm::MDString::get(VMContext, typeName)); | |||
1875 | argBaseTypeNames.push_back( | |||
1876 | llvm::MDString::get(VMContext, baseTypeName)); | |||
1877 | ||||
1878 | // Get argument type qualifiers: | |||
1879 | if (ty.isRestrictQualified()) | |||
1880 | typeQuals = "restrict"; | |||
1881 | if (pointeeTy.isConstQualified() || | |||
1882 | (pointeeTy.getAddressSpace() == LangAS::opencl_constant)) | |||
1883 | typeQuals += typeQuals.empty() ? "const" : " const"; | |||
1884 | if (pointeeTy.isVolatileQualified()) | |||
1885 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; | |||
1886 | } else { | |||
1887 | uint32_t AddrSpc = 0; | |||
1888 | bool isPipe = ty->isPipeType(); | |||
1889 | if (ty->isImageType() || isPipe) | |||
1890 | AddrSpc = ArgInfoAddressSpace(LangAS::opencl_global); | |||
1891 | ||||
1892 | addressQuals.push_back( | |||
1893 | llvm::ConstantAsMetadata::get(CGF->Builder.getInt32(AddrSpc))); | |||
1894 | ||||
1895 | // Get argument type name. | |||
1896 | ty = isPipe ? ty->castAs<PipeType>()->getElementType() : ty; | |||
1897 | std::string typeName = getTypeSpelling(ty); | |||
1898 | std::string baseTypeName = getTypeSpelling(ty.getCanonicalType()); | |||
1899 | ||||
1900 | // Remove access qualifiers on images | |||
1901 | // (as they are inseparable from type in clang implementation, | |||
1902 | // but OpenCL spec provides a special query to get access qualifier | |||
1903 | // via clGetKernelArgInfo with CL_KERNEL_ARG_ACCESS_QUALIFIER): | |||
1904 | if (ty->isImageType()) { | |||
1905 | removeImageAccessQualifier(typeName); | |||
1906 | removeImageAccessQualifier(baseTypeName); | |||
1907 | } | |||
1908 | ||||
1909 | argTypeNames.push_back(llvm::MDString::get(VMContext, typeName)); | |||
1910 | argBaseTypeNames.push_back( | |||
1911 | llvm::MDString::get(VMContext, baseTypeName)); | |||
1912 | ||||
1913 | if (isPipe) | |||
1914 | typeQuals = "pipe"; | |||
1915 | } | |||
1916 | argTypeQuals.push_back(llvm::MDString::get(VMContext, typeQuals)); | |||
1917 | } | |||
1918 | ||||
1919 | if (getLangOpts().OpenCL) { | |||
1920 | Fn->setMetadata("kernel_arg_addr_space", | |||
1921 | llvm::MDNode::get(VMContext, addressQuals)); | |||
1922 | Fn->setMetadata("kernel_arg_access_qual", | |||
1923 | llvm::MDNode::get(VMContext, accessQuals)); | |||
1924 | Fn->setMetadata("kernel_arg_type", | |||
1925 | llvm::MDNode::get(VMContext, argTypeNames)); | |||
1926 | Fn->setMetadata("kernel_arg_base_type", | |||
1927 | llvm::MDNode::get(VMContext, argBaseTypeNames)); | |||
1928 | Fn->setMetadata("kernel_arg_type_qual", | |||
1929 | llvm::MDNode::get(VMContext, argTypeQuals)); | |||
1930 | } | |||
1931 | if (getCodeGenOpts().EmitOpenCLArgMetadata || | |||
1932 | getCodeGenOpts().HIPSaveKernelArgName) | |||
1933 | Fn->setMetadata("kernel_arg_name", | |||
1934 | llvm::MDNode::get(VMContext, argNames)); | |||
1935 | } | |||
1936 | ||||
1937 | /// Determines whether the language options require us to model | |||
1938 | /// unwind exceptions. We treat -fexceptions as mandating this | |||
1939 | /// except under the fragile ObjC ABI with only ObjC exceptions | |||
1940 | /// enabled. This means, for example, that C with -fexceptions | |||
1941 | /// enables this. | |||
1942 | static bool hasUnwindExceptions(const LangOptions &LangOpts) { | |||
1943 | // If exceptions are completely disabled, obviously this is false. | |||
1944 | if (!LangOpts.Exceptions) return false; | |||
1945 | ||||
1946 | // If C++ exceptions are enabled, this is true. | |||
1947 | if (LangOpts.CXXExceptions) return true; | |||
1948 | ||||
1949 | // If ObjC exceptions are enabled, this depends on the ABI. | |||
1950 | if (LangOpts.ObjCExceptions) { | |||
1951 | return LangOpts.ObjCRuntime.hasUnwindExceptions(); | |||
1952 | } | |||
1953 | ||||
1954 | return true; | |||
1955 | } | |||
1956 | ||||
1957 | static bool requiresMemberFunctionPointerTypeMetadata(CodeGenModule &CGM, | |||
1958 | const CXXMethodDecl *MD) { | |||
1959 | // Check that the type metadata can ever actually be used by a call. | |||
1960 | if (!CGM.getCodeGenOpts().LTOUnit || | |||
1961 | !CGM.HasHiddenLTOVisibility(MD->getParent())) | |||
1962 | return false; | |||
1963 | ||||
1964 | // Only functions whose address can be taken with a member function pointer | |||
1965 | // need this sort of type metadata. | |||
1966 | return !MD->isStatic() && !MD->isVirtual() && !isa<CXXConstructorDecl>(MD) && | |||
1967 | !isa<CXXDestructorDecl>(MD); | |||
1968 | } | |||
1969 | ||||
1970 | std::vector<const CXXRecordDecl *> | |||
1971 | CodeGenModule::getMostBaseClasses(const CXXRecordDecl *RD) { | |||
1972 | llvm::SetVector<const CXXRecordDecl *> MostBases; | |||
1973 | ||||
1974 | std::function<void (const CXXRecordDecl *)> CollectMostBases; | |||
1975 | CollectMostBases = [&](const CXXRecordDecl *RD) { | |||
1976 | if (RD->getNumBases() == 0) | |||
1977 | MostBases.insert(RD); | |||
1978 | for (const CXXBaseSpecifier &B : RD->bases()) | |||
1979 | CollectMostBases(B.getType()->getAsCXXRecordDecl()); | |||
1980 | }; | |||
1981 | CollectMostBases(RD); | |||
1982 | return MostBases.takeVector(); | |||
1983 | } | |||
1984 | ||||
1985 | llvm::GlobalVariable * | |||
1986 | CodeGenModule::GetOrCreateRTTIProxyGlobalVariable(llvm::Constant *Addr) { | |||
1987 | auto It = RTTIProxyMap.find(Addr); | |||
1988 | if (It != RTTIProxyMap.end()) | |||
1989 | return It->second; | |||
1990 | ||||
1991 | auto *FTRTTIProxy = new llvm::GlobalVariable( | |||
1992 | TheModule, Addr->getType(), | |||
1993 | /*isConstant=*/true, llvm::GlobalValue::PrivateLinkage, Addr, | |||
1994 | "__llvm_rtti_proxy"); | |||
1995 | FTRTTIProxy->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
1996 | ||||
1997 | RTTIProxyMap[Addr] = FTRTTIProxy; | |||
1998 | return FTRTTIProxy; | |||
1999 | } | |||
2000 | ||||
2001 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, | |||
2002 | llvm::Function *F) { | |||
2003 | llvm::AttrBuilder B(F->getContext()); | |||
2004 | ||||
2005 | if ((!D || !D->hasAttr<NoUwtableAttr>()) && CodeGenOpts.UnwindTables) | |||
2006 | B.addUWTableAttr(llvm::UWTableKind(CodeGenOpts.UnwindTables)); | |||
2007 | ||||
2008 | if (CodeGenOpts.StackClashProtector) | |||
2009 | B.addAttribute("probe-stack", "inline-asm"); | |||
2010 | ||||
2011 | if (!hasUnwindExceptions(LangOpts)) | |||
2012 | B.addAttribute(llvm::Attribute::NoUnwind); | |||
2013 | ||||
2014 | if (D && D->hasAttr<NoStackProtectorAttr>()) | |||
2015 | ; // Do nothing. | |||
2016 | else if (D && D->hasAttr<StrictGuardStackCheckAttr>() && | |||
2017 | LangOpts.getStackProtector() == LangOptions::SSPOn) | |||
2018 | B.addAttribute(llvm::Attribute::StackProtectStrong); | |||
2019 | else if (LangOpts.getStackProtector() == LangOptions::SSPOn) | |||
2020 | B.addAttribute(llvm::Attribute::StackProtect); | |||
2021 | else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) | |||
2022 | B.addAttribute(llvm::Attribute::StackProtectStrong); | |||
2023 | else if (LangOpts.getStackProtector() == LangOptions::SSPReq) | |||
2024 | B.addAttribute(llvm::Attribute::StackProtectReq); | |||
2025 | ||||
2026 | if (!D) { | |||
2027 | // If we don't have a declaration to control inlining, the function isn't | |||
2028 | // explicitly marked as alwaysinline for semantic reasons, and inlining is | |||
2029 | // disabled, mark the function as noinline. | |||
2030 | if (!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && | |||
2031 | CodeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) | |||
2032 | B.addAttribute(llvm::Attribute::NoInline); | |||
2033 | ||||
2034 | F->addFnAttrs(B); | |||
2035 | return; | |||
2036 | } | |||
2037 | ||||
2038 | // Track whether we need to add the optnone LLVM attribute, | |||
2039 | // starting with the default for this optimization level. | |||
2040 | bool ShouldAddOptNone = | |||
2041 | !CodeGenOpts.DisableO0ImplyOptNone && CodeGenOpts.OptimizationLevel == 0; | |||
2042 | // We can't add optnone in the following cases, it won't pass the verifier. | |||
2043 | ShouldAddOptNone &= !D->hasAttr<MinSizeAttr>(); | |||
2044 | ShouldAddOptNone &= !D->hasAttr<AlwaysInlineAttr>(); | |||
2045 | ||||
2046 | // Add optnone, but do so only if the function isn't always_inline. | |||
2047 | if ((ShouldAddOptNone || D->hasAttr<OptimizeNoneAttr>()) && | |||
2048 | !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
2049 | B.addAttribute(llvm::Attribute::OptimizeNone); | |||
2050 | ||||
2051 | // OptimizeNone implies noinline; we should not be inlining such functions. | |||
2052 | B.addAttribute(llvm::Attribute::NoInline); | |||
2053 | ||||
2054 | // We still need to handle naked functions even though optnone subsumes | |||
2055 | // much of their semantics. | |||
2056 | if (D->hasAttr<NakedAttr>()) | |||
2057 | B.addAttribute(llvm::Attribute::Naked); | |||
2058 | ||||
2059 | // OptimizeNone wins over OptimizeForSize and MinSize. | |||
2060 | F->removeFnAttr(llvm::Attribute::OptimizeForSize); | |||
2061 | F->removeFnAttr(llvm::Attribute::MinSize); | |||
2062 | } else if (D->hasAttr<NakedAttr>()) { | |||
2063 | // Naked implies noinline: we should not be inlining such functions. | |||
2064 | B.addAttribute(llvm::Attribute::Naked); | |||
2065 | B.addAttribute(llvm::Attribute::NoInline); | |||
2066 | } else if (D->hasAttr<NoDuplicateAttr>()) { | |||
2067 | B.addAttribute(llvm::Attribute::NoDuplicate); | |||
2068 | } else if (D->hasAttr<NoInlineAttr>() && !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
2069 | // Add noinline if the function isn't always_inline. | |||
2070 | B.addAttribute(llvm::Attribute::NoInline); | |||
2071 | } else if (D->hasAttr<AlwaysInlineAttr>() && | |||
2072 | !F->hasFnAttribute(llvm::Attribute::NoInline)) { | |||
2073 | // (noinline wins over always_inline, and we can't specify both in IR) | |||
2074 | B.addAttribute(llvm::Attribute::AlwaysInline); | |||
2075 | } else if (CodeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) { | |||
2076 | // If we're not inlining, then force everything that isn't always_inline to | |||
2077 | // carry an explicit noinline attribute. | |||
2078 | if (!F->hasFnAttribute(llvm::Attribute::AlwaysInline)) | |||
2079 | B.addAttribute(llvm::Attribute::NoInline); | |||
2080 | } else { | |||
2081 | // Otherwise, propagate the inline hint attribute and potentially use its | |||
2082 | // absence to mark things as noinline. | |||
2083 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
2084 | // Search function and template pattern redeclarations for inline. | |||
2085 | auto CheckForInline = [](const FunctionDecl *FD) { | |||
2086 | auto CheckRedeclForInline = [](const FunctionDecl *Redecl) { | |||
2087 | return Redecl->isInlineSpecified(); | |||
2088 | }; | |||
2089 | if (any_of(FD->redecls(), CheckRedeclForInline)) | |||
2090 | return true; | |||
2091 | const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern(); | |||
2092 | if (!Pattern) | |||
2093 | return false; | |||
2094 | return any_of(Pattern->redecls(), CheckRedeclForInline); | |||
2095 | }; | |||
2096 | if (CheckForInline(FD)) { | |||
2097 | B.addAttribute(llvm::Attribute::InlineHint); | |||
2098 | } else if (CodeGenOpts.getInlining() == | |||
2099 | CodeGenOptions::OnlyHintInlining && | |||
2100 | !FD->isInlined() && | |||
2101 | !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
2102 | B.addAttribute(llvm::Attribute::NoInline); | |||
2103 | } | |||
2104 | } | |||
2105 | } | |||
2106 | ||||
2107 | // Add other optimization related attributes if we are optimizing this | |||
2108 | // function. | |||
2109 | if (!D->hasAttr<OptimizeNoneAttr>()) { | |||
2110 | if (D->hasAttr<ColdAttr>()) { | |||
2111 | if (!ShouldAddOptNone) | |||
2112 | B.addAttribute(llvm::Attribute::OptimizeForSize); | |||
2113 | B.addAttribute(llvm::Attribute::Cold); | |||
2114 | } | |||
2115 | if (D->hasAttr<HotAttr>()) | |||
2116 | B.addAttribute(llvm::Attribute::Hot); | |||
2117 | if (D->hasAttr<MinSizeAttr>()) | |||
2118 | B.addAttribute(llvm::Attribute::MinSize); | |||
2119 | } | |||
2120 | ||||
2121 | F->addFnAttrs(B); | |||
2122 | ||||
2123 | unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); | |||
2124 | if (alignment) | |||
2125 | F->setAlignment(llvm::Align(alignment)); | |||
2126 | ||||
2127 | if (!D->hasAttr<AlignedAttr>()) | |||
2128 | if (LangOpts.FunctionAlignment) | |||
2129 | F->setAlignment(llvm::Align(1ull << LangOpts.FunctionAlignment)); | |||
2130 | ||||
2131 | // Some C++ ABIs require 2-byte alignment for member functions, in order to | |||
2132 | // reserve a bit for differentiating between virtual and non-virtual member | |||
2133 | // functions. If the current target's C++ ABI requires this and this is a | |||
2134 | // member function, set its alignment accordingly. | |||
2135 | if (getTarget().getCXXABI().areMemberFunctionsAligned()) { | |||
2136 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) | |||
2137 | F->setAlignment(llvm::Align(2)); | |||
2138 | } | |||
2139 | ||||
2140 | // In the cross-dso CFI mode with canonical jump tables, we want !type | |||
2141 | // attributes on definitions only. | |||
2142 | if (CodeGenOpts.SanitizeCfiCrossDso && | |||
2143 | CodeGenOpts.SanitizeCfiCanonicalJumpTables) { | |||
2144 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
2145 | // Skip available_externally functions. They won't be codegen'ed in the | |||
2146 | // current module anyway. | |||
2147 | if (getContext().GetGVALinkageForFunction(FD) != GVA_AvailableExternally) | |||
2148 | CreateFunctionTypeMetadataForIcall(FD, F); | |||
2149 | } | |||
2150 | } | |||
2151 | ||||
2152 | // Emit type metadata on member functions for member function pointer checks. | |||
2153 | // These are only ever necessary on definitions; we're guaranteed that the | |||
2154 | // definition will be present in the LTO unit as a result of LTO visibility. | |||
2155 | auto *MD = dyn_cast<CXXMethodDecl>(D); | |||
2156 | if (MD && requiresMemberFunctionPointerTypeMetadata(*this, MD)) { | |||
2157 | for (const CXXRecordDecl *Base : getMostBaseClasses(MD->getParent())) { | |||
2158 | llvm::Metadata *Id = | |||
2159 | CreateMetadataIdentifierForType(Context.getMemberPointerType( | |||
2160 | MD->getType(), Context.getRecordType(Base).getTypePtr())); | |||
2161 | F->addTypeMetadata(0, Id); | |||
2162 | } | |||
2163 | } | |||
2164 | } | |||
2165 | ||||
2166 | void CodeGenModule::setLLVMFunctionFEnvAttributes(const FunctionDecl *D, | |||
2167 | llvm::Function *F) { | |||
2168 | if (D->hasAttr<StrictFPAttr>()) { | |||
2169 | llvm::AttrBuilder FuncAttrs(F->getContext()); | |||
2170 | FuncAttrs.addAttribute("strictfp"); | |||
2171 | F->addFnAttrs(FuncAttrs); | |||
2172 | } | |||
2173 | } | |||
2174 | ||||
2175 | void CodeGenModule::SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV) { | |||
2176 | const Decl *D = GD.getDecl(); | |||
2177 | if (isa_and_nonnull<NamedDecl>(D)) | |||
2178 | setGVProperties(GV, GD); | |||
2179 | else | |||
2180 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); | |||
2181 | ||||
2182 | if (D && D->hasAttr<UsedAttr>()) | |||
2183 | addUsedOrCompilerUsedGlobal(GV); | |||
2184 | ||||
2185 | if (CodeGenOpts.KeepStaticConsts && D && isa<VarDecl>(D)) { | |||
2186 | const auto *VD = cast<VarDecl>(D); | |||
2187 | if (VD->getType().isConstQualified() && | |||
2188 | VD->getStorageDuration() == SD_Static) | |||
2189 | addUsedOrCompilerUsedGlobal(GV); | |||
2190 | } | |||
2191 | } | |||
2192 | ||||
2193 | bool CodeGenModule::GetCPUAndFeaturesAttributes(GlobalDecl GD, | |||
2194 | llvm::AttrBuilder &Attrs) { | |||
2195 | // Add target-cpu and target-features attributes to functions. If | |||
2196 | // we have a decl for the function and it has a target attribute then | |||
2197 | // parse that and add it to the feature set. | |||
2198 | StringRef TargetCPU = getTarget().getTargetOpts().CPU; | |||
2199 | StringRef TuneCPU = getTarget().getTargetOpts().TuneCPU; | |||
2200 | std::vector<std::string> Features; | |||
2201 | const auto *FD = dyn_cast_or_null<FunctionDecl>(GD.getDecl()); | |||
2202 | FD = FD ? FD->getMostRecentDecl() : FD; | |||
2203 | const auto *TD = FD ? FD->getAttr<TargetAttr>() : nullptr; | |||
2204 | const auto *TV = FD ? FD->getAttr<TargetVersionAttr>() : nullptr; | |||
2205 | assert((!TD || !TV) && "both target_version and target specified")(static_cast <bool> ((!TD || !TV) && "both target_version and target specified" ) ? void (0) : __assert_fail ("(!TD || !TV) && \"both target_version and target specified\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2205, __extension__ __PRETTY_FUNCTION__ )); | |||
2206 | const auto *SD = FD ? FD->getAttr<CPUSpecificAttr>() : nullptr; | |||
2207 | const auto *TC = FD ? FD->getAttr<TargetClonesAttr>() : nullptr; | |||
2208 | bool AddedAttr = false; | |||
2209 | if (TD || TV || SD || TC) { | |||
2210 | llvm::StringMap<bool> FeatureMap; | |||
2211 | getContext().getFunctionFeatureMap(FeatureMap, GD); | |||
2212 | ||||
2213 | // Produce the canonical string for this set of features. | |||
2214 | for (const llvm::StringMap<bool>::value_type &Entry : FeatureMap) | |||
2215 | Features.push_back((Entry.getValue() ? "+" : "-") + Entry.getKey().str()); | |||
2216 | ||||
2217 | // Now add the target-cpu and target-features to the function. | |||
2218 | // While we populated the feature map above, we still need to | |||
2219 | // get and parse the target attribute so we can get the cpu for | |||
2220 | // the function. | |||
2221 | if (TD) { | |||
2222 | ParsedTargetAttr ParsedAttr = | |||
2223 | Target.parseTargetAttr(TD->getFeaturesStr()); | |||
2224 | if (!ParsedAttr.CPU.empty() && | |||
2225 | getTarget().isValidCPUName(ParsedAttr.CPU)) { | |||
2226 | TargetCPU = ParsedAttr.CPU; | |||
2227 | TuneCPU = ""; // Clear the tune CPU. | |||
2228 | } | |||
2229 | if (!ParsedAttr.Tune.empty() && | |||
2230 | getTarget().isValidCPUName(ParsedAttr.Tune)) | |||
2231 | TuneCPU = ParsedAttr.Tune; | |||
2232 | } | |||
2233 | ||||
2234 | if (SD) { | |||
2235 | // Apply the given CPU name as the 'tune-cpu' so that the optimizer can | |||
2236 | // favor this processor. | |||
2237 | TuneCPU = getTarget().getCPUSpecificTuneName( | |||
2238 | SD->getCPUName(GD.getMultiVersionIndex())->getName()); | |||
2239 | } | |||
2240 | } else { | |||
2241 | // Otherwise just add the existing target cpu and target features to the | |||
2242 | // function. | |||
2243 | Features = getTarget().getTargetOpts().Features; | |||
2244 | } | |||
2245 | ||||
2246 | if (!TargetCPU.empty()) { | |||
2247 | Attrs.addAttribute("target-cpu", TargetCPU); | |||
2248 | AddedAttr = true; | |||
2249 | } | |||
2250 | if (!TuneCPU.empty()) { | |||
2251 | Attrs.addAttribute("tune-cpu", TuneCPU); | |||
2252 | AddedAttr = true; | |||
2253 | } | |||
2254 | if (!Features.empty()) { | |||
2255 | llvm::sort(Features); | |||
2256 | Attrs.addAttribute("target-features", llvm::join(Features, ",")); | |||
2257 | AddedAttr = true; | |||
2258 | } | |||
2259 | ||||
2260 | return AddedAttr; | |||
2261 | } | |||
2262 | ||||
2263 | void CodeGenModule::setNonAliasAttributes(GlobalDecl GD, | |||
2264 | llvm::GlobalObject *GO) { | |||
2265 | const Decl *D = GD.getDecl(); | |||
2266 | SetCommonAttributes(GD, GO); | |||
2267 | ||||
2268 | if (D) { | |||
2269 | if (auto *GV = dyn_cast<llvm::GlobalVariable>(GO)) { | |||
2270 | if (D->hasAttr<RetainAttr>()) | |||
2271 | addUsedGlobal(GV); | |||
2272 | if (auto *SA = D->getAttr<PragmaClangBSSSectionAttr>()) | |||
2273 | GV->addAttribute("bss-section", SA->getName()); | |||
2274 | if (auto *SA = D->getAttr<PragmaClangDataSectionAttr>()) | |||
2275 | GV->addAttribute("data-section", SA->getName()); | |||
2276 | if (auto *SA = D->getAttr<PragmaClangRodataSectionAttr>()) | |||
2277 | GV->addAttribute("rodata-section", SA->getName()); | |||
2278 | if (auto *SA = D->getAttr<PragmaClangRelroSectionAttr>()) | |||
2279 | GV->addAttribute("relro-section", SA->getName()); | |||
2280 | } | |||
2281 | ||||
2282 | if (auto *F = dyn_cast<llvm::Function>(GO)) { | |||
2283 | if (D->hasAttr<RetainAttr>()) | |||
2284 | addUsedGlobal(F); | |||
2285 | if (auto *SA = D->getAttr<PragmaClangTextSectionAttr>()) | |||
2286 | if (!D->getAttr<SectionAttr>()) | |||
2287 | F->addFnAttr("implicit-section-name", SA->getName()); | |||
2288 | ||||
2289 | llvm::AttrBuilder Attrs(F->getContext()); | |||
2290 | if (GetCPUAndFeaturesAttributes(GD, Attrs)) { | |||
2291 | // We know that GetCPUAndFeaturesAttributes will always have the | |||
2292 | // newest set, since it has the newest possible FunctionDecl, so the | |||
2293 | // new ones should replace the old. | |||
2294 | llvm::AttributeMask RemoveAttrs; | |||
2295 | RemoveAttrs.addAttribute("target-cpu"); | |||
2296 | RemoveAttrs.addAttribute("target-features"); | |||
2297 | RemoveAttrs.addAttribute("tune-cpu"); | |||
2298 | F->removeFnAttrs(RemoveAttrs); | |||
2299 | F->addFnAttrs(Attrs); | |||
2300 | } | |||
2301 | } | |||
2302 | ||||
2303 | if (const auto *CSA = D->getAttr<CodeSegAttr>()) | |||
2304 | GO->setSection(CSA->getName()); | |||
2305 | else if (const auto *SA = D->getAttr<SectionAttr>()) | |||
2306 | GO->setSection(SA->getName()); | |||
2307 | } | |||
2308 | ||||
2309 | getTargetCodeGenInfo().setTargetAttributes(D, GO, *this); | |||
2310 | } | |||
2311 | ||||
2312 | void CodeGenModule::SetInternalFunctionAttributes(GlobalDecl GD, | |||
2313 | llvm::Function *F, | |||
2314 | const CGFunctionInfo &FI) { | |||
2315 | const Decl *D = GD.getDecl(); | |||
2316 | SetLLVMFunctionAttributes(GD, FI, F, /*IsThunk=*/false); | |||
2317 | SetLLVMFunctionAttributesForDefinition(D, F); | |||
2318 | ||||
2319 | F->setLinkage(llvm::Function::InternalLinkage); | |||
2320 | ||||
2321 | setNonAliasAttributes(GD, F); | |||
2322 | } | |||
2323 | ||||
2324 | static void setLinkageForGV(llvm::GlobalValue *GV, const NamedDecl *ND) { | |||
2325 | // Set linkage and visibility in case we never see a definition. | |||
2326 | LinkageInfo LV = ND->getLinkageAndVisibility(); | |||
2327 | // Don't set internal linkage on declarations. | |||
2328 | // "extern_weak" is overloaded in LLVM; we probably should have | |||
2329 | // separate linkage types for this. | |||
2330 | if (isExternallyVisible(LV.getLinkage()) && | |||
2331 | (ND->hasAttr<WeakAttr>() || ND->isWeakImported())) | |||
2332 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); | |||
2333 | } | |||
2334 | ||||
2335 | void CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD, | |||
2336 | llvm::Function *F) { | |||
2337 | // Only if we are checking indirect calls. | |||
2338 | if (!LangOpts.Sanitize.has(SanitizerKind::CFIICall)) | |||
2339 | return; | |||
2340 | ||||
2341 | // Non-static class methods are handled via vtable or member function pointer | |||
2342 | // checks elsewhere. | |||
2343 | if (isa<CXXMethodDecl>(FD) && !cast<CXXMethodDecl>(FD)->isStatic()) | |||
2344 | return; | |||
2345 | ||||
2346 | llvm::Metadata *MD = CreateMetadataIdentifierForType(FD->getType()); | |||
2347 | F->addTypeMetadata(0, MD); | |||
2348 | F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType())); | |||
2349 | ||||
2350 | // Emit a hash-based bit set entry for cross-DSO calls. | |||
2351 | if (CodeGenOpts.SanitizeCfiCrossDso) | |||
2352 | if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD)) | |||
2353 | F->addTypeMetadata(0, llvm::ConstantAsMetadata::get(CrossDsoTypeId)); | |||
2354 | } | |||
2355 | ||||
2356 | void CodeGenModule::setKCFIType(const FunctionDecl *FD, llvm::Function *F) { | |||
2357 | if (isa<CXXMethodDecl>(FD) && !cast<CXXMethodDecl>(FD)->isStatic()) | |||
2358 | return; | |||
2359 | ||||
2360 | llvm::LLVMContext &Ctx = F->getContext(); | |||
2361 | llvm::MDBuilder MDB(Ctx); | |||
2362 | F->setMetadata(llvm::LLVMContext::MD_kcfi_type, | |||
2363 | llvm::MDNode::get( | |||
2364 | Ctx, MDB.createConstant(CreateKCFITypeId(FD->getType())))); | |||
2365 | } | |||
2366 | ||||
2367 | static bool allowKCFIIdentifier(StringRef Name) { | |||
2368 | // KCFI type identifier constants are only necessary for external assembly | |||
2369 | // functions, which means it's safe to skip unusual names. Subset of | |||
2370 | // MCAsmInfo::isAcceptableChar() and MCAsmInfoXCOFF::isAcceptableChar(). | |||
2371 | return llvm::all_of(Name, [](const char &C) { | |||
2372 | return llvm::isAlnum(C) || C == '_' || C == '.'; | |||
2373 | }); | |||
2374 | } | |||
2375 | ||||
2376 | void CodeGenModule::finalizeKCFITypes() { | |||
2377 | llvm::Module &M = getModule(); | |||
2378 | for (auto &F : M.functions()) { | |||
2379 | // Remove KCFI type metadata from non-address-taken local functions. | |||
2380 | bool AddressTaken = F.hasAddressTaken(); | |||
2381 | if (!AddressTaken && F.hasLocalLinkage()) | |||
2382 | F.eraseMetadata(llvm::LLVMContext::MD_kcfi_type); | |||
2383 | ||||
2384 | // Generate a constant with the expected KCFI type identifier for all | |||
2385 | // address-taken function declarations to support annotating indirectly | |||
2386 | // called assembly functions. | |||
2387 | if (!AddressTaken || !F.isDeclaration()) | |||
2388 | continue; | |||
2389 | ||||
2390 | const llvm::ConstantInt *Type; | |||
2391 | if (const llvm::MDNode *MD = F.getMetadata(llvm::LLVMContext::MD_kcfi_type)) | |||
2392 | Type = llvm::mdconst::extract<llvm::ConstantInt>(MD->getOperand(0)); | |||
2393 | else | |||
2394 | continue; | |||
2395 | ||||
2396 | StringRef Name = F.getName(); | |||
2397 | if (!allowKCFIIdentifier(Name)) | |||
2398 | continue; | |||
2399 | ||||
2400 | std::string Asm = (".weak __kcfi_typeid_" + Name + "\n.set __kcfi_typeid_" + | |||
2401 | Name + ", " + Twine(Type->getZExtValue()) + "\n") | |||
2402 | .str(); | |||
2403 | M.appendModuleInlineAsm(Asm); | |||
2404 | } | |||
2405 | } | |||
2406 | ||||
2407 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, llvm::Function *F, | |||
2408 | bool IsIncompleteFunction, | |||
2409 | bool IsThunk) { | |||
2410 | ||||
2411 | if (llvm::Intrinsic::ID IID = F->getIntrinsicID()) { | |||
2412 | // If this is an intrinsic function, set the function's attributes | |||
2413 | // to the intrinsic's attributes. | |||
2414 | F->setAttributes(llvm::Intrinsic::getAttributes(getLLVMContext(), IID)); | |||
2415 | return; | |||
2416 | } | |||
2417 | ||||
2418 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
2419 | ||||
2420 | if (!IsIncompleteFunction) | |||
2421 | SetLLVMFunctionAttributes(GD, getTypes().arrangeGlobalDeclaration(GD), F, | |||
2422 | IsThunk); | |||
2423 | ||||
2424 | // Add the Returned attribute for "this", except for iOS 5 and earlier | |||
2425 | // where substantial code, including the libstdc++ dylib, was compiled with | |||
2426 | // GCC and does not actually return "this". | |||
2427 | if (!IsThunk && getCXXABI().HasThisReturn(GD) && | |||
2428 | !(getTriple().isiOS() && getTriple().isOSVersionLT(6))) { | |||
2429 | assert(!F->arg_empty() &&(static_cast <bool> (!F->arg_empty() && F-> arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType ()) && "unexpected this return") ? void (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2432, __extension__ __PRETTY_FUNCTION__ )) | |||
2430 | F->arg_begin()->getType()(static_cast <bool> (!F->arg_empty() && F-> arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType ()) && "unexpected this return") ? void (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2432, __extension__ __PRETTY_FUNCTION__ )) | |||
2431 | ->canLosslesslyBitCastTo(F->getReturnType()) &&(static_cast <bool> (!F->arg_empty() && F-> arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType ()) && "unexpected this return") ? void (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2432, __extension__ __PRETTY_FUNCTION__ )) | |||
2432 | "unexpected this return")(static_cast <bool> (!F->arg_empty() && F-> arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType ()) && "unexpected this return") ? void (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2432, __extension__ __PRETTY_FUNCTION__ )); | |||
2433 | F->addParamAttr(0, llvm::Attribute::Returned); | |||
2434 | } | |||
2435 | ||||
2436 | // Only a few attributes are set on declarations; these may later be | |||
2437 | // overridden by a definition. | |||
2438 | ||||
2439 | setLinkageForGV(F, FD); | |||
2440 | setGVProperties(F, FD); | |||
2441 | ||||
2442 | // Setup target-specific attributes. | |||
2443 | if (!IsIncompleteFunction && F->isDeclaration()) | |||
2444 | getTargetCodeGenInfo().setTargetAttributes(FD, F, *this); | |||
2445 | ||||
2446 | if (const auto *CSA = FD->getAttr<CodeSegAttr>()) | |||
2447 | F->setSection(CSA->getName()); | |||
2448 | else if (const auto *SA = FD->getAttr<SectionAttr>()) | |||
2449 | F->setSection(SA->getName()); | |||
2450 | ||||
2451 | if (const auto *EA = FD->getAttr<ErrorAttr>()) { | |||
2452 | if (EA->isError()) | |||
2453 | F->addFnAttr("dontcall-error", EA->getUserDiagnostic()); | |||
2454 | else if (EA->isWarning()) | |||
2455 | F->addFnAttr("dontcall-warn", EA->getUserDiagnostic()); | |||
2456 | } | |||
2457 | ||||
2458 | // If we plan on emitting this inline builtin, we can't treat it as a builtin. | |||
2459 | if (FD->isInlineBuiltinDeclaration()) { | |||
2460 | const FunctionDecl *FDBody; | |||
2461 | bool HasBody = FD->hasBody(FDBody); | |||
2462 | (void)HasBody; | |||
2463 | assert(HasBody && "Inline builtin declarations should always have an "(static_cast <bool> (HasBody && "Inline builtin declarations should always have an " "available body!") ? void (0) : __assert_fail ("HasBody && \"Inline builtin declarations should always have an \" \"available body!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2464, __extension__ __PRETTY_FUNCTION__ )) | |||
2464 | "available body!")(static_cast <bool> (HasBody && "Inline builtin declarations should always have an " "available body!") ? void (0) : __assert_fail ("HasBody && \"Inline builtin declarations should always have an \" \"available body!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2464, __extension__ __PRETTY_FUNCTION__ )); | |||
2465 | if (shouldEmitFunction(FDBody)) | |||
2466 | F->addFnAttr(llvm::Attribute::NoBuiltin); | |||
2467 | } | |||
2468 | ||||
2469 | if (FD->isReplaceableGlobalAllocationFunction()) { | |||
2470 | // A replaceable global allocation function does not act like a builtin by | |||
2471 | // default, only if it is invoked by a new-expression or delete-expression. | |||
2472 | F->addFnAttr(llvm::Attribute::NoBuiltin); | |||
2473 | } | |||
2474 | ||||
2475 | if (isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD)) | |||
2476 | F->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2477 | else if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) | |||
2478 | if (MD->isVirtual()) | |||
2479 | F->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2480 | ||||
2481 | // Don't emit entries for function declarations in the cross-DSO mode. This | |||
2482 | // is handled with better precision by the receiving DSO. But if jump tables | |||
2483 | // are non-canonical then we need type metadata in order to produce the local | |||
2484 | // jump table. | |||
2485 | if (!CodeGenOpts.SanitizeCfiCrossDso || | |||
2486 | !CodeGenOpts.SanitizeCfiCanonicalJumpTables) | |||
2487 | CreateFunctionTypeMetadataForIcall(FD, F); | |||
2488 | ||||
2489 | if (LangOpts.Sanitize.has(SanitizerKind::KCFI)) | |||
2490 | setKCFIType(FD, F); | |||
2491 | ||||
2492 | if (getLangOpts().OpenMP && FD->hasAttr<OMPDeclareSimdDeclAttr>()) | |||
2493 | getOpenMPRuntime().emitDeclareSimdFunction(FD, F); | |||
2494 | ||||
2495 | if (CodeGenOpts.InlineMaxStackSize != UINT_MAX(2147483647 *2U +1U)) | |||
2496 | F->addFnAttr("inline-max-stacksize", llvm::utostr(CodeGenOpts.InlineMaxStackSize)); | |||
2497 | ||||
2498 | if (const auto *CB = FD->getAttr<CallbackAttr>()) { | |||
2499 | // Annotate the callback behavior as metadata: | |||
2500 | // - The callback callee (as argument number). | |||
2501 | // - The callback payloads (as argument numbers). | |||
2502 | llvm::LLVMContext &Ctx = F->getContext(); | |||
2503 | llvm::MDBuilder MDB(Ctx); | |||
2504 | ||||
2505 | // The payload indices are all but the first one in the encoding. The first | |||
2506 | // identifies the callback callee. | |||
2507 | int CalleeIdx = *CB->encoding_begin(); | |||
2508 | ArrayRef<int> PayloadIndices(CB->encoding_begin() + 1, CB->encoding_end()); | |||
2509 | F->addMetadata(llvm::LLVMContext::MD_callback, | |||
2510 | *llvm::MDNode::get(Ctx, {MDB.createCallbackEncoding( | |||
2511 | CalleeIdx, PayloadIndices, | |||
2512 | /* VarArgsArePassed */ false)})); | |||
2513 | } | |||
2514 | } | |||
2515 | ||||
2516 | void CodeGenModule::addUsedGlobal(llvm::GlobalValue *GV) { | |||
2517 | assert((isa<llvm::Function>(GV) || !GV->isDeclaration()) &&(static_cast <bool> ((isa<llvm::Function>(GV) || ! GV->isDeclaration()) && "Only globals with definition can force usage." ) ? void (0) : __assert_fail ("(isa<llvm::Function>(GV) || !GV->isDeclaration()) && \"Only globals with definition can force usage.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2518, __extension__ __PRETTY_FUNCTION__ )) | |||
2518 | "Only globals with definition can force usage.")(static_cast <bool> ((isa<llvm::Function>(GV) || ! GV->isDeclaration()) && "Only globals with definition can force usage." ) ? void (0) : __assert_fail ("(isa<llvm::Function>(GV) || !GV->isDeclaration()) && \"Only globals with definition can force usage.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2518, __extension__ __PRETTY_FUNCTION__ )); | |||
2519 | LLVMUsed.emplace_back(GV); | |||
2520 | } | |||
2521 | ||||
2522 | void CodeGenModule::addCompilerUsedGlobal(llvm::GlobalValue *GV) { | |||
2523 | assert(!GV->isDeclaration() &&(static_cast <bool> (!GV->isDeclaration() && "Only globals with definition can force usage.") ? void (0) : __assert_fail ("!GV->isDeclaration() && \"Only globals with definition can force usage.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2524, __extension__ __PRETTY_FUNCTION__ )) | |||
2524 | "Only globals with definition can force usage.")(static_cast <bool> (!GV->isDeclaration() && "Only globals with definition can force usage.") ? void (0) : __assert_fail ("!GV->isDeclaration() && \"Only globals with definition can force usage.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2524, __extension__ __PRETTY_FUNCTION__ )); | |||
2525 | LLVMCompilerUsed.emplace_back(GV); | |||
2526 | } | |||
2527 | ||||
2528 | void CodeGenModule::addUsedOrCompilerUsedGlobal(llvm::GlobalValue *GV) { | |||
2529 | assert((isa<llvm::Function>(GV) || !GV->isDeclaration()) &&(static_cast <bool> ((isa<llvm::Function>(GV) || ! GV->isDeclaration()) && "Only globals with definition can force usage." ) ? void (0) : __assert_fail ("(isa<llvm::Function>(GV) || !GV->isDeclaration()) && \"Only globals with definition can force usage.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2530, __extension__ __PRETTY_FUNCTION__ )) | |||
2530 | "Only globals with definition can force usage.")(static_cast <bool> ((isa<llvm::Function>(GV) || ! GV->isDeclaration()) && "Only globals with definition can force usage." ) ? void (0) : __assert_fail ("(isa<llvm::Function>(GV) || !GV->isDeclaration()) && \"Only globals with definition can force usage.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2530, __extension__ __PRETTY_FUNCTION__ )); | |||
2531 | if (getTriple().isOSBinFormatELF()) | |||
2532 | LLVMCompilerUsed.emplace_back(GV); | |||
2533 | else | |||
2534 | LLVMUsed.emplace_back(GV); | |||
2535 | } | |||
2536 | ||||
2537 | static void emitUsed(CodeGenModule &CGM, StringRef Name, | |||
2538 | std::vector<llvm::WeakTrackingVH> &List) { | |||
2539 | // Don't create llvm.used if there is no need. | |||
2540 | if (List.empty()) | |||
2541 | return; | |||
2542 | ||||
2543 | // Convert List to what ConstantArray needs. | |||
2544 | SmallVector<llvm::Constant*, 8> UsedArray; | |||
2545 | UsedArray.resize(List.size()); | |||
2546 | for (unsigned i = 0, e = List.size(); i != e; ++i) { | |||
2547 | UsedArray[i] = | |||
2548 | llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
2549 | cast<llvm::Constant>(&*List[i]), CGM.Int8PtrTy); | |||
2550 | } | |||
2551 | ||||
2552 | if (UsedArray.empty()) | |||
2553 | return; | |||
2554 | llvm::ArrayType *ATy = llvm::ArrayType::get(CGM.Int8PtrTy, UsedArray.size()); | |||
2555 | ||||
2556 | auto *GV = new llvm::GlobalVariable( | |||
2557 | CGM.getModule(), ATy, false, llvm::GlobalValue::AppendingLinkage, | |||
2558 | llvm::ConstantArray::get(ATy, UsedArray), Name); | |||
2559 | ||||
2560 | GV->setSection("llvm.metadata"); | |||
2561 | } | |||
2562 | ||||
2563 | void CodeGenModule::emitLLVMUsed() { | |||
2564 | emitUsed(*this, "llvm.used", LLVMUsed); | |||
2565 | emitUsed(*this, "llvm.compiler.used", LLVMCompilerUsed); | |||
2566 | } | |||
2567 | ||||
2568 | void CodeGenModule::AppendLinkerOptions(StringRef Opts) { | |||
2569 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opts); | |||
2570 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); | |||
2571 | } | |||
2572 | ||||
2573 | void CodeGenModule::AddDetectMismatch(StringRef Name, StringRef Value) { | |||
2574 | llvm::SmallString<32> Opt; | |||
2575 | getTargetCodeGenInfo().getDetectMismatchOption(Name, Value, Opt); | |||
2576 | if (Opt.empty()) | |||
2577 | return; | |||
2578 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); | |||
2579 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); | |||
2580 | } | |||
2581 | ||||
2582 | void CodeGenModule::AddDependentLib(StringRef Lib) { | |||
2583 | auto &C = getLLVMContext(); | |||
2584 | if (getTarget().getTriple().isOSBinFormatELF()) { | |||
2585 | ELFDependentLibraries.push_back( | |||
2586 | llvm::MDNode::get(C, llvm::MDString::get(C, Lib))); | |||
2587 | return; | |||
2588 | } | |||
2589 | ||||
2590 | llvm::SmallString<24> Opt; | |||
2591 | getTargetCodeGenInfo().getDependentLibraryOption(Lib, Opt); | |||
2592 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); | |||
2593 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(C, MDOpts)); | |||
2594 | } | |||
2595 | ||||
2596 | /// Add link options implied by the given module, including modules | |||
2597 | /// it depends on, using a postorder walk. | |||
2598 | static void addLinkOptionsPostorder(CodeGenModule &CGM, Module *Mod, | |||
2599 | SmallVectorImpl<llvm::MDNode *> &Metadata, | |||
2600 | llvm::SmallPtrSet<Module *, 16> &Visited) { | |||
2601 | // Import this module's parent. | |||
2602 | if (Mod->Parent && Visited.insert(Mod->Parent).second) { | |||
2603 | addLinkOptionsPostorder(CGM, Mod->Parent, Metadata, Visited); | |||
2604 | } | |||
2605 | ||||
2606 | // Import this module's dependencies. | |||
2607 | for (Module *Import : llvm::reverse(Mod->Imports)) { | |||
2608 | if (Visited.insert(Import).second) | |||
2609 | addLinkOptionsPostorder(CGM, Import, Metadata, Visited); | |||
2610 | } | |||
2611 | ||||
2612 | // Add linker options to link against the libraries/frameworks | |||
2613 | // described by this module. | |||
2614 | llvm::LLVMContext &Context = CGM.getLLVMContext(); | |||
2615 | bool IsELF = CGM.getTarget().getTriple().isOSBinFormatELF(); | |||
2616 | ||||
2617 | // For modules that use export_as for linking, use that module | |||
2618 | // name instead. | |||
2619 | if (Mod->UseExportAsModuleLinkName) | |||
2620 | return; | |||
2621 | ||||
2622 | for (const Module::LinkLibrary &LL : llvm::reverse(Mod->LinkLibraries)) { | |||
2623 | // Link against a framework. Frameworks are currently Darwin only, so we | |||
2624 | // don't to ask TargetCodeGenInfo for the spelling of the linker option. | |||
2625 | if (LL.IsFramework) { | |||
2626 | llvm::Metadata *Args[2] = {llvm::MDString::get(Context, "-framework"), | |||
2627 | llvm::MDString::get(Context, LL.Library)}; | |||
2628 | ||||
2629 | Metadata.push_back(llvm::MDNode::get(Context, Args)); | |||
2630 | continue; | |||
2631 | } | |||
2632 | ||||
2633 | // Link against a library. | |||
2634 | if (IsELF) { | |||
2635 | llvm::Metadata *Args[2] = { | |||
2636 | llvm::MDString::get(Context, "lib"), | |||
2637 | llvm::MDString::get(Context, LL.Library), | |||
2638 | }; | |||
2639 | Metadata.push_back(llvm::MDNode::get(Context, Args)); | |||
2640 | } else { | |||
2641 | llvm::SmallString<24> Opt; | |||
2642 | CGM.getTargetCodeGenInfo().getDependentLibraryOption(LL.Library, Opt); | |||
2643 | auto *OptString = llvm::MDString::get(Context, Opt); | |||
2644 | Metadata.push_back(llvm::MDNode::get(Context, OptString)); | |||
2645 | } | |||
2646 | } | |||
2647 | } | |||
2648 | ||||
2649 | void CodeGenModule::EmitModuleInitializers(clang::Module *Primary) { | |||
2650 | // Emit the initializers in the order that sub-modules appear in the | |||
2651 | // source, first Global Module Fragments, if present. | |||
2652 | if (auto GMF = Primary->getGlobalModuleFragment()) { | |||
2653 | for (Decl *D : getContext().getModuleInitializers(GMF)) { | |||
2654 | if (isa<ImportDecl>(D)) | |||
2655 | continue; | |||
2656 | assert(isa<VarDecl>(D) && "GMF initializer decl is not a var?")(static_cast <bool> (isa<VarDecl>(D) && "GMF initializer decl is not a var?" ) ? void (0) : __assert_fail ("isa<VarDecl>(D) && \"GMF initializer decl is not a var?\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2656, __extension__ __PRETTY_FUNCTION__ )); | |||
2657 | EmitTopLevelDecl(D); | |||
2658 | } | |||
2659 | } | |||
2660 | // Second any associated with the module, itself. | |||
2661 | for (Decl *D : getContext().getModuleInitializers(Primary)) { | |||
2662 | // Skip import decls, the inits for those are called explicitly. | |||
2663 | if (isa<ImportDecl>(D)) | |||
2664 | continue; | |||
2665 | EmitTopLevelDecl(D); | |||
2666 | } | |||
2667 | // Third any associated with the Privat eMOdule Fragment, if present. | |||
2668 | if (auto PMF = Primary->getPrivateModuleFragment()) { | |||
2669 | for (Decl *D : getContext().getModuleInitializers(PMF)) { | |||
2670 | assert(isa<VarDecl>(D) && "PMF initializer decl is not a var?")(static_cast <bool> (isa<VarDecl>(D) && "PMF initializer decl is not a var?" ) ? void (0) : __assert_fail ("isa<VarDecl>(D) && \"PMF initializer decl is not a var?\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2670, __extension__ __PRETTY_FUNCTION__ )); | |||
2671 | EmitTopLevelDecl(D); | |||
2672 | } | |||
2673 | } | |||
2674 | } | |||
2675 | ||||
2676 | void CodeGenModule::EmitModuleLinkOptions() { | |||
2677 | // Collect the set of all of the modules we want to visit to emit link | |||
2678 | // options, which is essentially the imported modules and all of their | |||
2679 | // non-explicit child modules. | |||
2680 | llvm::SetVector<clang::Module *> LinkModules; | |||
2681 | llvm::SmallPtrSet<clang::Module *, 16> Visited; | |||
2682 | SmallVector<clang::Module *, 16> Stack; | |||
2683 | ||||
2684 | // Seed the stack with imported modules. | |||
2685 | for (Module *M : ImportedModules) { | |||
2686 | // Do not add any link flags when an implementation TU of a module imports | |||
2687 | // a header of that same module. | |||
2688 | if (M->getTopLevelModuleName() == getLangOpts().CurrentModule && | |||
2689 | !getLangOpts().isCompilingModule()) | |||
2690 | continue; | |||
2691 | if (Visited.insert(M).second) | |||
2692 | Stack.push_back(M); | |||
2693 | } | |||
2694 | ||||
2695 | // Find all of the modules to import, making a little effort to prune | |||
2696 | // non-leaf modules. | |||
2697 | while (!Stack.empty()) { | |||
2698 | clang::Module *Mod = Stack.pop_back_val(); | |||
2699 | ||||
2700 | bool AnyChildren = false; | |||
2701 | ||||
2702 | // Visit the submodules of this module. | |||
2703 | for (const auto &SM : Mod->submodules()) { | |||
2704 | // Skip explicit children; they need to be explicitly imported to be | |||
2705 | // linked against. | |||
2706 | if (SM->IsExplicit) | |||
2707 | continue; | |||
2708 | ||||
2709 | if (Visited.insert(SM).second) { | |||
2710 | Stack.push_back(SM); | |||
2711 | AnyChildren = true; | |||
2712 | } | |||
2713 | } | |||
2714 | ||||
2715 | // We didn't find any children, so add this module to the list of | |||
2716 | // modules to link against. | |||
2717 | if (!AnyChildren) { | |||
2718 | LinkModules.insert(Mod); | |||
2719 | } | |||
2720 | } | |||
2721 | ||||
2722 | // Add link options for all of the imported modules in reverse topological | |||
2723 | // order. We don't do anything to try to order import link flags with respect | |||
2724 | // to linker options inserted by things like #pragma comment(). | |||
2725 | SmallVector<llvm::MDNode *, 16> MetadataArgs; | |||
2726 | Visited.clear(); | |||
2727 | for (Module *M : LinkModules) | |||
2728 | if (Visited.insert(M).second) | |||
2729 | addLinkOptionsPostorder(*this, M, MetadataArgs, Visited); | |||
2730 | std::reverse(MetadataArgs.begin(), MetadataArgs.end()); | |||
2731 | LinkerOptionsMetadata.append(MetadataArgs.begin(), MetadataArgs.end()); | |||
2732 | ||||
2733 | // Add the linker options metadata flag. | |||
2734 | auto *NMD = getModule().getOrInsertNamedMetadata("llvm.linker.options"); | |||
2735 | for (auto *MD : LinkerOptionsMetadata) | |||
2736 | NMD->addOperand(MD); | |||
2737 | } | |||
2738 | ||||
2739 | void CodeGenModule::EmitDeferred() { | |||
2740 | // Emit deferred declare target declarations. | |||
2741 | if (getLangOpts().OpenMP && !getLangOpts().OpenMPSimd) | |||
2742 | getOpenMPRuntime().emitDeferredTargetDecls(); | |||
2743 | ||||
2744 | // Emit code for any potentially referenced deferred decls. Since a | |||
2745 | // previously unused static decl may become used during the generation of code | |||
2746 | // for a static function, iterate until no changes are made. | |||
2747 | ||||
2748 | if (!DeferredVTables.empty()) { | |||
2749 | EmitDeferredVTables(); | |||
2750 | ||||
2751 | // Emitting a vtable doesn't directly cause more vtables to | |||
2752 | // become deferred, although it can cause functions to be | |||
2753 | // emitted that then need those vtables. | |||
2754 | assert(DeferredVTables.empty())(static_cast <bool> (DeferredVTables.empty()) ? void (0 ) : __assert_fail ("DeferredVTables.empty()", "clang/lib/CodeGen/CodeGenModule.cpp" , 2754, __extension__ __PRETTY_FUNCTION__)); | |||
2755 | } | |||
2756 | ||||
2757 | // Emit CUDA/HIP static device variables referenced by host code only. | |||
2758 | // Note we should not clear CUDADeviceVarODRUsedByHost since it is still | |||
2759 | // needed for further handling. | |||
2760 | if (getLangOpts().CUDA && getLangOpts().CUDAIsDevice) | |||
2761 | llvm::append_range(DeferredDeclsToEmit, | |||
2762 | getContext().CUDADeviceVarODRUsedByHost); | |||
2763 | ||||
2764 | // Stop if we're out of both deferred vtables and deferred declarations. | |||
2765 | if (DeferredDeclsToEmit.empty()) | |||
2766 | return; | |||
2767 | ||||
2768 | // Grab the list of decls to emit. If EmitGlobalDefinition schedules more | |||
2769 | // work, it will not interfere with this. | |||
2770 | std::vector<GlobalDecl> CurDeclsToEmit; | |||
2771 | CurDeclsToEmit.swap(DeferredDeclsToEmit); | |||
2772 | ||||
2773 | for (GlobalDecl &D : CurDeclsToEmit) { | |||
2774 | // We should call GetAddrOfGlobal with IsForDefinition set to true in order | |||
2775 | // to get GlobalValue with exactly the type we need, not something that | |||
2776 | // might had been created for another decl with the same mangled name but | |||
2777 | // different type. | |||
2778 | llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>( | |||
2779 | GetAddrOfGlobal(D, ForDefinition)); | |||
2780 | ||||
2781 | // In case of different address spaces, we may still get a cast, even with | |||
2782 | // IsForDefinition equal to true. Query mangled names table to get | |||
2783 | // GlobalValue. | |||
2784 | if (!GV) | |||
2785 | GV = GetGlobalValue(getMangledName(D)); | |||
2786 | ||||
2787 | // Make sure GetGlobalValue returned non-null. | |||
2788 | assert(GV)(static_cast <bool> (GV) ? void (0) : __assert_fail ("GV" , "clang/lib/CodeGen/CodeGenModule.cpp", 2788, __extension__ __PRETTY_FUNCTION__ )); | |||
2789 | ||||
2790 | // Check to see if we've already emitted this. This is necessary | |||
2791 | // for a couple of reasons: first, decls can end up in the | |||
2792 | // deferred-decls queue multiple times, and second, decls can end | |||
2793 | // up with definitions in unusual ways (e.g. by an extern inline | |||
2794 | // function acquiring a strong function redefinition). Just | |||
2795 | // ignore these cases. | |||
2796 | if (!GV->isDeclaration()) | |||
2797 | continue; | |||
2798 | ||||
2799 | // If this is OpenMP, check if it is legal to emit this global normally. | |||
2800 | if (LangOpts.OpenMP && OpenMPRuntime && OpenMPRuntime->emitTargetGlobal(D)) | |||
2801 | continue; | |||
2802 | ||||
2803 | // Otherwise, emit the definition and move on to the next one. | |||
2804 | EmitGlobalDefinition(D, GV); | |||
2805 | ||||
2806 | // If we found out that we need to emit more decls, do that recursively. | |||
2807 | // This has the advantage that the decls are emitted in a DFS and related | |||
2808 | // ones are close together, which is convenient for testing. | |||
2809 | if (!DeferredVTables.empty() || !DeferredDeclsToEmit.empty()) { | |||
2810 | EmitDeferred(); | |||
2811 | assert(DeferredVTables.empty() && DeferredDeclsToEmit.empty())(static_cast <bool> (DeferredVTables.empty() && DeferredDeclsToEmit.empty()) ? void (0) : __assert_fail ("DeferredVTables.empty() && DeferredDeclsToEmit.empty()" , "clang/lib/CodeGen/CodeGenModule.cpp", 2811, __extension__ __PRETTY_FUNCTION__ )); | |||
2812 | } | |||
2813 | } | |||
2814 | } | |||
2815 | ||||
2816 | void CodeGenModule::EmitVTablesOpportunistically() { | |||
2817 | // Try to emit external vtables as available_externally if they have emitted | |||
2818 | // all inlined virtual functions. It runs after EmitDeferred() and therefore | |||
2819 | // is not allowed to create new references to things that need to be emitted | |||
2820 | // lazily. Note that it also uses fact that we eagerly emitting RTTI. | |||
2821 | ||||
2822 | assert((OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables())(static_cast <bool> ((OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables ()) && "Only emit opportunistic vtables with optimizations" ) ? void (0) : __assert_fail ("(OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables()) && \"Only emit opportunistic vtables with optimizations\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2823, __extension__ __PRETTY_FUNCTION__ )) | |||
2823 | && "Only emit opportunistic vtables with optimizations")(static_cast <bool> ((OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables ()) && "Only emit opportunistic vtables with optimizations" ) ? void (0) : __assert_fail ("(OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables()) && \"Only emit opportunistic vtables with optimizations\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2823, __extension__ __PRETTY_FUNCTION__ )); | |||
2824 | ||||
2825 | for (const CXXRecordDecl *RD : OpportunisticVTables) { | |||
2826 | assert(getVTables().isVTableExternal(RD) &&(static_cast <bool> (getVTables().isVTableExternal(RD) && "This queue should only contain external vtables") ? void (0 ) : __assert_fail ("getVTables().isVTableExternal(RD) && \"This queue should only contain external vtables\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2827, __extension__ __PRETTY_FUNCTION__ )) | |||
2827 | "This queue should only contain external vtables")(static_cast <bool> (getVTables().isVTableExternal(RD) && "This queue should only contain external vtables") ? void (0 ) : __assert_fail ("getVTables().isVTableExternal(RD) && \"This queue should only contain external vtables\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2827, __extension__ __PRETTY_FUNCTION__ )); | |||
2828 | if (getCXXABI().canSpeculativelyEmitVTable(RD)) | |||
2829 | VTables.GenerateClassData(RD); | |||
2830 | } | |||
2831 | OpportunisticVTables.clear(); | |||
2832 | } | |||
2833 | ||||
2834 | void CodeGenModule::EmitGlobalAnnotations() { | |||
2835 | if (Annotations.empty()) | |||
2836 | return; | |||
2837 | ||||
2838 | // Create a new global variable for the ConstantStruct in the Module. | |||
2839 | llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( | |||
2840 | Annotations[0]->getType(), Annotations.size()), Annotations); | |||
2841 | auto *gv = new llvm::GlobalVariable(getModule(), Array->getType(), false, | |||
2842 | llvm::GlobalValue::AppendingLinkage, | |||
2843 | Array, "llvm.global.annotations"); | |||
2844 | gv->setSection(AnnotationSection); | |||
2845 | } | |||
2846 | ||||
2847 | llvm::Constant *CodeGenModule::EmitAnnotationString(StringRef Str) { | |||
2848 | llvm::Constant *&AStr = AnnotationStrings[Str]; | |||
2849 | if (AStr) | |||
2850 | return AStr; | |||
2851 | ||||
2852 | // Not found yet, create a new global. | |||
2853 | llvm::Constant *s = llvm::ConstantDataArray::getString(getLLVMContext(), Str); | |||
2854 | auto *gv = new llvm::GlobalVariable( | |||
2855 | getModule(), s->getType(), true, llvm::GlobalValue::PrivateLinkage, s, | |||
2856 | ".str", nullptr, llvm::GlobalValue::NotThreadLocal, | |||
2857 | ConstGlobalsPtrTy->getAddressSpace()); | |||
2858 | gv->setSection(AnnotationSection); | |||
2859 | gv->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2860 | AStr = gv; | |||
2861 | return gv; | |||
2862 | } | |||
2863 | ||||
2864 | llvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { | |||
2865 | SourceManager &SM = getContext().getSourceManager(); | |||
2866 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); | |||
2867 | if (PLoc.isValid()) | |||
2868 | return EmitAnnotationString(PLoc.getFilename()); | |||
2869 | return EmitAnnotationString(SM.getBufferName(Loc)); | |||
2870 | } | |||
2871 | ||||
2872 | llvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { | |||
2873 | SourceManager &SM = getContext().getSourceManager(); | |||
2874 | PresumedLoc PLoc = SM.getPresumedLoc(L); | |||
2875 | unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : | |||
2876 | SM.getExpansionLineNumber(L); | |||
2877 | return llvm::ConstantInt::get(Int32Ty, LineNo); | |||
2878 | } | |||
2879 | ||||
2880 | llvm::Constant *CodeGenModule::EmitAnnotationArgs(const AnnotateAttr *Attr) { | |||
2881 | ArrayRef<Expr *> Exprs = {Attr->args_begin(), Attr->args_size()}; | |||
2882 | if (Exprs.empty()) | |||
2883 | return llvm::ConstantPointerNull::get(ConstGlobalsPtrTy); | |||
2884 | ||||
2885 | llvm::FoldingSetNodeID ID; | |||
2886 | for (Expr *E : Exprs) { | |||
2887 | ID.Add(cast<clang::ConstantExpr>(E)->getAPValueResult()); | |||
2888 | } | |||
2889 | llvm::Constant *&Lookup = AnnotationArgs[ID.ComputeHash()]; | |||
2890 | if (Lookup) | |||
2891 | return Lookup; | |||
2892 | ||||
2893 | llvm::SmallVector<llvm::Constant *, 4> LLVMArgs; | |||
2894 | LLVMArgs.reserve(Exprs.size()); | |||
2895 | ConstantEmitter ConstEmiter(*this); | |||
2896 | llvm::transform(Exprs, std::back_inserter(LLVMArgs), [&](const Expr *E) { | |||
2897 | const auto *CE = cast<clang::ConstantExpr>(E); | |||
2898 | return ConstEmiter.emitAbstract(CE->getBeginLoc(), CE->getAPValueResult(), | |||
2899 | CE->getType()); | |||
2900 | }); | |||
2901 | auto *Struct = llvm::ConstantStruct::getAnon(LLVMArgs); | |||
2902 | auto *GV = new llvm::GlobalVariable(getModule(), Struct->getType(), true, | |||
2903 | llvm::GlobalValue::PrivateLinkage, Struct, | |||
2904 | ".args"); | |||
2905 | GV->setSection(AnnotationSection); | |||
2906 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2907 | auto *Bitcasted = llvm::ConstantExpr::getBitCast(GV, GlobalsInt8PtrTy); | |||
2908 | ||||
2909 | Lookup = Bitcasted; | |||
2910 | return Bitcasted; | |||
2911 | } | |||
2912 | ||||
2913 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, | |||
2914 | const AnnotateAttr *AA, | |||
2915 | SourceLocation L) { | |||
2916 | // Get the globals for file name, annotation, and the line number. | |||
2917 | llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), | |||
2918 | *UnitGV = EmitAnnotationUnit(L), | |||
2919 | *LineNoCst = EmitAnnotationLineNo(L), | |||
2920 | *Args = EmitAnnotationArgs(AA); | |||
2921 | ||||
2922 | llvm::Constant *GVInGlobalsAS = GV; | |||
2923 | if (GV->getAddressSpace() != | |||
2924 | getDataLayout().getDefaultGlobalsAddressSpace()) { | |||
2925 | GVInGlobalsAS = llvm::ConstantExpr::getAddrSpaceCast( | |||
2926 | GV, GV->getValueType()->getPointerTo( | |||
2927 | getDataLayout().getDefaultGlobalsAddressSpace())); | |||
2928 | } | |||
2929 | ||||
2930 | // Create the ConstantStruct for the global annotation. | |||
2931 | llvm::Constant *Fields[] = { | |||
2932 | llvm::ConstantExpr::getBitCast(GVInGlobalsAS, GlobalsInt8PtrTy), | |||
2933 | llvm::ConstantExpr::getBitCast(AnnoGV, ConstGlobalsPtrTy), | |||
2934 | llvm::ConstantExpr::getBitCast(UnitGV, ConstGlobalsPtrTy), | |||
2935 | LineNoCst, | |||
2936 | Args, | |||
2937 | }; | |||
2938 | return llvm::ConstantStruct::getAnon(Fields); | |||
2939 | } | |||
2940 | ||||
2941 | void CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, | |||
2942 | llvm::GlobalValue *GV) { | |||
2943 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute")(static_cast <bool> (D->hasAttr<AnnotateAttr>( ) && "no annotate attribute") ? void (0) : __assert_fail ("D->hasAttr<AnnotateAttr>() && \"no annotate attribute\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 2943, __extension__ __PRETTY_FUNCTION__ )); | |||
2944 | // Get the struct elements for these annotations. | |||
2945 | for (const auto *I : D->specific_attrs<AnnotateAttr>()) | |||
2946 | Annotations.push_back(EmitAnnotateAttr(GV, I, D->getLocation())); | |||
2947 | } | |||
2948 | ||||
2949 | bool CodeGenModule::isInNoSanitizeList(SanitizerMask Kind, llvm::Function *Fn, | |||
2950 | SourceLocation Loc) const { | |||
2951 | const auto &NoSanitizeL = getContext().getNoSanitizeList(); | |||
2952 | // NoSanitize by function name. | |||
2953 | if (NoSanitizeL.containsFunction(Kind, Fn->getName())) | |||
2954 | return true; | |||
2955 | // NoSanitize by location. Check "mainfile" prefix. | |||
2956 | auto &SM = Context.getSourceManager(); | |||
2957 | const FileEntry &MainFile = *SM.getFileEntryForID(SM.getMainFileID()); | |||
2958 | if (NoSanitizeL.containsMainFile(Kind, MainFile.getName())) | |||
2959 | return true; | |||
2960 | ||||
2961 | // Check "src" prefix. | |||
2962 | if (Loc.isValid()) | |||
2963 | return NoSanitizeL.containsLocation(Kind, Loc); | |||
2964 | // If location is unknown, this may be a compiler-generated function. Assume | |||
2965 | // it's located in the main file. | |||
2966 | return NoSanitizeL.containsFile(Kind, MainFile.getName()); | |||
2967 | } | |||
2968 | ||||
2969 | bool CodeGenModule::isInNoSanitizeList(SanitizerMask Kind, | |||
2970 | llvm::GlobalVariable *GV, | |||
2971 | SourceLocation Loc, QualType Ty, | |||
2972 | StringRef Category) const { | |||
2973 | const auto &NoSanitizeL = getContext().getNoSanitizeList(); | |||
2974 | if (NoSanitizeL.containsGlobal(Kind, GV->getName(), Category)) | |||
2975 | return true; | |||
2976 | auto &SM = Context.getSourceManager(); | |||
2977 | if (NoSanitizeL.containsMainFile( | |||
2978 | Kind, SM.getFileEntryForID(SM.getMainFileID())->getName(), Category)) | |||
2979 | return true; | |||
2980 | if (NoSanitizeL.containsLocation(Kind, Loc, Category)) | |||
2981 | return true; | |||
2982 | ||||
2983 | // Check global type. | |||
2984 | if (!Ty.isNull()) { | |||
2985 | // Drill down the array types: if global variable of a fixed type is | |||
2986 | // not sanitized, we also don't instrument arrays of them. | |||
2987 | while (auto AT = dyn_cast<ArrayType>(Ty.getTypePtr())) | |||
2988 | Ty = AT->getElementType(); | |||
2989 | Ty = Ty.getCanonicalType().getUnqualifiedType(); | |||
2990 | // Only record types (classes, structs etc.) are ignored. | |||
2991 | if (Ty->isRecordType()) { | |||
2992 | std::string TypeStr = Ty.getAsString(getContext().getPrintingPolicy()); | |||
2993 | if (NoSanitizeL.containsType(Kind, TypeStr, Category)) | |||
2994 | return true; | |||
2995 | } | |||
2996 | } | |||
2997 | return false; | |||
2998 | } | |||
2999 | ||||
3000 | bool CodeGenModule::imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, | |||
3001 | StringRef Category) const { | |||
3002 | const auto &XRayFilter = getContext().getXRayFilter(); | |||
3003 | using ImbueAttr = XRayFunctionFilter::ImbueAttribute; | |||
3004 | auto Attr = ImbueAttr::NONE; | |||
3005 | if (Loc.isValid()) | |||
3006 | Attr = XRayFilter.shouldImbueLocation(Loc, Category); | |||
3007 | if (Attr == ImbueAttr::NONE) | |||
3008 | Attr = XRayFilter.shouldImbueFunction(Fn->getName()); | |||
3009 | switch (Attr) { | |||
3010 | case ImbueAttr::NONE: | |||
3011 | return false; | |||
3012 | case ImbueAttr::ALWAYS: | |||
3013 | Fn->addFnAttr("function-instrument", "xray-always"); | |||
3014 | break; | |||
3015 | case ImbueAttr::ALWAYS_ARG1: | |||
3016 | Fn->addFnAttr("function-instrument", "xray-always"); | |||
3017 | Fn->addFnAttr("xray-log-args", "1"); | |||
3018 | break; | |||
3019 | case ImbueAttr::NEVER: | |||
3020 | Fn->addFnAttr("function-instrument", "xray-never"); | |||
3021 | break; | |||
3022 | } | |||
3023 | return true; | |||
3024 | } | |||
3025 | ||||
3026 | ProfileList::ExclusionType | |||
3027 | CodeGenModule::isFunctionBlockedByProfileList(llvm::Function *Fn, | |||
3028 | SourceLocation Loc) const { | |||
3029 | const auto &ProfileList = getContext().getProfileList(); | |||
3030 | // If the profile list is empty, then instrument everything. | |||
3031 | if (ProfileList.isEmpty()) | |||
3032 | return ProfileList::Allow; | |||
3033 | CodeGenOptions::ProfileInstrKind Kind = getCodeGenOpts().getProfileInstr(); | |||
3034 | // First, check the function name. | |||
3035 | if (auto V = ProfileList.isFunctionExcluded(Fn->getName(), Kind)) | |||
3036 | return *V; | |||
3037 | // Next, check the source location. | |||
3038 | if (Loc.isValid()) | |||
3039 | if (auto V = ProfileList.isLocationExcluded(Loc, Kind)) | |||
3040 | return *V; | |||
3041 | // If location is unknown, this may be a compiler-generated function. Assume | |||
3042 | // it's located in the main file. | |||
3043 | auto &SM = Context.getSourceManager(); | |||
3044 | if (const auto *MainFile = SM.getFileEntryForID(SM.getMainFileID())) | |||
3045 | if (auto V = ProfileList.isFileExcluded(MainFile->getName(), Kind)) | |||
3046 | return *V; | |||
3047 | return ProfileList.getDefault(Kind); | |||
3048 | } | |||
3049 | ||||
3050 | ProfileList::ExclusionType | |||
3051 | CodeGenModule::isFunctionBlockedFromProfileInstr(llvm::Function *Fn, | |||
3052 | SourceLocation Loc) const { | |||
3053 | auto V = isFunctionBlockedByProfileList(Fn, Loc); | |||
3054 | if (V != ProfileList::Allow) | |||
3055 | return V; | |||
3056 | ||||
3057 | auto NumGroups = getCodeGenOpts().ProfileTotalFunctionGroups; | |||
3058 | if (NumGroups > 1) { | |||
3059 | auto Group = llvm::crc32(arrayRefFromStringRef(Fn->getName())) % NumGroups; | |||
3060 | if (Group != getCodeGenOpts().ProfileSelectedFunctionGroup) | |||
3061 | return ProfileList::Skip; | |||
3062 | } | |||
3063 | return ProfileList::Allow; | |||
3064 | } | |||
3065 | ||||
3066 | bool CodeGenModule::MustBeEmitted(const ValueDecl *Global) { | |||
3067 | // Never defer when EmitAllDecls is specified. | |||
3068 | if (LangOpts.EmitAllDecls) | |||
3069 | return true; | |||
3070 | ||||
3071 | if (CodeGenOpts.KeepStaticConsts) { | |||
3072 | const auto *VD = dyn_cast<VarDecl>(Global); | |||
3073 | if (VD && VD->getType().isConstQualified() && | |||
3074 | VD->getStorageDuration() == SD_Static) | |||
3075 | return true; | |||
3076 | } | |||
3077 | ||||
3078 | return getContext().DeclMustBeEmitted(Global); | |||
3079 | } | |||
3080 | ||||
3081 | bool CodeGenModule::MayBeEmittedEagerly(const ValueDecl *Global) { | |||
3082 | // In OpenMP 5.0 variables and function may be marked as | |||
3083 | // device_type(host/nohost) and we should not emit them eagerly unless we sure | |||
3084 | // that they must be emitted on the host/device. To be sure we need to have | |||
3085 | // seen a declare target with an explicit mentioning of the function, we know | |||
3086 | // we have if the level of the declare target attribute is -1. Note that we | |||
3087 | // check somewhere else if we should emit this at all. | |||
3088 | if (LangOpts.OpenMP >= 50 && !LangOpts.OpenMPSimd) { | |||
3089 | std::optional<OMPDeclareTargetDeclAttr *> ActiveAttr = | |||
3090 | OMPDeclareTargetDeclAttr::getActiveAttr(Global); | |||
3091 | if (!ActiveAttr || (*ActiveAttr)->getLevel() != (unsigned)-1) | |||
3092 | return false; | |||
3093 | } | |||
3094 | ||||
3095 | if (const auto *FD = dyn_cast<FunctionDecl>(Global)) { | |||
3096 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | |||
3097 | // Implicit template instantiations may change linkage if they are later | |||
3098 | // explicitly instantiated, so they should not be emitted eagerly. | |||
3099 | return false; | |||
3100 | } | |||
3101 | if (const auto *VD = dyn_cast<VarDecl>(Global)) { | |||
3102 | if (Context.getInlineVariableDefinitionKind(VD) == | |||
3103 | ASTContext::InlineVariableDefinitionKind::WeakUnknown) | |||
3104 | // A definition of an inline constexpr static data member may change | |||
3105 | // linkage later if it's redeclared outside the class. | |||
3106 | return false; | |||
3107 | if (CXX20ModuleInits && VD->getOwningModule() && | |||
3108 | !VD->getOwningModule()->isModuleMapModule()) { | |||
3109 | // For CXX20, module-owned initializers need to be deferred, since it is | |||
3110 | // not known at this point if they will be run for the current module or | |||
3111 | // as part of the initializer for an imported one. | |||
3112 | return false; | |||
3113 | } | |||
3114 | } | |||
3115 | // If OpenMP is enabled and threadprivates must be generated like TLS, delay | |||
3116 | // codegen for global variables, because they may be marked as threadprivate. | |||
3117 | if (LangOpts.OpenMP && LangOpts.OpenMPUseTLS && | |||
3118 | getContext().getTargetInfo().isTLSSupported() && isa<VarDecl>(Global) && | |||
3119 | !isTypeConstant(Global->getType(), false) && | |||
3120 | !OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Global)) | |||
3121 | return false; | |||
3122 | ||||
3123 | return true; | |||
3124 | } | |||
3125 | ||||
3126 | ConstantAddress CodeGenModule::GetAddrOfMSGuidDecl(const MSGuidDecl *GD) { | |||
3127 | StringRef Name = getMangledName(GD); | |||
3128 | ||||
3129 | // The UUID descriptor should be pointer aligned. | |||
3130 | CharUnits Alignment = CharUnits::fromQuantity(PointerAlignInBytes); | |||
3131 | ||||
3132 | // Look for an existing global. | |||
3133 | if (llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name)) | |||
3134 | return ConstantAddress(GV, GV->getValueType(), Alignment); | |||
3135 | ||||
3136 | ConstantEmitter Emitter(*this); | |||
3137 | llvm::Constant *Init; | |||
3138 | ||||
3139 | APValue &V = GD->getAsAPValue(); | |||
3140 | if (!V.isAbsent()) { | |||
3141 | // If possible, emit the APValue version of the initializer. In particular, | |||
3142 | // this gets the type of the constant right. | |||
3143 | Init = Emitter.emitForInitializer( | |||
3144 | GD->getAsAPValue(), GD->getType().getAddressSpace(), GD->getType()); | |||
3145 | } else { | |||
3146 | // As a fallback, directly construct the constant. | |||
3147 | // FIXME: This may get padding wrong under esoteric struct layout rules. | |||
3148 | // MSVC appears to create a complete type 'struct __s_GUID' that it | |||
3149 | // presumably uses to represent these constants. | |||
3150 | MSGuidDecl::Parts Parts = GD->getParts(); | |||
3151 | llvm::Constant *Fields[4] = { | |||
3152 | llvm::ConstantInt::get(Int32Ty, Parts.Part1), | |||
3153 | llvm::ConstantInt::get(Int16Ty, Parts.Part2), | |||
3154 | llvm::ConstantInt::get(Int16Ty, Parts.Part3), | |||
3155 | llvm::ConstantDataArray::getRaw( | |||
3156 | StringRef(reinterpret_cast<char *>(Parts.Part4And5), 8), 8, | |||
3157 | Int8Ty)}; | |||
3158 | Init = llvm::ConstantStruct::getAnon(Fields); | |||
3159 | } | |||
3160 | ||||
3161 | auto *GV = new llvm::GlobalVariable( | |||
3162 | getModule(), Init->getType(), | |||
3163 | /*isConstant=*/true, llvm::GlobalValue::LinkOnceODRLinkage, Init, Name); | |||
3164 | if (supportsCOMDAT()) | |||
3165 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
3166 | setDSOLocal(GV); | |||
3167 | ||||
3168 | if (!V.isAbsent()) { | |||
3169 | Emitter.finalize(GV); | |||
3170 | return ConstantAddress(GV, GV->getValueType(), Alignment); | |||
3171 | } | |||
3172 | ||||
3173 | llvm::Type *Ty = getTypes().ConvertTypeForMem(GD->getType()); | |||
3174 | llvm::Constant *Addr = llvm::ConstantExpr::getBitCast( | |||
3175 | GV, Ty->getPointerTo(GV->getAddressSpace())); | |||
3176 | return ConstantAddress(Addr, Ty, Alignment); | |||
3177 | } | |||
3178 | ||||
3179 | ConstantAddress CodeGenModule::GetAddrOfUnnamedGlobalConstantDecl( | |||
3180 | const UnnamedGlobalConstantDecl *GCD) { | |||
3181 | CharUnits Alignment = getContext().getTypeAlignInChars(GCD->getType()); | |||
3182 | ||||
3183 | llvm::GlobalVariable **Entry = nullptr; | |||
3184 | Entry = &UnnamedGlobalConstantDeclMap[GCD]; | |||
3185 | if (*Entry) | |||
3186 | return ConstantAddress(*Entry, (*Entry)->getValueType(), Alignment); | |||
3187 | ||||
3188 | ConstantEmitter Emitter(*this); | |||
3189 | llvm::Constant *Init; | |||
3190 | ||||
3191 | const APValue &V = GCD->getValue(); | |||
3192 | ||||
3193 | assert(!V.isAbsent())(static_cast <bool> (!V.isAbsent()) ? void (0) : __assert_fail ("!V.isAbsent()", "clang/lib/CodeGen/CodeGenModule.cpp", 3193 , __extension__ __PRETTY_FUNCTION__)); | |||
3194 | Init = Emitter.emitForInitializer(V, GCD->getType().getAddressSpace(), | |||
3195 | GCD->getType()); | |||
3196 | ||||
3197 | auto *GV = new llvm::GlobalVariable(getModule(), Init->getType(), | |||
3198 | /*isConstant=*/true, | |||
3199 | llvm::GlobalValue::PrivateLinkage, Init, | |||
3200 | ".constant"); | |||
3201 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
3202 | GV->setAlignment(Alignment.getAsAlign()); | |||
3203 | ||||
3204 | Emitter.finalize(GV); | |||
3205 | ||||
3206 | *Entry = GV; | |||
3207 | return ConstantAddress(GV, GV->getValueType(), Alignment); | |||
3208 | } | |||
3209 | ||||
3210 | ConstantAddress CodeGenModule::GetAddrOfTemplateParamObject( | |||
3211 | const TemplateParamObjectDecl *TPO) { | |||
3212 | StringRef Name = getMangledName(TPO); | |||
3213 | CharUnits Alignment = getNaturalTypeAlignment(TPO->getType()); | |||
3214 | ||||
3215 | if (llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name)) | |||
3216 | return ConstantAddress(GV, GV->getValueType(), Alignment); | |||
3217 | ||||
3218 | ConstantEmitter Emitter(*this); | |||
3219 | llvm::Constant *Init = Emitter.emitForInitializer( | |||
3220 | TPO->getValue(), TPO->getType().getAddressSpace(), TPO->getType()); | |||
3221 | ||||
3222 | if (!Init) { | |||
3223 | ErrorUnsupported(TPO, "template parameter object"); | |||
3224 | return ConstantAddress::invalid(); | |||
3225 | } | |||
3226 | ||||
3227 | auto *GV = new llvm::GlobalVariable( | |||
3228 | getModule(), Init->getType(), | |||
3229 | /*isConstant=*/true, llvm::GlobalValue::LinkOnceODRLinkage, Init, Name); | |||
3230 | if (supportsCOMDAT()) | |||
3231 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
3232 | Emitter.finalize(GV); | |||
3233 | ||||
3234 | return ConstantAddress(GV, GV->getValueType(), Alignment); | |||
3235 | } | |||
3236 | ||||
3237 | ConstantAddress CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { | |||
3238 | const AliasAttr *AA = VD->getAttr<AliasAttr>(); | |||
3239 | assert(AA && "No alias?")(static_cast <bool> (AA && "No alias?") ? void ( 0) : __assert_fail ("AA && \"No alias?\"", "clang/lib/CodeGen/CodeGenModule.cpp" , 3239, __extension__ __PRETTY_FUNCTION__)); | |||
3240 | ||||
3241 | CharUnits Alignment = getContext().getDeclAlign(VD); | |||
3242 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); | |||
3243 | ||||
3244 | // See if there is already something with the target's name in the module. | |||
3245 | llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); | |||
3246 | if (Entry) { | |||
3247 | unsigned AS = getTypes().getTargetAddressSpace(VD->getType()); | |||
3248 | auto Ptr = llvm::ConstantExpr::getBitCast(Entry, DeclTy->getPointerTo(AS)); | |||
3249 | return ConstantAddress(Ptr, DeclTy, Alignment); | |||
3250 | } | |||
3251 | ||||
3252 | llvm::Constant *Aliasee; | |||
3253 | if (isa<llvm::FunctionType>(DeclTy)) | |||
3254 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, | |||
3255 | GlobalDecl(cast<FunctionDecl>(VD)), | |||
3256 | /*ForVTable=*/false); | |||
3257 | else | |||
3258 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), DeclTy, LangAS::Default, | |||
3259 | nullptr); | |||
3260 | ||||
3261 | auto *F = cast<llvm::GlobalValue>(Aliasee); | |||
3262 | F->setLinkage(llvm::Function::ExternalWeakLinkage); | |||
3263 | WeakRefReferences.insert(F); | |||
3264 | ||||
3265 | return ConstantAddress(Aliasee, DeclTy, Alignment); | |||
3266 | } | |||
3267 | ||||
3268 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { | |||
3269 | const auto *Global = cast<ValueDecl>(GD.getDecl()); | |||
3270 | ||||
3271 | // Weak references don't produce any output by themselves. | |||
3272 | if (Global->hasAttr<WeakRefAttr>()) | |||
3273 | return; | |||
3274 | ||||
3275 | // If this is an alias definition (which otherwise looks like a declaration) | |||
3276 | // emit it now. | |||
3277 | if (Global->hasAttr<AliasAttr>()) | |||
3278 | return EmitAliasDefinition(GD); | |||
3279 | ||||
3280 | // IFunc like an alias whose value is resolved at runtime by calling resolver. | |||
3281 | if (Global->hasAttr<IFuncAttr>()) | |||
3282 | return emitIFuncDefinition(GD); | |||
3283 | ||||
3284 | // If this is a cpu_dispatch multiversion function, emit the resolver. | |||
3285 | if (Global->hasAttr<CPUDispatchAttr>()) | |||
3286 | return emitCPUDispatchDefinition(GD); | |||
3287 | ||||
3288 | // If this is CUDA, be selective about which declarations we emit. | |||
3289 | if (LangOpts.CUDA) { | |||
3290 | if (LangOpts.CUDAIsDevice) { | |||
3291 | if (!Global->hasAttr<CUDADeviceAttr>() && | |||
3292 | !Global->hasAttr<CUDAGlobalAttr>() && | |||
3293 | !Global->hasAttr<CUDAConstantAttr>() && | |||
3294 | !Global->hasAttr<CUDASharedAttr>() && | |||
3295 | !Global->getType()->isCUDADeviceBuiltinSurfaceType() && | |||
3296 | !Global->getType()->isCUDADeviceBuiltinTextureType()) | |||
3297 | return; | |||
3298 | } else { | |||
3299 | // We need to emit host-side 'shadows' for all global | |||
3300 | // device-side variables because the CUDA runtime needs their | |||
3301 | // size and host-side address in order to provide access to | |||
3302 | // their device-side incarnations. | |||
3303 | ||||
3304 | // So device-only functions are the only things we skip. | |||
3305 | if (isa<FunctionDecl>(Global) && !Global->hasAttr<CUDAHostAttr>() && | |||
3306 | Global->hasAttr<CUDADeviceAttr>()) | |||
3307 | return; | |||
3308 | ||||
3309 | assert((isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) &&(static_cast <bool> ((isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) && "Expected Variable or Function" ) ? void (0) : __assert_fail ("(isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) && \"Expected Variable or Function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3310, __extension__ __PRETTY_FUNCTION__ )) | |||
3310 | "Expected Variable or Function")(static_cast <bool> ((isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) && "Expected Variable or Function" ) ? void (0) : __assert_fail ("(isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) && \"Expected Variable or Function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3310, __extension__ __PRETTY_FUNCTION__ )); | |||
3311 | } | |||
3312 | } | |||
3313 | ||||
3314 | if (LangOpts.OpenMP) { | |||
3315 | // If this is OpenMP, check if it is legal to emit this global normally. | |||
3316 | if (OpenMPRuntime && OpenMPRuntime->emitTargetGlobal(GD)) | |||
3317 | return; | |||
3318 | if (auto *DRD = dyn_cast<OMPDeclareReductionDecl>(Global)) { | |||
3319 | if (MustBeEmitted(Global)) | |||
3320 | EmitOMPDeclareReduction(DRD); | |||
3321 | return; | |||
3322 | } | |||
3323 | if (auto *DMD = dyn_cast<OMPDeclareMapperDecl>(Global)) { | |||
3324 | if (MustBeEmitted(Global)) | |||
3325 | EmitOMPDeclareMapper(DMD); | |||
3326 | return; | |||
3327 | } | |||
3328 | } | |||
3329 | ||||
3330 | // Ignore declarations, they will be emitted on their first use. | |||
3331 | if (const auto *FD = dyn_cast<FunctionDecl>(Global)) { | |||
3332 | // Forward declarations are emitted lazily on first use. | |||
3333 | if (!FD->doesThisDeclarationHaveABody()) { | |||
3334 | if (!FD->doesDeclarationForceExternallyVisibleDefinition()) | |||
3335 | return; | |||
3336 | ||||
3337 | StringRef MangledName = getMangledName(GD); | |||
3338 | ||||
3339 | // Compute the function info and LLVM type. | |||
3340 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
3341 | llvm::Type *Ty = getTypes().GetFunctionType(FI); | |||
3342 | ||||
3343 | GetOrCreateLLVMFunction(MangledName, Ty, GD, /*ForVTable=*/false, | |||
3344 | /*DontDefer=*/false); | |||
3345 | return; | |||
3346 | } | |||
3347 | } else { | |||
3348 | const auto *VD = cast<VarDecl>(Global); | |||
3349 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global.")(static_cast <bool> (VD->isFileVarDecl() && "Cannot emit local var decl as global." ) ? void (0) : __assert_fail ("VD->isFileVarDecl() && \"Cannot emit local var decl as global.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3349, __extension__ __PRETTY_FUNCTION__ )); | |||
3350 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition && | |||
3351 | !Context.isMSStaticDataMemberInlineDefinition(VD)) { | |||
3352 | if (LangOpts.OpenMP) { | |||
3353 | // Emit declaration of the must-be-emitted declare target variable. | |||
3354 | if (std::optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res = | |||
3355 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD)) { | |||
3356 | bool UnifiedMemoryEnabled = | |||
3357 | getOpenMPRuntime().hasRequiresUnifiedSharedMemory(); | |||
3358 | if ((*Res == OMPDeclareTargetDeclAttr::MT_To || | |||
3359 | *Res == OMPDeclareTargetDeclAttr::MT_Enter) && | |||
3360 | !UnifiedMemoryEnabled) { | |||
3361 | (void)GetAddrOfGlobalVar(VD); | |||
3362 | } else { | |||
3363 | assert(((*Res == OMPDeclareTargetDeclAttr::MT_Link) ||(static_cast <bool> (((*Res == OMPDeclareTargetDeclAttr ::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled )) && "Link clause or to clause with unified memory expected." ) ? void (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3367, __extension__ __PRETTY_FUNCTION__ )) | |||
3364 | ((*Res == OMPDeclareTargetDeclAttr::MT_To ||(static_cast <bool> (((*Res == OMPDeclareTargetDeclAttr ::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled )) && "Link clause or to clause with unified memory expected." ) ? void (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3367, __extension__ __PRETTY_FUNCTION__ )) | |||
3365 | *Res == OMPDeclareTargetDeclAttr::MT_Enter) &&(static_cast <bool> (((*Res == OMPDeclareTargetDeclAttr ::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled )) && "Link clause or to clause with unified memory expected." ) ? void (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3367, __extension__ __PRETTY_FUNCTION__ )) | |||
3366 | UnifiedMemoryEnabled)) &&(static_cast <bool> (((*Res == OMPDeclareTargetDeclAttr ::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled )) && "Link clause or to clause with unified memory expected." ) ? void (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3367, __extension__ __PRETTY_FUNCTION__ )) | |||
3367 | "Link clause or to clause with unified memory expected.")(static_cast <bool> (((*Res == OMPDeclareTargetDeclAttr ::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled )) && "Link clause or to clause with unified memory expected." ) ? void (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || ((*Res == OMPDeclareTargetDeclAttr::MT_To || *Res == OMPDeclareTargetDeclAttr::MT_Enter) && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3367, __extension__ __PRETTY_FUNCTION__ )); | |||
3368 | (void)getOpenMPRuntime().getAddrOfDeclareTargetVar(VD); | |||
3369 | } | |||
3370 | ||||
3371 | return; | |||
3372 | } | |||
3373 | } | |||
3374 | // If this declaration may have caused an inline variable definition to | |||
3375 | // change linkage, make sure that it's emitted. | |||
3376 | if (Context.getInlineVariableDefinitionKind(VD) == | |||
3377 | ASTContext::InlineVariableDefinitionKind::Strong) | |||
3378 | GetAddrOfGlobalVar(VD); | |||
3379 | return; | |||
3380 | } | |||
3381 | } | |||
3382 | ||||
3383 | // Defer code generation to first use when possible, e.g. if this is an inline | |||
3384 | // function. If the global must always be emitted, do it eagerly if possible | |||
3385 | // to benefit from cache locality. | |||
3386 | if (MustBeEmitted(Global) && MayBeEmittedEagerly(Global)) { | |||
3387 | // Emit the definition if it can't be deferred. | |||
3388 | EmitGlobalDefinition(GD); | |||
3389 | return; | |||
3390 | } | |||
3391 | ||||
3392 | // If we're deferring emission of a C++ variable with an | |||
3393 | // initializer, remember the order in which it appeared in the file. | |||
3394 | if (getLangOpts().CPlusPlus && isa<VarDecl>(Global) && | |||
3395 | cast<VarDecl>(Global)->hasInit()) { | |||
3396 | DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); | |||
3397 | CXXGlobalInits.push_back(nullptr); | |||
3398 | } | |||
3399 | ||||
3400 | StringRef MangledName = getMangledName(GD); | |||
3401 | if (GetGlobalValue(MangledName) != nullptr) { | |||
3402 | // The value has already been used and should therefore be emitted. | |||
3403 | addDeferredDeclToEmit(GD); | |||
3404 | } else if (MustBeEmitted(Global)) { | |||
3405 | // The value must be emitted, but cannot be emitted eagerly. | |||
3406 | assert(!MayBeEmittedEagerly(Global))(static_cast <bool> (!MayBeEmittedEagerly(Global)) ? void (0) : __assert_fail ("!MayBeEmittedEagerly(Global)", "clang/lib/CodeGen/CodeGenModule.cpp" , 3406, __extension__ __PRETTY_FUNCTION__)); | |||
3407 | addDeferredDeclToEmit(GD); | |||
3408 | EmittedDeferredDecls[MangledName] = GD; | |||
3409 | } else { | |||
3410 | // Otherwise, remember that we saw a deferred decl with this name. The | |||
3411 | // first use of the mangled name will cause it to move into | |||
3412 | // DeferredDeclsToEmit. | |||
3413 | DeferredDecls[MangledName] = GD; | |||
3414 | } | |||
3415 | } | |||
3416 | ||||
3417 | // Check if T is a class type with a destructor that's not dllimport. | |||
3418 | static bool HasNonDllImportDtor(QualType T) { | |||
3419 | if (const auto *RT = T->getBaseElementTypeUnsafe()->getAs<RecordType>()) | |||
3420 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) | |||
3421 | if (RD->getDestructor() && !RD->getDestructor()->hasAttr<DLLImportAttr>()) | |||
3422 | return true; | |||
3423 | ||||
3424 | return false; | |||
3425 | } | |||
3426 | ||||
3427 | namespace { | |||
3428 | struct FunctionIsDirectlyRecursive | |||
3429 | : public ConstStmtVisitor<FunctionIsDirectlyRecursive, bool> { | |||
3430 | const StringRef Name; | |||
3431 | const Builtin::Context &BI; | |||
3432 | FunctionIsDirectlyRecursive(StringRef N, const Builtin::Context &C) | |||
3433 | : Name(N), BI(C) {} | |||
3434 | ||||
3435 | bool VisitCallExpr(const CallExpr *E) { | |||
3436 | const FunctionDecl *FD = E->getDirectCallee(); | |||
3437 | if (!FD) | |||
3438 | return false; | |||
3439 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); | |||
3440 | if (Attr && Name == Attr->getLabel()) | |||
3441 | return true; | |||
3442 | unsigned BuiltinID = FD->getBuiltinID(); | |||
3443 | if (!BuiltinID || !BI.isLibFunction(BuiltinID)) | |||
3444 | return false; | |||
3445 | StringRef BuiltinName = BI.getName(BuiltinID); | |||
3446 | if (BuiltinName.startswith("__builtin_") && | |||
3447 | Name == BuiltinName.slice(strlen("__builtin_"), StringRef::npos)) { | |||
3448 | return true; | |||
3449 | } | |||
3450 | return false; | |||
3451 | } | |||
3452 | ||||
3453 | bool VisitStmt(const Stmt *S) { | |||
3454 | for (const Stmt *Child : S->children()) | |||
3455 | if (Child && this->Visit(Child)) | |||
3456 | return true; | |||
3457 | return false; | |||
3458 | } | |||
3459 | }; | |||
3460 | ||||
3461 | // Make sure we're not referencing non-imported vars or functions. | |||
3462 | struct DLLImportFunctionVisitor | |||
3463 | : public RecursiveASTVisitor<DLLImportFunctionVisitor> { | |||
3464 | bool SafeToInline = true; | |||
3465 | ||||
3466 | bool shouldVisitImplicitCode() const { return true; } | |||
3467 | ||||
3468 | bool VisitVarDecl(VarDecl *VD) { | |||
3469 | if (VD->getTLSKind()) { | |||
3470 | // A thread-local variable cannot be imported. | |||
3471 | SafeToInline = false; | |||
3472 | return SafeToInline; | |||
3473 | } | |||
3474 | ||||
3475 | // A variable definition might imply a destructor call. | |||
3476 | if (VD->isThisDeclarationADefinition()) | |||
3477 | SafeToInline = !HasNonDllImportDtor(VD->getType()); | |||
3478 | ||||
3479 | return SafeToInline; | |||
3480 | } | |||
3481 | ||||
3482 | bool VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { | |||
3483 | if (const auto *D = E->getTemporary()->getDestructor()) | |||
3484 | SafeToInline = D->hasAttr<DLLImportAttr>(); | |||
3485 | return SafeToInline; | |||
3486 | } | |||
3487 | ||||
3488 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
3489 | ValueDecl *VD = E->getDecl(); | |||
3490 | if (isa<FunctionDecl>(VD)) | |||
3491 | SafeToInline = VD->hasAttr<DLLImportAttr>(); | |||
3492 | else if (VarDecl *V = dyn_cast<VarDecl>(VD)) | |||
3493 | SafeToInline = !V->hasGlobalStorage() || V->hasAttr<DLLImportAttr>(); | |||
3494 | return SafeToInline; | |||
3495 | } | |||
3496 | ||||
3497 | bool VisitCXXConstructExpr(CXXConstructExpr *E) { | |||
3498 | SafeToInline = E->getConstructor()->hasAttr<DLLImportAttr>(); | |||
3499 | return SafeToInline; | |||
3500 | } | |||
3501 | ||||
3502 | bool VisitCXXMemberCallExpr(CXXMemberCallExpr *E) { | |||
3503 | CXXMethodDecl *M = E->getMethodDecl(); | |||
3504 | if (!M) { | |||
3505 | // Call through a pointer to member function. This is safe to inline. | |||
3506 | SafeToInline = true; | |||
3507 | } else { | |||
3508 | SafeToInline = M->hasAttr<DLLImportAttr>(); | |||
3509 | } | |||
3510 | return SafeToInline; | |||
3511 | } | |||
3512 | ||||
3513 | bool VisitCXXDeleteExpr(CXXDeleteExpr *E) { | |||
3514 | SafeToInline = E->getOperatorDelete()->hasAttr<DLLImportAttr>(); | |||
3515 | return SafeToInline; | |||
3516 | } | |||
3517 | ||||
3518 | bool VisitCXXNewExpr(CXXNewExpr *E) { | |||
3519 | SafeToInline = E->getOperatorNew()->hasAttr<DLLImportAttr>(); | |||
3520 | return SafeToInline; | |||
3521 | } | |||
3522 | }; | |||
3523 | } | |||
3524 | ||||
3525 | // isTriviallyRecursive - Check if this function calls another | |||
3526 | // decl that, because of the asm attribute or the other decl being a builtin, | |||
3527 | // ends up pointing to itself. | |||
3528 | bool | |||
3529 | CodeGenModule::isTriviallyRecursive(const FunctionDecl *FD) { | |||
3530 | StringRef Name; | |||
3531 | if (getCXXABI().getMangleContext().shouldMangleDeclName(FD)) { | |||
3532 | // asm labels are a special kind of mangling we have to support. | |||
3533 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); | |||
3534 | if (!Attr) | |||
3535 | return false; | |||
3536 | Name = Attr->getLabel(); | |||
3537 | } else { | |||
3538 | Name = FD->getName(); | |||
3539 | } | |||
3540 | ||||
3541 | FunctionIsDirectlyRecursive Walker(Name, Context.BuiltinInfo); | |||
3542 | const Stmt *Body = FD->getBody(); | |||
3543 | return Body ? Walker.Visit(Body) : false; | |||
3544 | } | |||
3545 | ||||
3546 | bool CodeGenModule::shouldEmitFunction(GlobalDecl GD) { | |||
3547 | if (getFunctionLinkage(GD) != llvm::Function::AvailableExternallyLinkage) | |||
3548 | return true; | |||
3549 | const auto *F = cast<FunctionDecl>(GD.getDecl()); | |||
3550 | if (CodeGenOpts.OptimizationLevel == 0 && !F->hasAttr<AlwaysInlineAttr>()) | |||
3551 | return false; | |||
3552 | ||||
3553 | if (F->hasAttr<DLLImportAttr>() && !F->hasAttr<AlwaysInlineAttr>()) { | |||
3554 | // Check whether it would be safe to inline this dllimport function. | |||
3555 | DLLImportFunctionVisitor Visitor; | |||
3556 | Visitor.TraverseFunctionDecl(const_cast<FunctionDecl*>(F)); | |||
3557 | if (!Visitor.SafeToInline) | |||
3558 | return false; | |||
3559 | ||||
3560 | if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(F)) { | |||
3561 | // Implicit destructor invocations aren't captured in the AST, so the | |||
3562 | // check above can't see them. Check for them manually here. | |||
3563 | for (const Decl *Member : Dtor->getParent()->decls()) | |||
3564 | if (isa<FieldDecl>(Member)) | |||
3565 | if (HasNonDllImportDtor(cast<FieldDecl>(Member)->getType())) | |||
3566 | return false; | |||
3567 | for (const CXXBaseSpecifier &B : Dtor->getParent()->bases()) | |||
3568 | if (HasNonDllImportDtor(B.getType())) | |||
3569 | return false; | |||
3570 | } | |||
3571 | } | |||
3572 | ||||
3573 | // Inline builtins declaration must be emitted. They often are fortified | |||
3574 | // functions. | |||
3575 | if (F->isInlineBuiltinDeclaration()) | |||
3576 | return true; | |||
3577 | ||||
3578 | // PR9614. Avoid cases where the source code is lying to us. An available | |||
3579 | // externally function should have an equivalent function somewhere else, | |||
3580 | // but a function that calls itself through asm label/`__builtin_` trickery is | |||
3581 | // clearly not equivalent to the real implementation. | |||
3582 | // This happens in glibc's btowc and in some configure checks. | |||
3583 | return !isTriviallyRecursive(F); | |||
3584 | } | |||
3585 | ||||
3586 | bool CodeGenModule::shouldOpportunisticallyEmitVTables() { | |||
3587 | return CodeGenOpts.OptimizationLevel > 0; | |||
3588 | } | |||
3589 | ||||
3590 | void CodeGenModule::EmitMultiVersionFunctionDefinition(GlobalDecl GD, | |||
3591 | llvm::GlobalValue *GV) { | |||
3592 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3593 | ||||
3594 | if (FD->isCPUSpecificMultiVersion()) { | |||
3595 | auto *Spec = FD->getAttr<CPUSpecificAttr>(); | |||
3596 | for (unsigned I = 0; I < Spec->cpus_size(); ++I) | |||
3597 | EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr); | |||
3598 | } else if (FD->isTargetClonesMultiVersion()) { | |||
3599 | auto *Clone = FD->getAttr<TargetClonesAttr>(); | |||
3600 | for (unsigned I = 0; I < Clone->featuresStrs_size(); ++I) | |||
3601 | if (Clone->isFirstOfVersion(I)) | |||
3602 | EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr); | |||
3603 | // Ensure that the resolver function is also emitted. | |||
3604 | GetOrCreateMultiVersionResolver(GD); | |||
3605 | } else | |||
3606 | EmitGlobalFunctionDefinition(GD, GV); | |||
3607 | } | |||
3608 | ||||
3609 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD, llvm::GlobalValue *GV) { | |||
3610 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
3611 | ||||
3612 | PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), | |||
3613 | Context.getSourceManager(), | |||
3614 | "Generating code for declaration"); | |||
3615 | ||||
3616 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
3617 | // At -O0, don't generate IR for functions with available_externally | |||
3618 | // linkage. | |||
3619 | if (!shouldEmitFunction(GD)) | |||
3620 | return; | |||
3621 | ||||
3622 | llvm::TimeTraceScope TimeScope("CodeGen Function", [&]() { | |||
3623 | std::string Name; | |||
3624 | llvm::raw_string_ostream OS(Name); | |||
3625 | FD->getNameForDiagnostic(OS, getContext().getPrintingPolicy(), | |||
3626 | /*Qualified=*/true); | |||
3627 | return Name; | |||
3628 | }); | |||
3629 | ||||
3630 | if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
3631 | // Make sure to emit the definition(s) before we emit the thunks. | |||
3632 | // This is necessary for the generation of certain thunks. | |||
3633 | if (isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method)) | |||
3634 | ABI->emitCXXStructor(GD); | |||
3635 | else if (FD->isMultiVersion()) | |||
3636 | EmitMultiVersionFunctionDefinition(GD, GV); | |||
3637 | else | |||
3638 | EmitGlobalFunctionDefinition(GD, GV); | |||
3639 | ||||
3640 | if (Method->isVirtual()) | |||
3641 | getVTables().EmitThunks(GD); | |||
3642 | ||||
3643 | return; | |||
3644 | } | |||
3645 | ||||
3646 | if (FD->isMultiVersion()) | |||
3647 | return EmitMultiVersionFunctionDefinition(GD, GV); | |||
3648 | return EmitGlobalFunctionDefinition(GD, GV); | |||
3649 | } | |||
3650 | ||||
3651 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
3652 | return EmitGlobalVarDefinition(VD, !VD->hasDefinition()); | |||
3653 | ||||
3654 | llvm_unreachable("Invalid argument to EmitGlobalDefinition()")::llvm::llvm_unreachable_internal("Invalid argument to EmitGlobalDefinition()" , "clang/lib/CodeGen/CodeGenModule.cpp", 3654); | |||
3655 | } | |||
3656 | ||||
3657 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, | |||
3658 | llvm::Function *NewFn); | |||
3659 | ||||
3660 | static unsigned | |||
3661 | TargetMVPriority(const TargetInfo &TI, | |||
3662 | const CodeGenFunction::MultiVersionResolverOption &RO) { | |||
3663 | unsigned Priority = 0; | |||
3664 | unsigned NumFeatures = 0; | |||
3665 | for (StringRef Feat : RO.Conditions.Features) { | |||
3666 | Priority = std::max(Priority, TI.multiVersionSortPriority(Feat)); | |||
3667 | NumFeatures++; | |||
3668 | } | |||
3669 | ||||
3670 | if (!RO.Conditions.Architecture.empty()) | |||
3671 | Priority = std::max( | |||
3672 | Priority, TI.multiVersionSortPriority(RO.Conditions.Architecture)); | |||
3673 | ||||
3674 | Priority += TI.multiVersionFeatureCost() * NumFeatures; | |||
3675 | ||||
3676 | return Priority; | |||
3677 | } | |||
3678 | ||||
3679 | // Multiversion functions should be at most 'WeakODRLinkage' so that a different | |||
3680 | // TU can forward declare the function without causing problems. Particularly | |||
3681 | // in the cases of CPUDispatch, this causes issues. This also makes sure we | |||
3682 | // work with internal linkage functions, so that the same function name can be | |||
3683 | // used with internal linkage in multiple TUs. | |||
3684 | llvm::GlobalValue::LinkageTypes getMultiversionLinkage(CodeGenModule &CGM, | |||
3685 | GlobalDecl GD) { | |||
3686 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3687 | if (FD->getFormalLinkage() == InternalLinkage) | |||
3688 | return llvm::GlobalValue::InternalLinkage; | |||
3689 | return llvm::GlobalValue::WeakODRLinkage; | |||
3690 | } | |||
3691 | ||||
3692 | void CodeGenModule::emitMultiVersionFunctions() { | |||
3693 | std::vector<GlobalDecl> MVFuncsToEmit; | |||
3694 | MultiVersionFuncs.swap(MVFuncsToEmit); | |||
3695 | for (GlobalDecl GD : MVFuncsToEmit) { | |||
3696 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3697 | assert(FD && "Expected a FunctionDecl")(static_cast <bool> (FD && "Expected a FunctionDecl" ) ? void (0) : __assert_fail ("FD && \"Expected a FunctionDecl\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3697, __extension__ __PRETTY_FUNCTION__ )); | |||
3698 | ||||
3699 | SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options; | |||
3700 | if (FD->isTargetMultiVersion()) { | |||
3701 | getContext().forEachMultiversionedFunctionVersion( | |||
3702 | FD, [this, &GD, &Options](const FunctionDecl *CurFD) { | |||
3703 | GlobalDecl CurGD{ | |||
3704 | (CurFD->isDefined() ? CurFD->getDefinition() : CurFD)}; | |||
3705 | StringRef MangledName = getMangledName(CurGD); | |||
3706 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
3707 | if (!Func) { | |||
3708 | if (CurFD->isDefined()) { | |||
3709 | EmitGlobalFunctionDefinition(CurGD, nullptr); | |||
3710 | Func = GetGlobalValue(MangledName); | |||
3711 | } else { | |||
3712 | const CGFunctionInfo &FI = | |||
3713 | getTypes().arrangeGlobalDeclaration(GD); | |||
3714 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
3715 | Func = GetAddrOfFunction(CurGD, Ty, /*ForVTable=*/false, | |||
3716 | /*DontDefer=*/false, ForDefinition); | |||
3717 | } | |||
3718 | assert(Func && "This should have just been created")(static_cast <bool> (Func && "This should have just been created" ) ? void (0) : __assert_fail ("Func && \"This should have just been created\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3718, __extension__ __PRETTY_FUNCTION__ )); | |||
3719 | } | |||
3720 | if (CurFD->getMultiVersionKind() == MultiVersionKind::Target) { | |||
3721 | const auto *TA = CurFD->getAttr<TargetAttr>(); | |||
3722 | llvm::SmallVector<StringRef, 8> Feats; | |||
3723 | TA->getAddedFeatures(Feats); | |||
3724 | Options.emplace_back(cast<llvm::Function>(Func), | |||
3725 | TA->getArchitecture(), Feats); | |||
3726 | } else { | |||
3727 | const auto *TVA = CurFD->getAttr<TargetVersionAttr>(); | |||
3728 | llvm::SmallVector<StringRef, 8> Feats; | |||
3729 | TVA->getFeatures(Feats); | |||
3730 | Options.emplace_back(cast<llvm::Function>(Func), | |||
3731 | /*Architecture*/ "", Feats); | |||
3732 | } | |||
3733 | }); | |||
3734 | } else if (FD->isTargetClonesMultiVersion()) { | |||
3735 | const auto *TC = FD->getAttr<TargetClonesAttr>(); | |||
3736 | for (unsigned VersionIndex = 0; VersionIndex < TC->featuresStrs_size(); | |||
3737 | ++VersionIndex) { | |||
3738 | if (!TC->isFirstOfVersion(VersionIndex)) | |||
3739 | continue; | |||
3740 | GlobalDecl CurGD{(FD->isDefined() ? FD->getDefinition() : FD), | |||
3741 | VersionIndex}; | |||
3742 | StringRef Version = TC->getFeatureStr(VersionIndex); | |||
3743 | StringRef MangledName = getMangledName(CurGD); | |||
3744 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
3745 | if (!Func) { | |||
3746 | if (FD->isDefined()) { | |||
3747 | EmitGlobalFunctionDefinition(CurGD, nullptr); | |||
3748 | Func = GetGlobalValue(MangledName); | |||
3749 | } else { | |||
3750 | const CGFunctionInfo &FI = | |||
3751 | getTypes().arrangeGlobalDeclaration(CurGD); | |||
3752 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
3753 | Func = GetAddrOfFunction(CurGD, Ty, /*ForVTable=*/false, | |||
3754 | /*DontDefer=*/false, ForDefinition); | |||
3755 | } | |||
3756 | assert(Func && "This should have just been created")(static_cast <bool> (Func && "This should have just been created" ) ? void (0) : __assert_fail ("Func && \"This should have just been created\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3756, __extension__ __PRETTY_FUNCTION__ )); | |||
3757 | } | |||
3758 | ||||
3759 | StringRef Architecture; | |||
3760 | llvm::SmallVector<StringRef, 1> Feature; | |||
3761 | ||||
3762 | if (getTarget().getTriple().isAArch64()) { | |||
3763 | if (Version != "default") { | |||
3764 | llvm::SmallVector<StringRef, 8> VerFeats; | |||
3765 | Version.split(VerFeats, "+"); | |||
3766 | for (auto &CurFeat : VerFeats) | |||
3767 | Feature.push_back(CurFeat.trim()); | |||
3768 | } | |||
3769 | } else { | |||
3770 | if (Version.startswith("arch=")) | |||
3771 | Architecture = Version.drop_front(sizeof("arch=") - 1); | |||
3772 | else if (Version != "default") | |||
3773 | Feature.push_back(Version); | |||
3774 | } | |||
3775 | ||||
3776 | Options.emplace_back(cast<llvm::Function>(Func), Architecture, Feature); | |||
3777 | } | |||
3778 | } else { | |||
3779 | assert(0 && "Expected a target or target_clones multiversion function")(static_cast <bool> (0 && "Expected a target or target_clones multiversion function" ) ? void (0) : __assert_fail ("0 && \"Expected a target or target_clones multiversion function\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3779, __extension__ __PRETTY_FUNCTION__ )); | |||
3780 | continue; | |||
3781 | } | |||
3782 | ||||
3783 | llvm::Constant *ResolverConstant = GetOrCreateMultiVersionResolver(GD); | |||
3784 | if (auto *IFunc = dyn_cast<llvm::GlobalIFunc>(ResolverConstant)) | |||
3785 | ResolverConstant = IFunc->getResolver(); | |||
3786 | llvm::Function *ResolverFunc = cast<llvm::Function>(ResolverConstant); | |||
3787 | ||||
3788 | ResolverFunc->setLinkage(getMultiversionLinkage(*this, GD)); | |||
3789 | ||||
3790 | if (supportsCOMDAT()) | |||
3791 | ResolverFunc->setComdat( | |||
3792 | getModule().getOrInsertComdat(ResolverFunc->getName())); | |||
3793 | ||||
3794 | const TargetInfo &TI = getTarget(); | |||
3795 | llvm::stable_sort( | |||
3796 | Options, [&TI](const CodeGenFunction::MultiVersionResolverOption &LHS, | |||
3797 | const CodeGenFunction::MultiVersionResolverOption &RHS) { | |||
3798 | return TargetMVPriority(TI, LHS) > TargetMVPriority(TI, RHS); | |||
3799 | }); | |||
3800 | CodeGenFunction CGF(*this); | |||
3801 | CGF.EmitMultiVersionResolver(ResolverFunc, Options); | |||
3802 | } | |||
3803 | ||||
3804 | // Ensure that any additions to the deferred decls list caused by emitting a | |||
3805 | // variant are emitted. This can happen when the variant itself is inline and | |||
3806 | // calls a function without linkage. | |||
3807 | if (!MVFuncsToEmit.empty()) | |||
3808 | EmitDeferred(); | |||
3809 | ||||
3810 | // Ensure that any additions to the multiversion funcs list from either the | |||
3811 | // deferred decls or the multiversion functions themselves are emitted. | |||
3812 | if (!MultiVersionFuncs.empty()) | |||
3813 | emitMultiVersionFunctions(); | |||
3814 | } | |||
3815 | ||||
3816 | void CodeGenModule::emitCPUDispatchDefinition(GlobalDecl GD) { | |||
3817 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3818 | assert(FD && "Not a FunctionDecl?")(static_cast <bool> (FD && "Not a FunctionDecl?" ) ? void (0) : __assert_fail ("FD && \"Not a FunctionDecl?\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3818, __extension__ __PRETTY_FUNCTION__ )); | |||
3819 | assert(FD->isCPUDispatchMultiVersion() && "Not a multiversion function?")(static_cast <bool> (FD->isCPUDispatchMultiVersion() && "Not a multiversion function?") ? void (0) : __assert_fail ("FD->isCPUDispatchMultiVersion() && \"Not a multiversion function?\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3819, __extension__ __PRETTY_FUNCTION__ )); | |||
3820 | const auto *DD = FD->getAttr<CPUDispatchAttr>(); | |||
3821 | assert(DD && "Not a cpu_dispatch Function?")(static_cast <bool> (DD && "Not a cpu_dispatch Function?" ) ? void (0) : __assert_fail ("DD && \"Not a cpu_dispatch Function?\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3821, __extension__ __PRETTY_FUNCTION__ )); | |||
3822 | ||||
3823 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
3824 | llvm::FunctionType *DeclTy = getTypes().GetFunctionType(FI); | |||
3825 | ||||
3826 | StringRef ResolverName = getMangledName(GD); | |||
3827 | UpdateMultiVersionNames(GD, FD, ResolverName); | |||
3828 | ||||
3829 | llvm::Type *ResolverType; | |||
3830 | GlobalDecl ResolverGD; | |||
3831 | if (getTarget().supportsIFunc()) { | |||
3832 | ResolverType = llvm::FunctionType::get( | |||
3833 | llvm::PointerType::get(DeclTy, | |||
3834 | getTypes().getTargetAddressSpace(FD->getType())), | |||
3835 | false); | |||
3836 | } | |||
3837 | else { | |||
3838 | ResolverType = DeclTy; | |||
3839 | ResolverGD = GD; | |||
3840 | } | |||
3841 | ||||
3842 | auto *ResolverFunc = cast<llvm::Function>(GetOrCreateLLVMFunction( | |||
3843 | ResolverName, ResolverType, ResolverGD, /*ForVTable=*/false)); | |||
3844 | ResolverFunc->setLinkage(getMultiversionLinkage(*this, GD)); | |||
3845 | if (supportsCOMDAT()) | |||
3846 | ResolverFunc->setComdat( | |||
3847 | getModule().getOrInsertComdat(ResolverFunc->getName())); | |||
3848 | ||||
3849 | SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options; | |||
3850 | const TargetInfo &Target = getTarget(); | |||
3851 | unsigned Index = 0; | |||
3852 | for (const IdentifierInfo *II : DD->cpus()) { | |||
3853 | // Get the name of the target function so we can look it up/create it. | |||
3854 | std::string MangledName = getMangledNameImpl(*this, GD, FD, true) + | |||
3855 | getCPUSpecificMangling(*this, II->getName()); | |||
3856 | ||||
3857 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
3858 | ||||
3859 | if (!Func) { | |||
3860 | GlobalDecl ExistingDecl = Manglings.lookup(MangledName); | |||
3861 | if (ExistingDecl.getDecl() && | |||
3862 | ExistingDecl.getDecl()->getAsFunction()->isDefined()) { | |||
3863 | EmitGlobalFunctionDefinition(ExistingDecl, nullptr); | |||
3864 | Func = GetGlobalValue(MangledName); | |||
3865 | } else { | |||
3866 | if (!ExistingDecl.getDecl()) | |||
3867 | ExistingDecl = GD.getWithMultiVersionIndex(Index); | |||
3868 | ||||
3869 | Func = GetOrCreateLLVMFunction( | |||
3870 | MangledName, DeclTy, ExistingDecl, | |||
3871 | /*ForVTable=*/false, /*DontDefer=*/true, | |||
3872 | /*IsThunk=*/false, llvm::AttributeList(), ForDefinition); | |||
3873 | } | |||
3874 | } | |||
3875 | ||||
3876 | llvm::SmallVector<StringRef, 32> Features; | |||
3877 | Target.getCPUSpecificCPUDispatchFeatures(II->getName(), Features); | |||
3878 | llvm::transform(Features, Features.begin(), | |||
3879 | [](StringRef Str) { return Str.substr(1); }); | |||
3880 | llvm::erase_if(Features, [&Target](StringRef Feat) { | |||
3881 | return !Target.validateCpuSupports(Feat); | |||
3882 | }); | |||
3883 | Options.emplace_back(cast<llvm::Function>(Func), StringRef{}, Features); | |||
3884 | ++Index; | |||
3885 | } | |||
3886 | ||||
3887 | llvm::stable_sort( | |||
3888 | Options, [](const CodeGenFunction::MultiVersionResolverOption &LHS, | |||
3889 | const CodeGenFunction::MultiVersionResolverOption &RHS) { | |||
3890 | return llvm::X86::getCpuSupportsMask(LHS.Conditions.Features) > | |||
3891 | llvm::X86::getCpuSupportsMask(RHS.Conditions.Features); | |||
3892 | }); | |||
3893 | ||||
3894 | // If the list contains multiple 'default' versions, such as when it contains | |||
3895 | // 'pentium' and 'generic', don't emit the call to the generic one (since we | |||
3896 | // always run on at least a 'pentium'). We do this by deleting the 'least | |||
3897 | // advanced' (read, lowest mangling letter). | |||
3898 | while (Options.size() > 1 && | |||
3899 | llvm::X86::getCpuSupportsMask( | |||
3900 | (Options.end() - 2)->Conditions.Features) == 0) { | |||
3901 | StringRef LHSName = (Options.end() - 2)->Function->getName(); | |||
3902 | StringRef RHSName = (Options.end() - 1)->Function->getName(); | |||
3903 | if (LHSName.compare(RHSName) < 0) | |||
3904 | Options.erase(Options.end() - 2); | |||
3905 | else | |||
3906 | Options.erase(Options.end() - 1); | |||
3907 | } | |||
3908 | ||||
3909 | CodeGenFunction CGF(*this); | |||
3910 | CGF.EmitMultiVersionResolver(ResolverFunc, Options); | |||
3911 | ||||
3912 | if (getTarget().supportsIFunc()) { | |||
3913 | llvm::GlobalValue::LinkageTypes Linkage = getMultiversionLinkage(*this, GD); | |||
3914 | auto *IFunc = cast<llvm::GlobalValue>(GetOrCreateMultiVersionResolver(GD)); | |||
3915 | ||||
3916 | // Fix up function declarations that were created for cpu_specific before | |||
3917 | // cpu_dispatch was known | |||
3918 | if (!isa<llvm::GlobalIFunc>(IFunc)) { | |||
3919 | assert(cast<llvm::Function>(IFunc)->isDeclaration())(static_cast <bool> (cast<llvm::Function>(IFunc)-> isDeclaration()) ? void (0) : __assert_fail ("cast<llvm::Function>(IFunc)->isDeclaration()" , "clang/lib/CodeGen/CodeGenModule.cpp", 3919, __extension__ __PRETTY_FUNCTION__ )); | |||
3920 | auto *GI = llvm::GlobalIFunc::create(DeclTy, 0, Linkage, "", ResolverFunc, | |||
3921 | &getModule()); | |||
3922 | GI->takeName(IFunc); | |||
3923 | IFunc->replaceAllUsesWith(GI); | |||
3924 | IFunc->eraseFromParent(); | |||
3925 | IFunc = GI; | |||
3926 | } | |||
3927 | ||||
3928 | std::string AliasName = getMangledNameImpl( | |||
3929 | *this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
3930 | llvm::Constant *AliasFunc = GetGlobalValue(AliasName); | |||
3931 | if (!AliasFunc) { | |||
3932 | auto *GA = llvm::GlobalAlias::create(DeclTy, 0, Linkage, AliasName, IFunc, | |||
3933 | &getModule()); | |||
3934 | SetCommonAttributes(GD, GA); | |||
3935 | } | |||
3936 | } | |||
3937 | } | |||
3938 | ||||
3939 | /// If a dispatcher for the specified mangled name is not in the module, create | |||
3940 | /// and return an llvm Function with the specified type. | |||
3941 | llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver(GlobalDecl GD) { | |||
3942 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3943 | assert(FD && "Not a FunctionDecl?")(static_cast <bool> (FD && "Not a FunctionDecl?" ) ? void (0) : __assert_fail ("FD && \"Not a FunctionDecl?\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3943, __extension__ __PRETTY_FUNCTION__ )); | |||
3944 | ||||
3945 | std::string MangledName = | |||
3946 | getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
3947 | ||||
3948 | // Holds the name of the resolver, in ifunc mode this is the ifunc (which has | |||
3949 | // a separate resolver). | |||
3950 | std::string ResolverName = MangledName; | |||
3951 | if (getTarget().supportsIFunc()) | |||
3952 | ResolverName += ".ifunc"; | |||
3953 | else if (FD->isTargetMultiVersion()) | |||
3954 | ResolverName += ".resolver"; | |||
3955 | ||||
3956 | // If the resolver has already been created, just return it. | |||
3957 | if (llvm::GlobalValue *ResolverGV = GetGlobalValue(ResolverName)) | |||
3958 | return ResolverGV; | |||
3959 | ||||
3960 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
3961 | llvm::FunctionType *DeclTy = getTypes().GetFunctionType(FI); | |||
3962 | ||||
3963 | // The resolver needs to be created. For target and target_clones, defer | |||
3964 | // creation until the end of the TU. | |||
3965 | if (FD->isTargetMultiVersion() || FD->isTargetClonesMultiVersion()) | |||
3966 | MultiVersionFuncs.push_back(GD); | |||
3967 | ||||
3968 | // For cpu_specific, don't create an ifunc yet because we don't know if the | |||
3969 | // cpu_dispatch will be emitted in this translation unit. | |||
3970 | if (getTarget().supportsIFunc() && !FD->isCPUSpecificMultiVersion()) { | |||
3971 | llvm::Type *ResolverType = llvm::FunctionType::get( | |||
3972 | llvm::PointerType::get(DeclTy, | |||
3973 | getTypes().getTargetAddressSpace(FD->getType())), | |||
3974 | false); | |||
3975 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
3976 | MangledName + ".resolver", ResolverType, GlobalDecl{}, | |||
3977 | /*ForVTable=*/false); | |||
3978 | llvm::GlobalIFunc *GIF = | |||
3979 | llvm::GlobalIFunc::create(DeclTy, 0, getMultiversionLinkage(*this, GD), | |||
3980 | "", Resolver, &getModule()); | |||
3981 | GIF->setName(ResolverName); | |||
3982 | SetCommonAttributes(FD, GIF); | |||
3983 | ||||
3984 | return GIF; | |||
3985 | } | |||
3986 | ||||
3987 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
3988 | ResolverName, DeclTy, GlobalDecl{}, /*ForVTable=*/false); | |||
3989 | assert(isa<llvm::GlobalValue>(Resolver) &&(static_cast <bool> (isa<llvm::GlobalValue>(Resolver ) && "Resolver should be created for the first time") ? void (0) : __assert_fail ("isa<llvm::GlobalValue>(Resolver) && \"Resolver should be created for the first time\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3990, __extension__ __PRETTY_FUNCTION__ )) | |||
3990 | "Resolver should be created for the first time")(static_cast <bool> (isa<llvm::GlobalValue>(Resolver ) && "Resolver should be created for the first time") ? void (0) : __assert_fail ("isa<llvm::GlobalValue>(Resolver) && \"Resolver should be created for the first time\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 3990, __extension__ __PRETTY_FUNCTION__ )); | |||
3991 | SetCommonAttributes(FD, cast<llvm::GlobalValue>(Resolver)); | |||
3992 | return Resolver; | |||
3993 | } | |||
3994 | ||||
3995 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the | |||
3996 | /// module, create and return an llvm Function with the specified type. If there | |||
3997 | /// is something in the module with the specified name, return it potentially | |||
3998 | /// bitcasted to the right type. | |||
3999 | /// | |||
4000 | /// If D is non-null, it specifies a decl that correspond to this. This is used | |||
4001 | /// to set the attributes on the function when it is first created. | |||
4002 | llvm::Constant *CodeGenModule::GetOrCreateLLVMFunction( | |||
4003 | StringRef MangledName, llvm::Type *Ty, GlobalDecl GD, bool ForVTable, | |||
4004 | bool DontDefer, bool IsThunk, llvm::AttributeList ExtraAttrs, | |||
4005 | ForDefinition_t IsForDefinition) { | |||
4006 | const Decl *D = GD.getDecl(); | |||
4007 | ||||
4008 | // Any attempts to use a MultiVersion function should result in retrieving | |||
4009 | // the iFunc instead. Name Mangling will handle the rest of the changes. | |||
4010 | if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D)) { | |||
4011 | // For the device mark the function as one that should be emitted. | |||
4012 | if (getLangOpts().OpenMPIsDevice && OpenMPRuntime && | |||
4013 | !OpenMPRuntime->markAsGlobalTarget(GD) && FD->isDefined() && | |||
4014 | !DontDefer && !IsForDefinition) { | |||
4015 | if (const FunctionDecl *FDDef = FD->getDefinition()) { | |||
4016 | GlobalDecl GDDef; | |||
4017 | if (const auto *CD = dyn_cast<CXXConstructorDecl>(FDDef)) | |||
4018 | GDDef = GlobalDecl(CD, GD.getCtorType()); | |||
4019 | else if (const auto *DD = dyn_cast<CXXDestructorDecl>(FDDef)) | |||
4020 | GDDef = GlobalDecl(DD, GD.getDtorType()); | |||
4021 | else | |||
4022 | GDDef = GlobalDecl(FDDef); | |||
4023 | EmitGlobal(GDDef); | |||
4024 | } | |||
4025 | } | |||
4026 | ||||
4027 | if (FD->isMultiVersion()) { | |||
4028 | UpdateMultiVersionNames(GD, FD, MangledName); | |||
4029 | if (!IsForDefinition) | |||
4030 | return GetOrCreateMultiVersionResolver(GD); | |||
4031 | } | |||
4032 | } | |||
4033 | ||||
4034 | // Lookup the entry, lazily creating it if necessary. | |||
4035 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
4036 | if (Entry) { | |||
4037 | if (WeakRefReferences.erase(Entry)) { | |||
4038 | const FunctionDecl *FD = cast_or_null<FunctionDecl>(D); | |||
4039 | if (FD && !FD->hasAttr<WeakAttr>()) | |||
4040 | Entry->setLinkage(llvm::Function::ExternalLinkage); | |||
4041 | } | |||
4042 | ||||
4043 | // Handle dropped DLL attributes. | |||
4044 | if (D && !D->hasAttr<DLLImportAttr>() && !D->hasAttr<DLLExportAttr>() && | |||
4045 | !shouldMapVisibilityToDLLExport(cast_or_null<NamedDecl>(D))) { | |||
4046 | Entry->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
4047 | setDSOLocal(Entry); | |||
4048 | } | |||
4049 | ||||
4050 | // If there are two attempts to define the same mangled name, issue an | |||
4051 | // error. | |||
4052 | if (IsForDefinition && !Entry->isDeclaration()) { | |||
4053 | GlobalDecl OtherGD; | |||
4054 | // Check that GD is not yet in DiagnosedConflictingDefinitions is required | |||
4055 | // to make sure that we issue an error only once. | |||
4056 | if (lookupRepresentativeDecl(MangledName, OtherGD) && | |||
4057 | (GD.getCanonicalDecl().getDecl() != | |||
4058 | OtherGD.getCanonicalDecl().getDecl()) && | |||
4059 | DiagnosedConflictingDefinitions.insert(GD).second) { | |||
4060 | getDiags().Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
4061 | << MangledName; | |||
4062 | getDiags().Report(OtherGD.getDecl()->getLocation(), | |||
4063 | diag::note_previous_definition); | |||
4064 | } | |||
4065 | } | |||
4066 | ||||
4067 | if ((isa<llvm::Function>(Entry) || isa<llvm::GlobalAlias>(Entry)) && | |||
4068 | (Entry->getValueType() == Ty)) { | |||
4069 | return Entry; | |||
4070 | } | |||
4071 | ||||
4072 | // Make sure the result is of the correct type. | |||
4073 | // (If function is requested for a definition, we always need to create a new | |||
4074 | // function, not just return a bitcast.) | |||
4075 | if (!IsForDefinition) | |||
4076 | return llvm::ConstantExpr::getBitCast( | |||
4077 | Entry, Ty->getPointerTo(Entry->getAddressSpace())); | |||
4078 | } | |||
4079 | ||||
4080 | // This function doesn't have a complete type (for example, the return | |||
4081 | // type is an incomplete struct). Use a fake type instead, and make | |||
4082 | // sure not to try to set attributes. | |||
4083 | bool IsIncompleteFunction = false; | |||
4084 | ||||
4085 | llvm::FunctionType *FTy; | |||
4086 | if (isa<llvm::FunctionType>(Ty)) { | |||
4087 | FTy = cast<llvm::FunctionType>(Ty); | |||
4088 | } else { | |||
4089 | FTy = llvm::FunctionType::get(VoidTy, false); | |||
4090 | IsIncompleteFunction = true; | |||
4091 | } | |||
4092 | ||||
4093 | llvm::Function *F = | |||
4094 | llvm::Function::Create(FTy, llvm::Function::ExternalLinkage, | |||
4095 | Entry ? StringRef() : MangledName, &getModule()); | |||
4096 | ||||
4097 | // If we already created a function with the same mangled name (but different | |||
4098 | // type) before, take its name and add it to the list of functions to be | |||
4099 | // replaced with F at the end of CodeGen. | |||
4100 | // | |||
4101 | // This happens if there is a prototype for a function (e.g. "int f()") and | |||
4102 | // then a definition of a different type (e.g. "int f(int x)"). | |||
4103 | if (Entry) { | |||
4104 | F->takeName(Entry); | |||
4105 | ||||
4106 | // This might be an implementation of a function without a prototype, in | |||
4107 | // which case, try to do special replacement of calls which match the new | |||
4108 | // prototype. The really key thing here is that we also potentially drop | |||
4109 | // arguments from the call site so as to make a direct call, which makes the | |||
4110 | // inliner happier and suppresses a number of optimizer warnings (!) about | |||
4111 | // dropping arguments. | |||
4112 | if (!Entry->use_empty()) { | |||
4113 | ReplaceUsesOfNonProtoTypeWithRealFunction(Entry, F); | |||
4114 | Entry->removeDeadConstantUsers(); | |||
4115 | } | |||
4116 | ||||
4117 | llvm::Constant *BC = llvm::ConstantExpr::getBitCast( | |||
4118 | F, Entry->getValueType()->getPointerTo(Entry->getAddressSpace())); | |||
4119 | addGlobalValReplacement(Entry, BC); | |||
4120 | } | |||
4121 | ||||
4122 | assert(F->getName() == MangledName && "name was uniqued!")(static_cast <bool> (F->getName() == MangledName && "name was uniqued!") ? void (0) : __assert_fail ("F->getName() == MangledName && \"name was uniqued!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4122, __extension__ __PRETTY_FUNCTION__ )); | |||
4123 | if (D) | |||
4124 | SetFunctionAttributes(GD, F, IsIncompleteFunction, IsThunk); | |||
4125 | if (ExtraAttrs.hasFnAttrs()) { | |||
4126 | llvm::AttrBuilder B(F->getContext(), ExtraAttrs.getFnAttrs()); | |||
4127 | F->addFnAttrs(B); | |||
4128 | } | |||
4129 | ||||
4130 | if (!DontDefer) { | |||
4131 | // All MSVC dtors other than the base dtor are linkonce_odr and delegate to | |||
4132 | // each other bottoming out with the base dtor. Therefore we emit non-base | |||
4133 | // dtors on usage, even if there is no dtor definition in the TU. | |||
4134 | if (isa_and_nonnull<CXXDestructorDecl>(D) && | |||
4135 | getCXXABI().useThunkForDtorVariant(cast<CXXDestructorDecl>(D), | |||
4136 | GD.getDtorType())) | |||
4137 | addDeferredDeclToEmit(GD); | |||
4138 | ||||
4139 | // This is the first use or definition of a mangled name. If there is a | |||
4140 | // deferred decl with this name, remember that we need to emit it at the end | |||
4141 | // of the file. | |||
4142 | auto DDI = DeferredDecls.find(MangledName); | |||
4143 | if (DDI != DeferredDecls.end()) { | |||
4144 | // Move the potentially referenced deferred decl to the | |||
4145 | // DeferredDeclsToEmit list, and remove it from DeferredDecls (since we | |||
4146 | // don't need it anymore). | |||
4147 | addDeferredDeclToEmit(DDI->second); | |||
4148 | EmittedDeferredDecls[DDI->first] = DDI->second; | |||
4149 | DeferredDecls.erase(DDI); | |||
4150 | ||||
4151 | // Otherwise, there are cases we have to worry about where we're | |||
4152 | // using a declaration for which we must emit a definition but where | |||
4153 | // we might not find a top-level definition: | |||
4154 | // - member functions defined inline in their classes | |||
4155 | // - friend functions defined inline in some class | |||
4156 | // - special member functions with implicit definitions | |||
4157 | // If we ever change our AST traversal to walk into class methods, | |||
4158 | // this will be unnecessary. | |||
4159 | // | |||
4160 | // We also don't emit a definition for a function if it's going to be an | |||
4161 | // entry in a vtable, unless it's already marked as used. | |||
4162 | } else if (getLangOpts().CPlusPlus && D) { | |||
4163 | // Look for a declaration that's lexically in a record. | |||
4164 | for (const auto *FD = cast<FunctionDecl>(D)->getMostRecentDecl(); FD; | |||
4165 | FD = FD->getPreviousDecl()) { | |||
4166 | if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { | |||
4167 | if (FD->doesThisDeclarationHaveABody()) { | |||
4168 | addDeferredDeclToEmit(GD.getWithDecl(FD)); | |||
4169 | break; | |||
4170 | } | |||
4171 | } | |||
4172 | } | |||
4173 | } | |||
4174 | } | |||
4175 | ||||
4176 | // Make sure the result is of the requested type. | |||
4177 | if (!IsIncompleteFunction) { | |||
4178 | assert(F->getFunctionType() == Ty)(static_cast <bool> (F->getFunctionType() == Ty) ? void (0) : __assert_fail ("F->getFunctionType() == Ty", "clang/lib/CodeGen/CodeGenModule.cpp" , 4178, __extension__ __PRETTY_FUNCTION__)); | |||
4179 | return F; | |||
4180 | } | |||
4181 | ||||
4182 | return llvm::ConstantExpr::getBitCast(F, | |||
4183 | Ty->getPointerTo(F->getAddressSpace())); | |||
4184 | } | |||
4185 | ||||
4186 | /// GetAddrOfFunction - Return the address of the given function. If Ty is | |||
4187 | /// non-null, then this function will use the specified type if it has to | |||
4188 | /// create it (this occurs when we see a definition of the function). | |||
4189 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, | |||
4190 | llvm::Type *Ty, | |||
4191 | bool ForVTable, | |||
4192 | bool DontDefer, | |||
4193 | ForDefinition_t IsForDefinition) { | |||
4194 | assert(!cast<FunctionDecl>(GD.getDecl())->isConsteval() &&(static_cast <bool> (!cast<FunctionDecl>(GD.getDecl ())->isConsteval() && "consteval function should never be emitted" ) ? void (0) : __assert_fail ("!cast<FunctionDecl>(GD.getDecl())->isConsteval() && \"consteval function should never be emitted\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4195, __extension__ __PRETTY_FUNCTION__ )) | |||
4195 | "consteval function should never be emitted")(static_cast <bool> (!cast<FunctionDecl>(GD.getDecl ())->isConsteval() && "consteval function should never be emitted" ) ? void (0) : __assert_fail ("!cast<FunctionDecl>(GD.getDecl())->isConsteval() && \"consteval function should never be emitted\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4195, __extension__ __PRETTY_FUNCTION__ )); | |||
4196 | // If there was no specific requested type, just convert it now. | |||
4197 | if (!Ty) { | |||
4198 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
4199 | Ty = getTypes().ConvertType(FD->getType()); | |||
4200 | } | |||
4201 | ||||
4202 | // Devirtualized destructor calls may come through here instead of via | |||
4203 | // getAddrOfCXXStructor. Make sure we use the MS ABI base destructor instead | |||
4204 | // of the complete destructor when necessary. | |||
4205 | if (const auto *DD = dyn_cast<CXXDestructorDecl>(GD.getDecl())) { | |||
4206 | if (getTarget().getCXXABI().isMicrosoft() && | |||
4207 | GD.getDtorType() == Dtor_Complete && | |||
4208 | DD->getParent()->getNumVBases() == 0) | |||
4209 | GD = GlobalDecl(DD, Dtor_Base); | |||
4210 | } | |||
4211 | ||||
4212 | StringRef MangledName = getMangledName(GD); | |||
4213 | auto *F = GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable, DontDefer, | |||
4214 | /*IsThunk=*/false, llvm::AttributeList(), | |||
4215 | IsForDefinition); | |||
4216 | // Returns kernel handle for HIP kernel stub function. | |||
4217 | if (LangOpts.CUDA && !LangOpts.CUDAIsDevice && | |||
4218 | cast<FunctionDecl>(GD.getDecl())->hasAttr<CUDAGlobalAttr>()) { | |||
4219 | auto *Handle = getCUDARuntime().getKernelHandle( | |||
4220 | cast<llvm::Function>(F->stripPointerCasts()), GD); | |||
4221 | if (IsForDefinition) | |||
4222 | return F; | |||
4223 | return llvm::ConstantExpr::getBitCast(Handle, Ty->getPointerTo()); | |||
4224 | } | |||
4225 | return F; | |||
4226 | } | |||
4227 | ||||
4228 | llvm::Constant *CodeGenModule::GetFunctionStart(const ValueDecl *Decl) { | |||
4229 | llvm::GlobalValue *F = | |||
4230 | cast<llvm::GlobalValue>(GetAddrOfFunction(Decl)->stripPointerCasts()); | |||
4231 | ||||
4232 | return llvm::ConstantExpr::getBitCast( | |||
4233 | llvm::NoCFIValue::get(F), | |||
4234 | llvm::Type::getInt8PtrTy(VMContext, F->getAddressSpace())); | |||
4235 | } | |||
4236 | ||||
4237 | static const FunctionDecl * | |||
4238 | GetRuntimeFunctionDecl(ASTContext &C, StringRef Name) { | |||
4239 | TranslationUnitDecl *TUDecl = C.getTranslationUnitDecl(); | |||
4240 | DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl); | |||
4241 | ||||
4242 | IdentifierInfo &CII = C.Idents.get(Name); | |||
4243 | for (const auto *Result : DC->lookup(&CII)) | |||
4244 | if (const auto *FD = dyn_cast<FunctionDecl>(Result)) | |||
4245 | return FD; | |||
4246 | ||||
4247 | if (!C.getLangOpts().CPlusPlus) | |||
4248 | return nullptr; | |||
4249 | ||||
4250 | // Demangle the premangled name from getTerminateFn() | |||
4251 | IdentifierInfo &CXXII = | |||
4252 | (Name == "_ZSt9terminatev" || Name == "?terminate@@YAXXZ") | |||
4253 | ? C.Idents.get("terminate") | |||
4254 | : C.Idents.get(Name); | |||
4255 | ||||
4256 | for (const auto &N : {"__cxxabiv1", "std"}) { | |||
4257 | IdentifierInfo &NS = C.Idents.get(N); | |||
4258 | for (const auto *Result : DC->lookup(&NS)) { | |||
4259 | const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(Result); | |||
4260 | if (auto *LSD = dyn_cast<LinkageSpecDecl>(Result)) | |||
4261 | for (const auto *Result : LSD->lookup(&NS)) | |||
4262 | if ((ND = dyn_cast<NamespaceDecl>(Result))) | |||
4263 | break; | |||
4264 | ||||
4265 | if (ND) | |||
4266 | for (const auto *Result : ND->lookup(&CXXII)) | |||
4267 | if (const auto *FD = dyn_cast<FunctionDecl>(Result)) | |||
4268 | return FD; | |||
4269 | } | |||
4270 | } | |||
4271 | ||||
4272 | return nullptr; | |||
4273 | } | |||
4274 | ||||
4275 | /// CreateRuntimeFunction - Create a new runtime function with the specified | |||
4276 | /// type and name. | |||
4277 | llvm::FunctionCallee | |||
4278 | CodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, StringRef Name, | |||
4279 | llvm::AttributeList ExtraAttrs, bool Local, | |||
4280 | bool AssumeConvergent) { | |||
4281 | if (AssumeConvergent) { | |||
4282 | ExtraAttrs = | |||
4283 | ExtraAttrs.addFnAttribute(VMContext, llvm::Attribute::Convergent); | |||
4284 | } | |||
4285 | ||||
4286 | llvm::Constant *C = | |||
4287 | GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, | |||
4288 | /*DontDefer=*/false, /*IsThunk=*/false, | |||
4289 | ExtraAttrs); | |||
4290 | ||||
4291 | if (auto *F = dyn_cast<llvm::Function>(C)) { | |||
4292 | if (F->empty()) { | |||
4293 | F->setCallingConv(getRuntimeCC()); | |||
4294 | ||||
4295 | // In Windows Itanium environments, try to mark runtime functions | |||
4296 | // dllimport. For Mingw and MSVC, don't. We don't really know if the user | |||
4297 | // will link their standard library statically or dynamically. Marking | |||
4298 | // functions imported when they are not imported can cause linker errors | |||
4299 | // and warnings. | |||
4300 | if (!Local && getTriple().isWindowsItaniumEnvironment() && | |||
4301 | !getCodeGenOpts().LTOVisibilityPublicStd) { | |||
4302 | const FunctionDecl *FD = GetRuntimeFunctionDecl(Context, Name); | |||
4303 | if (!FD || FD->hasAttr<DLLImportAttr>()) { | |||
4304 | F->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); | |||
4305 | F->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
4306 | } | |||
4307 | } | |||
4308 | setDSOLocal(F); | |||
4309 | } | |||
4310 | } | |||
4311 | ||||
4312 | return {FTy, C}; | |||
4313 | } | |||
4314 | ||||
4315 | /// isTypeConstant - Determine whether an object of this type can be emitted | |||
4316 | /// as a constant. | |||
4317 | /// | |||
4318 | /// If ExcludeCtor is true, the duration when the object's constructor runs | |||
4319 | /// will not be considered. The caller will need to verify that the object is | |||
4320 | /// not written to during its construction. | |||
4321 | bool CodeGenModule::isTypeConstant(QualType Ty, bool ExcludeCtor) { | |||
4322 | if (!Ty.isConstant(Context) && !Ty->isReferenceType()) | |||
4323 | return false; | |||
4324 | ||||
4325 | if (Context.getLangOpts().CPlusPlus) { | |||
4326 | if (const CXXRecordDecl *Record | |||
4327 | = Context.getBaseElementType(Ty)->getAsCXXRecordDecl()) | |||
4328 | return ExcludeCtor && !Record->hasMutableFields() && | |||
4329 | Record->hasTrivialDestructor(); | |||
4330 | } | |||
4331 | ||||
4332 | return true; | |||
4333 | } | |||
4334 | ||||
4335 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, | |||
4336 | /// create and return an llvm GlobalVariable with the specified type and address | |||
4337 | /// space. If there is something in the module with the specified name, return | |||
4338 | /// it potentially bitcasted to the right type. | |||
4339 | /// | |||
4340 | /// If D is non-null, it specifies a decl that correspond to this. This is used | |||
4341 | /// to set the attributes on the global when it is first created. | |||
4342 | /// | |||
4343 | /// If IsForDefinition is true, it is guaranteed that an actual global with | |||
4344 | /// type Ty will be returned, not conversion of a variable with the same | |||
4345 | /// mangled name but some other type. | |||
4346 | llvm::Constant * | |||
4347 | CodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, llvm::Type *Ty, | |||
4348 | LangAS AddrSpace, const VarDecl *D, | |||
4349 | ForDefinition_t IsForDefinition) { | |||
4350 | // Lookup the entry, lazily creating it if necessary. | |||
4351 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
4352 | unsigned TargetAS = getContext().getTargetAddressSpace(AddrSpace); | |||
4353 | if (Entry) { | |||
4354 | if (WeakRefReferences.erase(Entry)) { | |||
4355 | if (D && !D->hasAttr<WeakAttr>()) | |||
4356 | Entry->setLinkage(llvm::Function::ExternalLinkage); | |||
4357 | } | |||
4358 | ||||
4359 | // Handle dropped DLL attributes. | |||
4360 | if (D && !D->hasAttr<DLLImportAttr>() && !D->hasAttr<DLLExportAttr>() && | |||
4361 | !shouldMapVisibilityToDLLExport(D)) | |||
4362 | Entry->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
4363 | ||||
4364 | if (LangOpts.OpenMP && !LangOpts.OpenMPSimd && D) | |||
4365 | getOpenMPRuntime().registerTargetGlobalVariable(D, Entry); | |||
4366 | ||||
4367 | if (Entry->getValueType() == Ty && Entry->getAddressSpace() == TargetAS) | |||
4368 | return Entry; | |||
4369 | ||||
4370 | // If there are two attempts to define the same mangled name, issue an | |||
4371 | // error. | |||
4372 | if (IsForDefinition && !Entry->isDeclaration()) { | |||
4373 | GlobalDecl OtherGD; | |||
4374 | const VarDecl *OtherD; | |||
4375 | ||||
4376 | // Check that D is not yet in DiagnosedConflictingDefinitions is required | |||
4377 | // to make sure that we issue an error only once. | |||
4378 | if (D && lookupRepresentativeDecl(MangledName, OtherGD) && | |||
4379 | (D->getCanonicalDecl() != OtherGD.getCanonicalDecl().getDecl()) && | |||
4380 | (OtherD = dyn_cast<VarDecl>(OtherGD.getDecl())) && | |||
4381 | OtherD->hasInit() && | |||
4382 | DiagnosedConflictingDefinitions.insert(D).second) { | |||
4383 | getDiags().Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
4384 | << MangledName; | |||
4385 | getDiags().Report(OtherGD.getDecl()->getLocation(), | |||
4386 | diag::note_previous_definition); | |||
4387 | } | |||
4388 | } | |||
4389 | ||||
4390 | // Make sure the result is of the correct type. | |||
4391 | if (Entry->getType()->getAddressSpace() != TargetAS) { | |||
4392 | return llvm::ConstantExpr::getAddrSpaceCast(Entry, | |||
4393 | Ty->getPointerTo(TargetAS)); | |||
4394 | } | |||
4395 | ||||
4396 | // (If global is requested for a definition, we always need to create a new | |||
4397 | // global, not just return a bitcast.) | |||
4398 | if (!IsForDefinition) | |||
4399 | return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo(TargetAS)); | |||
4400 | } | |||
4401 | ||||
4402 | auto DAddrSpace = GetGlobalVarAddressSpace(D); | |||
4403 | ||||
4404 | auto *GV = new llvm::GlobalVariable( | |||
4405 | getModule(), Ty, false, llvm::GlobalValue::ExternalLinkage, nullptr, | |||
4406 | MangledName, nullptr, llvm::GlobalVariable::NotThreadLocal, | |||
4407 | getContext().getTargetAddressSpace(DAddrSpace)); | |||
4408 | ||||
4409 | // If we already created a global with the same mangled name (but different | |||
4410 | // type) before, take its name and remove it from its parent. | |||
4411 | if (Entry) { | |||
4412 | GV->takeName(Entry); | |||
4413 | ||||
4414 | if (!Entry->use_empty()) { | |||
4415 | llvm::Constant *NewPtrForOldDecl = | |||
4416 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); | |||
4417 | Entry->replaceAllUsesWith(NewPtrForOldDecl); | |||
4418 | } | |||
4419 | ||||
4420 | Entry->eraseFromParent(); | |||
4421 | } | |||
4422 | ||||
4423 | // This is the first use or definition of a mangled name. If there is a | |||
4424 | // deferred decl with this name, remember that we need to emit it at the end | |||
4425 | // of the file. | |||
4426 | auto DDI = DeferredDecls.find(MangledName); | |||
4427 | if (DDI != DeferredDecls.end()) { | |||
4428 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit | |||
4429 | // list, and remove it from DeferredDecls (since we don't need it anymore). | |||
4430 | addDeferredDeclToEmit(DDI->second); | |||
4431 | EmittedDeferredDecls[DDI->first] = DDI->second; | |||
4432 | DeferredDecls.erase(DDI); | |||
4433 | } | |||
4434 | ||||
4435 | // Handle things which are present even on external declarations. | |||
4436 | if (D) { | |||
4437 | if (LangOpts.OpenMP && !LangOpts.OpenMPSimd) | |||
4438 | getOpenMPRuntime().registerTargetGlobalVariable(D, GV); | |||
4439 | ||||
4440 | // FIXME: This code is overly simple and should be merged with other global | |||
4441 | // handling. | |||
4442 | GV->setConstant(isTypeConstant(D->getType(), false)); | |||
4443 | ||||
4444 | GV->setAlignment(getContext().getDeclAlign(D).getAsAlign()); | |||
4445 | ||||
4446 | setLinkageForGV(GV, D); | |||
4447 | ||||
4448 | if (D->getTLSKind()) { | |||
4449 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) | |||
4450 | CXXThreadLocals.push_back(D); | |||
4451 | setTLSMode(GV, *D); | |||
4452 | } | |||
4453 | ||||
4454 | setGVProperties(GV, D); | |||
4455 | ||||
4456 | // If required by the ABI, treat declarations of static data members with | |||
4457 | // inline initializers as definitions. | |||
4458 | if (getContext().isMSStaticDataMemberInlineDefinition(D)) { | |||
4459 | EmitGlobalVarDefinition(D); | |||
4460 | } | |||
4461 | ||||
4462 | // Emit section information for extern variables. | |||
4463 | if (D->hasExternalStorage()) { | |||
4464 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) | |||
4465 | GV->setSection(SA->getName()); | |||
4466 | } | |||
4467 | ||||
4468 | // Handle XCore specific ABI requirements. | |||
4469 | if (getTriple().getArch() == llvm::Triple::xcore && | |||
4470 | D->getLanguageLinkage() == CLanguageLinkage && | |||
4471 | D->getType().isConstant(Context) && | |||
4472 | isExternallyVisible(D->getLinkageAndVisibility().getLinkage())) | |||
4473 | GV->setSection(".cp.rodata"); | |||
4474 | ||||
4475 | // Check if we a have a const declaration with an initializer, we may be | |||
4476 | // able to emit it as available_externally to expose it's value to the | |||
4477 | // optimizer. | |||
4478 | if (Context.getLangOpts().CPlusPlus && GV->hasExternalLinkage() && | |||
4479 | D->getType().isConstQualified() && !GV->hasInitializer() && | |||
4480 | !D->hasDefinition() && D->hasInit() && !D->hasAttr<DLLImportAttr>()) { | |||
4481 | const auto *Record = | |||
4482 | Context.getBaseElementType(D->getType())->getAsCXXRecordDecl(); | |||
4483 | bool HasMutableFields = Record && Record->hasMutableFields(); | |||
4484 | if (!HasMutableFields) { | |||
4485 | const VarDecl *InitDecl; | |||
4486 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); | |||
4487 | if (InitExpr) { | |||
4488 | ConstantEmitter emitter(*this); | |||
4489 | llvm::Constant *Init = emitter.tryEmitForInitializer(*InitDecl); | |||
4490 | if (Init) { | |||
4491 | auto *InitType = Init->getType(); | |||
4492 | if (GV->getValueType() != InitType) { | |||
4493 | // The type of the initializer does not match the definition. | |||
4494 | // This happens when an initializer has a different type from | |||
4495 | // the type of the global (because of padding at the end of a | |||
4496 | // structure for instance). | |||
4497 | GV->setName(StringRef()); | |||
4498 | // Make a new global with the correct type, this is now guaranteed | |||
4499 | // to work. | |||
4500 | auto *NewGV = cast<llvm::GlobalVariable>( | |||
4501 | GetAddrOfGlobalVar(D, InitType, IsForDefinition) | |||
4502 | ->stripPointerCasts()); | |||
4503 | ||||
4504 | // Erase the old global, since it is no longer used. | |||
4505 | GV->eraseFromParent(); | |||
4506 | GV = NewGV; | |||
4507 | } else { | |||
4508 | GV->setInitializer(Init); | |||
4509 | GV->setConstant(true); | |||
4510 | GV->setLinkage(llvm::GlobalValue::AvailableExternallyLinkage); | |||
4511 | } | |||
4512 | emitter.finalize(GV); | |||
4513 | } | |||
4514 | } | |||
4515 | } | |||
4516 | } | |||
4517 | } | |||
4518 | ||||
4519 | if (GV->isDeclaration()) { | |||
4520 | getTargetCodeGenInfo().setTargetAttributes(D, GV, *this); | |||
4521 | // External HIP managed variables needed to be recorded for transformation | |||
4522 | // in both device and host compilations. | |||
4523 | if (getLangOpts().CUDA && D && D->hasAttr<HIPManagedAttr>() && | |||
4524 | D->hasExternalStorage()) | |||
4525 | getCUDARuntime().handleVarRegistration(D, *GV); | |||
4526 | } | |||
4527 | ||||
4528 | if (D) | |||
4529 | SanitizerMD->reportGlobal(GV, *D); | |||
4530 | ||||
4531 | LangAS ExpectedAS = | |||
4532 | D ? D->getType().getAddressSpace() | |||
4533 | : (LangOpts.OpenCL ? LangAS::opencl_global : LangAS::Default); | |||
4534 | assert(getContext().getTargetAddressSpace(ExpectedAS) == TargetAS)(static_cast <bool> (getContext().getTargetAddressSpace (ExpectedAS) == TargetAS) ? void (0) : __assert_fail ("getContext().getTargetAddressSpace(ExpectedAS) == TargetAS" , "clang/lib/CodeGen/CodeGenModule.cpp", 4534, __extension__ __PRETTY_FUNCTION__ )); | |||
4535 | if (DAddrSpace != ExpectedAS) { | |||
4536 | return getTargetCodeGenInfo().performAddrSpaceCast( | |||
4537 | *this, GV, DAddrSpace, ExpectedAS, Ty->getPointerTo(TargetAS)); | |||
4538 | } | |||
4539 | ||||
4540 | return GV; | |||
4541 | } | |||
4542 | ||||
4543 | llvm::Constant * | |||
4544 | CodeGenModule::GetAddrOfGlobal(GlobalDecl GD, ForDefinition_t IsForDefinition) { | |||
4545 | const Decl *D = GD.getDecl(); | |||
4546 | ||||
4547 | if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) | |||
4548 | return getAddrOfCXXStructor(GD, /*FnInfo=*/nullptr, /*FnType=*/nullptr, | |||
4549 | /*DontDefer=*/false, IsForDefinition); | |||
4550 | ||||
4551 | if (isa<CXXMethodDecl>(D)) { | |||
4552 | auto FInfo = | |||
4553 | &getTypes().arrangeCXXMethodDeclaration(cast<CXXMethodDecl>(D)); | |||
4554 | auto Ty = getTypes().GetFunctionType(*FInfo); | |||
4555 | return GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, /*DontDefer=*/false, | |||
4556 | IsForDefinition); | |||
4557 | } | |||
4558 | ||||
4559 | if (isa<FunctionDecl>(D)) { | |||
4560 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
4561 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
4562 | return GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, /*DontDefer=*/false, | |||
4563 | IsForDefinition); | |||
4564 | } | |||
4565 | ||||
4566 | return GetAddrOfGlobalVar(cast<VarDecl>(D), /*Ty=*/nullptr, IsForDefinition); | |||
4567 | } | |||
4568 | ||||
4569 | llvm::GlobalVariable *CodeGenModule::CreateOrReplaceCXXRuntimeVariable( | |||
4570 | StringRef Name, llvm::Type *Ty, llvm::GlobalValue::LinkageTypes Linkage, | |||
4571 | llvm::Align Alignment) { | |||
4572 | llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); | |||
4573 | llvm::GlobalVariable *OldGV = nullptr; | |||
4574 | ||||
4575 | if (GV) { | |||
4576 | // Check if the variable has the right type. | |||
4577 | if (GV->getValueType() == Ty) | |||
4578 | return GV; | |||
4579 | ||||
4580 | // Because C++ name mangling, the only way we can end up with an already | |||
4581 | // existing global with the same name is if it has been declared extern "C". | |||
4582 | assert(GV->isDeclaration() && "Declaration has wrong type!")(static_cast <bool> (GV->isDeclaration() && "Declaration has wrong type!" ) ? void (0) : __assert_fail ("GV->isDeclaration() && \"Declaration has wrong type!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4582, __extension__ __PRETTY_FUNCTION__ )); | |||
4583 | OldGV = GV; | |||
4584 | } | |||
4585 | ||||
4586 | // Create a new variable. | |||
4587 | GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, | |||
4588 | Linkage, nullptr, Name); | |||
4589 | ||||
4590 | if (OldGV) { | |||
4591 | // Replace occurrences of the old variable if needed. | |||
4592 | GV->takeName(OldGV); | |||
4593 | ||||
4594 | if (!OldGV->use_empty()) { | |||
4595 | llvm::Constant *NewPtrForOldDecl = | |||
4596 | llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); | |||
4597 | OldGV->replaceAllUsesWith(NewPtrForOldDecl); | |||
4598 | } | |||
4599 | ||||
4600 | OldGV->eraseFromParent(); | |||
4601 | } | |||
4602 | ||||
4603 | if (supportsCOMDAT() && GV->isWeakForLinker() && | |||
4604 | !GV->hasAvailableExternallyLinkage()) | |||
4605 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
4606 | ||||
4607 | GV->setAlignment(Alignment); | |||
4608 | ||||
4609 | return GV; | |||
4610 | } | |||
4611 | ||||
4612 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the | |||
4613 | /// given global variable. If Ty is non-null and if the global doesn't exist, | |||
4614 | /// then it will be created with the specified type instead of whatever the | |||
4615 | /// normal requested type would be. If IsForDefinition is true, it is guaranteed | |||
4616 | /// that an actual global with type Ty will be returned, not conversion of a | |||
4617 | /// variable with the same mangled name but some other type. | |||
4618 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, | |||
4619 | llvm::Type *Ty, | |||
4620 | ForDefinition_t IsForDefinition) { | |||
4621 | assert(D->hasGlobalStorage() && "Not a global variable")(static_cast <bool> (D->hasGlobalStorage() && "Not a global variable") ? void (0) : __assert_fail ("D->hasGlobalStorage() && \"Not a global variable\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4621, __extension__ __PRETTY_FUNCTION__ )); | |||
4622 | QualType ASTTy = D->getType(); | |||
4623 | if (!Ty) | |||
4624 | Ty = getTypes().ConvertTypeForMem(ASTTy); | |||
4625 | ||||
4626 | StringRef MangledName = getMangledName(D); | |||
4627 | return GetOrCreateLLVMGlobal(MangledName, Ty, ASTTy.getAddressSpace(), D, | |||
4628 | IsForDefinition); | |||
4629 | } | |||
4630 | ||||
4631 | /// CreateRuntimeVariable - Create a new runtime global variable with the | |||
4632 | /// specified type and name. | |||
4633 | llvm::Constant * | |||
4634 | CodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, | |||
4635 | StringRef Name) { | |||
4636 | LangAS AddrSpace = getContext().getLangOpts().OpenCL ? LangAS::opencl_global | |||
4637 | : LangAS::Default; | |||
4638 | auto *Ret = GetOrCreateLLVMGlobal(Name, Ty, AddrSpace, nullptr); | |||
4639 | setDSOLocal(cast<llvm::GlobalValue>(Ret->stripPointerCasts())); | |||
4640 | return Ret; | |||
4641 | } | |||
4642 | ||||
4643 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { | |||
4644 | assert(!D->getInit() && "Cannot emit definite definitions here!")(static_cast <bool> (!D->getInit() && "Cannot emit definite definitions here!" ) ? void (0) : __assert_fail ("!D->getInit() && \"Cannot emit definite definitions here!\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4644, __extension__ __PRETTY_FUNCTION__ )); | |||
4645 | ||||
4646 | StringRef MangledName = getMangledName(D); | |||
4647 | llvm::GlobalValue *GV = GetGlobalValue(MangledName); | |||
4648 | ||||
4649 | // We already have a definition, not declaration, with the same mangled name. | |||
4650 | // Emitting of declaration is not required (and actually overwrites emitted | |||
4651 | // definition). | |||
4652 | if (GV && !GV->isDeclaration()) | |||
4653 | return; | |||
4654 | ||||
4655 | // If we have not seen a reference to this variable yet, place it into the | |||
4656 | // deferred declarations table to be emitted if needed later. | |||
4657 | if (!MustBeEmitted(D) && !GV) { | |||
4658 | DeferredDecls[MangledName] = D; | |||
4659 | return; | |||
4660 | } | |||
4661 | ||||
4662 | // The tentative definition is the only definition. | |||
4663 | EmitGlobalVarDefinition(D); | |||
4664 | } | |||
4665 | ||||
4666 | void CodeGenModule::EmitExternalDeclaration(const VarDecl *D) { | |||
4667 | EmitExternalVarDeclaration(D); | |||
4668 | } | |||
4669 | ||||
4670 | CharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { | |||
4671 | return Context.toCharUnitsFromBits( | |||
4672 | getDataLayout().getTypeStoreSizeInBits(Ty)); | |||
4673 | } | |||
4674 | ||||
4675 | LangAS CodeGenModule::GetGlobalVarAddressSpace(const VarDecl *D) { | |||
4676 | if (LangOpts.OpenCL) { | |||
4677 | LangAS AS = D ? D->getType().getAddressSpace() : LangAS::opencl_global; | |||
4678 | assert(AS == LangAS::opencl_global ||(static_cast <bool> (AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace) ? void (0) : __assert_fail ("AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace" , "clang/lib/CodeGen/CodeGenModule.cpp", 4683, __extension__ __PRETTY_FUNCTION__ )) | |||
4679 | AS == LangAS::opencl_global_device ||(static_cast <bool> (AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace) ? void (0) : __assert_fail ("AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace" , "clang/lib/CodeGen/CodeGenModule.cpp", 4683, __extension__ __PRETTY_FUNCTION__ )) | |||
4680 | AS == LangAS::opencl_global_host ||(static_cast <bool> (AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace) ? void (0) : __assert_fail ("AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace" , "clang/lib/CodeGen/CodeGenModule.cpp", 4683, __extension__ __PRETTY_FUNCTION__ )) | |||
4681 | AS == LangAS::opencl_constant ||(static_cast <bool> (AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace) ? void (0) : __assert_fail ("AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace" , "clang/lib/CodeGen/CodeGenModule.cpp", 4683, __extension__ __PRETTY_FUNCTION__ )) | |||
4682 | AS == LangAS::opencl_local ||(static_cast <bool> (AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace) ? void (0) : __assert_fail ("AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace" , "clang/lib/CodeGen/CodeGenModule.cpp", 4683, __extension__ __PRETTY_FUNCTION__ )) | |||
4683 | AS >= LangAS::FirstTargetAddressSpace)(static_cast <bool> (AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace) ? void (0) : __assert_fail ("AS == LangAS::opencl_global || AS == LangAS::opencl_global_device || AS == LangAS::opencl_global_host || AS == LangAS::opencl_constant || AS == LangAS::opencl_local || AS >= LangAS::FirstTargetAddressSpace" , "clang/lib/CodeGen/CodeGenModule.cpp", 4683, __extension__ __PRETTY_FUNCTION__ )); | |||
4684 | return AS; | |||
4685 | } | |||
4686 | ||||
4687 | if (LangOpts.SYCLIsDevice && | |||
4688 | (!D || D->getType().getAddressSpace() == LangAS::Default)) | |||
4689 | return LangAS::sycl_global; | |||
4690 | ||||
4691 | if (LangOpts.CUDA && LangOpts.CUDAIsDevice) { | |||
4692 | if (D) { | |||
4693 | if (D->hasAttr<CUDAConstantAttr>()) | |||
4694 | return LangAS::cuda_constant; | |||
4695 | if (D->hasAttr<CUDASharedAttr>()) | |||
4696 | return LangAS::cuda_shared; | |||
4697 | if (D->hasAttr<CUDADeviceAttr>()) | |||
4698 | return LangAS::cuda_device; | |||
4699 | if (D->getType().isConstQualified()) | |||
4700 | return LangAS::cuda_constant; | |||
4701 | } | |||
4702 | return LangAS::cuda_device; | |||
4703 | } | |||
4704 | ||||
4705 | if (LangOpts.OpenMP) { | |||
4706 | LangAS AS; | |||
4707 | if (OpenMPRuntime->hasAllocateAttributeForGlobalVar(D, AS)) | |||
4708 | return AS; | |||
4709 | } | |||
4710 | return getTargetCodeGenInfo().getGlobalVarAddressSpace(*this, D); | |||
4711 | } | |||
4712 | ||||
4713 | LangAS CodeGenModule::GetGlobalConstantAddressSpace() const { | |||
4714 | // OpenCL v1.2 s6.5.3: a string literal is in the constant address space. | |||
4715 | if (LangOpts.OpenCL) | |||
4716 | return LangAS::opencl_constant; | |||
4717 | if (LangOpts.SYCLIsDevice) | |||
4718 | return LangAS::sycl_global; | |||
4719 | if (LangOpts.HIP && LangOpts.CUDAIsDevice && getTriple().isSPIRV()) | |||
4720 | // For HIPSPV map literals to cuda_device (maps to CrossWorkGroup in SPIR-V) | |||
4721 | // instead of default AS (maps to Generic in SPIR-V). Otherwise, we end up | |||
4722 | // with OpVariable instructions with Generic storage class which is not | |||
4723 | // allowed (SPIR-V V1.6 s3.42.8). Also, mapping literals to SPIR-V | |||
4724 | // UniformConstant storage class is not viable as pointers to it may not be | |||
4725 | // casted to Generic pointers which are used to model HIP's "flat" pointers. | |||
4726 | return LangAS::cuda_device; | |||
4727 | if (auto AS = getTarget().getConstantAddressSpace()) | |||
4728 | return *AS; | |||
4729 | return LangAS::Default; | |||
4730 | } | |||
4731 | ||||
4732 | // In address space agnostic languages, string literals are in default address | |||
4733 | // space in AST. However, certain targets (e.g. amdgcn) request them to be | |||
4734 | // emitted in constant address space in LLVM IR. To be consistent with other | |||
4735 | // parts of AST, string literal global variables in constant address space | |||
4736 | // need to be casted to default address space before being put into address | |||
4737 | // map and referenced by other part of CodeGen. | |||
4738 | // In OpenCL, string literals are in constant address space in AST, therefore | |||
4739 | // they should not be casted to default address space. | |||
4740 | static llvm::Constant * | |||
4741 | castStringLiteralToDefaultAddressSpace(CodeGenModule &CGM, | |||
4742 | llvm::GlobalVariable *GV) { | |||
4743 | llvm::Constant *Cast = GV; | |||
4744 | if (!CGM.getLangOpts().OpenCL) { | |||
4745 | auto AS = CGM.GetGlobalConstantAddressSpace(); | |||
4746 | if (AS != LangAS::Default) | |||
4747 | Cast = CGM.getTargetCodeGenInfo().performAddrSpaceCast( | |||
4748 | CGM, GV, AS, LangAS::Default, | |||
4749 | GV->getValueType()->getPointerTo( | |||
4750 | CGM.getContext().getTargetAddressSpace(LangAS::Default))); | |||
4751 | } | |||
4752 | return Cast; | |||
4753 | } | |||
4754 | ||||
4755 | template<typename SomeDecl> | |||
4756 | void CodeGenModule::MaybeHandleStaticInExternC(const SomeDecl *D, | |||
4757 | llvm::GlobalValue *GV) { | |||
4758 | if (!getLangOpts().CPlusPlus) | |||
4759 | return; | |||
4760 | ||||
4761 | // Must have 'used' attribute, or else inline assembly can't rely on | |||
4762 | // the name existing. | |||
4763 | if (!D->template hasAttr<UsedAttr>()) | |||
4764 | return; | |||
4765 | ||||
4766 | // Must have internal linkage and an ordinary name. | |||
4767 | if (!D->getIdentifier() || D->getFormalLinkage() != InternalLinkage) | |||
4768 | return; | |||
4769 | ||||
4770 | // Must be in an extern "C" context. Entities declared directly within | |||
4771 | // a record are not extern "C" even if the record is in such a context. | |||
4772 | const SomeDecl *First = D->getFirstDecl(); | |||
4773 | if (First->getDeclContext()->isRecord() || !First->isInExternCContext()) | |||
4774 | return; | |||
4775 | ||||
4776 | // OK, this is an internal linkage entity inside an extern "C" linkage | |||
4777 | // specification. Make a note of that so we can give it the "expected" | |||
4778 | // mangled name if nothing else is using that name. | |||
4779 | std::pair<StaticExternCMap::iterator, bool> R = | |||
4780 | StaticExternCValues.insert(std::make_pair(D->getIdentifier(), GV)); | |||
4781 | ||||
4782 | // If we have multiple internal linkage entities with the same name | |||
4783 | // in extern "C" regions, none of them gets that name. | |||
4784 | if (!R.second) | |||
4785 | R.first->second = nullptr; | |||
4786 | } | |||
4787 | ||||
4788 | static bool shouldBeInCOMDAT(CodeGenModule &CGM, const Decl &D) { | |||
4789 | if (!CGM.supportsCOMDAT()) | |||
4790 | return false; | |||
4791 | ||||
4792 | if (D.hasAttr<SelectAnyAttr>()) | |||
4793 | return true; | |||
4794 | ||||
4795 | GVALinkage Linkage; | |||
4796 | if (auto *VD = dyn_cast<VarDecl>(&D)) | |||
4797 | Linkage = CGM.getContext().GetGVALinkageForVariable(VD); | |||
4798 | else | |||
4799 | Linkage = CGM.getContext().GetGVALinkageForFunction(cast<FunctionDecl>(&D)); | |||
4800 | ||||
4801 | switch (Linkage) { | |||
4802 | case GVA_Internal: | |||
4803 | case GVA_AvailableExternally: | |||
4804 | case GVA_StrongExternal: | |||
4805 | return false; | |||
4806 | case GVA_DiscardableODR: | |||
4807 | case GVA_StrongODR: | |||
4808 | return true; | |||
4809 | } | |||
4810 | llvm_unreachable("No such linkage")::llvm::llvm_unreachable_internal("No such linkage", "clang/lib/CodeGen/CodeGenModule.cpp" , 4810); | |||
4811 | } | |||
4812 | ||||
4813 | void CodeGenModule::maybeSetTrivialComdat(const Decl &D, | |||
4814 | llvm::GlobalObject &GO) { | |||
4815 | if (!shouldBeInCOMDAT(*this, D)) | |||
4816 | return; | |||
4817 | GO.setComdat(TheModule.getOrInsertComdat(GO.getName())); | |||
4818 | } | |||
4819 | ||||
4820 | /// Pass IsTentative as true if you want to create a tentative definition. | |||
4821 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D, | |||
4822 | bool IsTentative) { | |||
4823 | // OpenCL global variables of sampler type are translated to function calls, | |||
4824 | // therefore no need to be translated. | |||
4825 | QualType ASTTy = D->getType(); | |||
4826 | if (getLangOpts().OpenCL && ASTTy->isSamplerT()) | |||
4827 | return; | |||
4828 | ||||
4829 | // If this is OpenMP device, check if it is legal to emit this global | |||
4830 | // normally. | |||
4831 | if (LangOpts.OpenMPIsDevice && OpenMPRuntime && | |||
4832 | OpenMPRuntime->emitTargetGlobalVariable(D)) | |||
4833 | return; | |||
4834 | ||||
4835 | llvm::TrackingVH<llvm::Constant> Init; | |||
4836 | bool NeedsGlobalCtor = false; | |||
4837 | // Whether the definition of the variable is available externally. | |||
4838 | // If yes, we shouldn't emit the GloablCtor and GlobalDtor for the variable | |||
4839 | // since this is the job for its original source. | |||
4840 | bool IsDefinitionAvailableExternally = | |||
4841 | getContext().GetGVALinkageForVariable(D) == GVA_AvailableExternally; | |||
4842 | bool NeedsGlobalDtor = | |||
4843 | !IsDefinitionAvailableExternally && | |||
4844 | D->needsDestruction(getContext()) == QualType::DK_cxx_destructor; | |||
4845 | ||||
4846 | const VarDecl *InitDecl; | |||
4847 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); | |||
4848 | ||||
4849 | std::optional<ConstantEmitter> emitter; | |||
4850 | ||||
4851 | // CUDA E.2.4.1 "__shared__ variables cannot have an initialization | |||
4852 | // as part of their declaration." Sema has already checked for | |||
4853 | // error cases, so we just need to set Init to UndefValue. | |||
4854 | bool IsCUDASharedVar = | |||
4855 | getLangOpts().CUDAIsDevice && D->hasAttr<CUDASharedAttr>(); | |||
4856 | // Shadows of initialized device-side global variables are also left | |||
4857 | // undefined. | |||
4858 | // Managed Variables should be initialized on both host side and device side. | |||
4859 | bool IsCUDAShadowVar = | |||
4860 | !getLangOpts().CUDAIsDevice && !D->hasAttr<HIPManagedAttr>() && | |||
4861 | (D->hasAttr<CUDAConstantAttr>() || D->hasAttr<CUDADeviceAttr>() || | |||
4862 | D->hasAttr<CUDASharedAttr>()); | |||
4863 | bool IsCUDADeviceShadowVar = | |||
4864 | getLangOpts().CUDAIsDevice && !D->hasAttr<HIPManagedAttr>() && | |||
4865 | (D->getType()->isCUDADeviceBuiltinSurfaceType() || | |||
4866 | D->getType()->isCUDADeviceBuiltinTextureType()); | |||
4867 | if (getLangOpts().CUDA && | |||
4868 | (IsCUDASharedVar || IsCUDAShadowVar || IsCUDADeviceShadowVar)) | |||
4869 | Init = llvm::UndefValue::get(getTypes().ConvertTypeForMem(ASTTy)); | |||
4870 | else if (D->hasAttr<LoaderUninitializedAttr>()) | |||
4871 | Init = llvm::UndefValue::get(getTypes().ConvertTypeForMem(ASTTy)); | |||
4872 | else if (!InitExpr) { | |||
4873 | // This is a tentative definition; tentative definitions are | |||
4874 | // implicitly initialized with { 0 }. | |||
4875 | // | |||
4876 | // Note that tentative definitions are only emitted at the end of | |||
4877 | // a translation unit, so they should never have incomplete | |||
4878 | // type. In addition, EmitTentativeDefinition makes sure that we | |||
4879 | // never attempt to emit a tentative definition if a real one | |||
4880 | // exists. A use may still exists, however, so we still may need | |||
4881 | // to do a RAUW. | |||
4882 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type")(static_cast <bool> (!ASTTy->isIncompleteType() && "Unexpected incomplete type") ? void (0) : __assert_fail ("!ASTTy->isIncompleteType() && \"Unexpected incomplete type\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4882, __extension__ __PRETTY_FUNCTION__ )); | |||
4883 | Init = EmitNullConstant(D->getType()); | |||
4884 | } else { | |||
4885 | initializedGlobalDecl = GlobalDecl(D); | |||
4886 | emitter.emplace(*this); | |||
4887 | llvm::Constant *Initializer = emitter->tryEmitForInitializer(*InitDecl); | |||
4888 | if (!Initializer) { | |||
4889 | QualType T = InitExpr->getType(); | |||
4890 | if (D->getType()->isReferenceType()) | |||
4891 | T = D->getType(); | |||
4892 | ||||
4893 | if (getLangOpts().CPlusPlus) { | |||
4894 | if (InitDecl->hasFlexibleArrayInit(getContext())) | |||
4895 | ErrorUnsupported(D, "flexible array initializer"); | |||
4896 | Init = EmitNullConstant(T); | |||
4897 | ||||
4898 | if (!IsDefinitionAvailableExternally) | |||
4899 | NeedsGlobalCtor = true; | |||
4900 | } else { | |||
4901 | ErrorUnsupported(D, "static initializer"); | |||
4902 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); | |||
4903 | } | |||
4904 | } else { | |||
4905 | Init = Initializer; | |||
4906 | // We don't need an initializer, so remove the entry for the delayed | |||
4907 | // initializer position (just in case this entry was delayed) if we | |||
4908 | // also don't need to register a destructor. | |||
4909 | if (getLangOpts().CPlusPlus && !NeedsGlobalDtor) | |||
4910 | DelayedCXXInitPosition.erase(D); | |||
4911 | ||||
4912 | #ifndef NDEBUG | |||
4913 | CharUnits VarSize = getContext().getTypeSizeInChars(ASTTy) + | |||
4914 | InitDecl->getFlexibleArrayInitChars(getContext()); | |||
4915 | CharUnits CstSize = CharUnits::fromQuantity( | |||
4916 | getDataLayout().getTypeAllocSize(Init->getType())); | |||
4917 | assert(VarSize == CstSize && "Emitted constant has unexpected size")(static_cast <bool> (VarSize == CstSize && "Emitted constant has unexpected size" ) ? void (0) : __assert_fail ("VarSize == CstSize && \"Emitted constant has unexpected size\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 4917, __extension__ __PRETTY_FUNCTION__ )); | |||
4918 | #endif | |||
4919 | } | |||
4920 | } | |||
4921 | ||||
4922 | llvm::Type* InitType = Init->getType(); | |||
4923 | llvm::Constant *Entry = | |||
4924 | GetAddrOfGlobalVar(D, InitType, ForDefinition_t(!IsTentative)); | |||
4925 | ||||
4926 | // Strip off pointer casts if we got them. | |||
4927 | Entry = Entry->stripPointerCasts(); | |||
4928 | ||||
4929 | // Entry is now either a Function or GlobalVariable. | |||
4930 | auto *GV = dyn_cast<llvm::GlobalVariable>(Entry); | |||
4931 | ||||
4932 | // We have a definition after a declaration with the wrong type. | |||
4933 | // We must make a new GlobalVariable* and update everything that used OldGV | |||
4934 | // (a declaration or tentative definition) with the new GlobalVariable* | |||
4935 | // (which will be a definition). | |||
4936 | // | |||
4937 | // This happens if there is a prototype for a global (e.g. | |||
4938 | // "extern int x[];") and then a definition of a different type (e.g. | |||
4939 | // "int x[10];"). This also happens when an initializer has a different type | |||
4940 | // from the type of the global (this happens with unions). | |||
4941 | if (!GV || GV->getValueType() != InitType || | |||
4942 | GV->getType()->getAddressSpace() != | |||
4943 | getContext().getTargetAddressSpace(GetGlobalVarAddressSpace(D))) { | |||
4944 | ||||
4945 | // Move the old entry aside so that we'll create a new one. | |||
4946 | Entry->setName(StringRef()); | |||
4947 | ||||
4948 | // Make a new global with the correct type, this is now guaranteed to work. | |||
4949 | GV = cast<llvm::GlobalVariable>( | |||
4950 | GetAddrOfGlobalVar(D, InitType, ForDefinition_t(!IsTentative)) | |||
4951 | ->stripPointerCasts()); | |||
4952 | ||||
4953 | // Replace all uses of the old global with the new global | |||
4954 | llvm::Constant *NewPtrForOldDecl = | |||
4955 | llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, | |||
4956 | Entry->getType()); | |||
4957 | Entry->replaceAllUsesWith(NewPtrForOldDecl); | |||
4958 | ||||
4959 | // Erase the old global, since it is no longer used. | |||
4960 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); | |||
4961 | } | |||
4962 | ||||
4963 | MaybeHandleStaticInExternC(D, GV); | |||
4964 | ||||
4965 | if (D->hasAttr<AnnotateAttr>()) | |||
4966 | AddGlobalAnnotations(D, GV); | |||
4967 | ||||
4968 | // Set the llvm linkage type as appropriate. | |||
4969 | llvm::GlobalValue::LinkageTypes Linkage = | |||
4970 | getLLVMLinkageVarDefinition(D, GV->isConstant()); | |||
4971 | ||||
4972 | // CUDA B.2.1 "The __device__ qualifier declares a variable that resides on | |||
4973 | // the device. [...]" | |||
4974 | // CUDA B.2.2 "The __constant__ qualifier, optionally used together with | |||
4975 | // __device__, declares a variable that: [...] | |||
4976 | // Is accessible from all the threads within the grid and from the host | |||
4977 | // through the runtime library (cudaGetSymbolAddress() / cudaGetSymbolSize() | |||
4978 | // / cudaMemcpyToSymbol() / cudaMemcpyFromSymbol())." | |||
4979 | if (GV && LangOpts.CUDA) { | |||
4980 | if (LangOpts.CUDAIsDevice) { | |||
4981 | if (Linkage != llvm::GlobalValue::InternalLinkage && | |||
4982 | (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>() || | |||
4983 | D->getType()->isCUDADeviceBuiltinSurfaceType() || | |||
4984 | D->getType()->isCUDADeviceBuiltinTextureType())) | |||
4985 | GV->setExternallyInitialized(true); | |||
4986 | } else { | |||
4987 | getCUDARuntime().internalizeDeviceSideVar(D, Linkage); | |||
4988 | } | |||
4989 | getCUDARuntime().handleVarRegistration(D, *GV); | |||
4990 | } | |||
4991 | ||||
4992 | GV->setInitializer(Init); | |||
4993 | if (emitter) | |||
4994 | emitter->finalize(GV); | |||
4995 | ||||
4996 | // If it is safe to mark the global 'constant', do so now. | |||
4997 | GV->setConstant(!NeedsGlobalCtor && !NeedsGlobalDtor && | |||
4998 | isTypeConstant(D->getType(), true)); | |||
4999 | ||||
5000 | // If it is in a read-only section, mark it 'constant'. | |||
5001 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) { | |||
5002 | const ASTContext::SectionInfo &SI = Context.SectionInfos[SA->getName()]; | |||
5003 | if ((SI.SectionFlags & ASTContext::PSF_Write) == 0) | |||
5004 | GV->setConstant(true); | |||
5005 | } | |||
5006 | ||||
5007 | CharUnits AlignVal = getContext().getDeclAlign(D); | |||
5008 | // Check for alignment specifed in an 'omp allocate' directive. | |||
5009 | if (std::optional<CharUnits> AlignValFromAllocate = | |||
5010 | getOMPAllocateAlignment(D)) | |||
5011 | AlignVal = *AlignValFromAllocate; | |||
5012 | GV->setAlignment(AlignVal.getAsAlign()); | |||
5013 | ||||
5014 | // On Darwin, unlike other Itanium C++ ABI platforms, the thread-wrapper | |||
5015 | // function is only defined alongside the variable, not also alongside | |||
5016 | // callers. Normally, all accesses to a thread_local go through the | |||
5017 | // thread-wrapper in order to ensure initialization has occurred, underlying | |||
5018 | // variable will never be used other than the thread-wrapper, so it can be | |||
5019 | // converted to internal linkage. | |||
5020 | // | |||
5021 | // However, if the variable has the 'constinit' attribute, it _can_ be | |||
5022 | // referenced directly, without calling the thread-wrapper, so the linkage | |||
5023 | // must not be changed. | |||
5024 | // | |||
5025 | // Additionally, if the variable isn't plain external linkage, e.g. if it's | |||
5026 | // weak or linkonce, the de-duplication semantics are important to preserve, | |||
5027 | // so we don't change the linkage. | |||
5028 | if (D->getTLSKind() == VarDecl::TLS_Dynamic && | |||
5029 | Linkage == llvm::GlobalValue::ExternalLinkage && | |||
5030 | Context.getTargetInfo().getTriple().isOSDarwin() && | |||
5031 | !D->hasAttr<ConstInitAttr>()) | |||
5032 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
5033 | ||||
5034 | GV->setLinkage(Linkage); | |||
5035 | if (D->hasAttr<DLLImportAttr>()) | |||
5036 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLImportStorageClass); | |||
5037 | else if (D->hasAttr<DLLExportAttr>()) | |||
5038 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLExportStorageClass); | |||
5039 | else | |||
5040 | GV->setDLLStorageClass(llvm::GlobalVariable::DefaultStorageClass); | |||
5041 | ||||
5042 | if (Linkage == llvm::GlobalVariable::CommonLinkage) { | |||
5043 | // common vars aren't constant even if declared const. | |||
5044 | GV->setConstant(false); | |||
5045 | // Tentative definition of global variables may be initialized with | |||
5046 | // non-zero null pointers. In this case they should have weak linkage | |||
5047 | // since common linkage must have zero initializer and must not have | |||
5048 | // explicit section therefore cannot have non-zero initial value. | |||
5049 | if (!GV->getInitializer()->isNullValue()) | |||
5050 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); | |||
5051 | } | |||
5052 | ||||
5053 | setNonAliasAttributes(D, GV); | |||
5054 | ||||
5055 | if (D->getTLSKind() && !GV->isThreadLocal()) { | |||
5056 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) | |||
5057 | CXXThreadLocals.push_back(D); | |||
5058 | setTLSMode(GV, *D); | |||
5059 | } | |||
5060 | ||||
5061 | maybeSetTrivialComdat(*D, *GV); | |||
5062 | ||||
5063 | // Emit the initializer function if necessary. | |||
5064 | if (NeedsGlobalCtor || NeedsGlobalDtor) | |||
5065 | EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor); | |||
5066 | ||||
5067 | SanitizerMD->reportGlobal(GV, *D, NeedsGlobalCtor); | |||
5068 | ||||
5069 | // Emit global variable debug information. | |||
5070 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5071 | if (getCodeGenOpts().hasReducedDebugInfo()) | |||
5072 | DI->EmitGlobalVariable(GV, D); | |||
5073 | } | |||
5074 | ||||
5075 | void CodeGenModule::EmitExternalVarDeclaration(const VarDecl *D) { | |||
5076 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5077 | if (getCodeGenOpts().hasReducedDebugInfo()) { | |||
5078 | QualType ASTTy = D->getType(); | |||
5079 | llvm::Type *Ty = getTypes().ConvertTypeForMem(D->getType()); | |||
5080 | llvm::Constant *GV = | |||
5081 | GetOrCreateLLVMGlobal(D->getName(), Ty, ASTTy.getAddressSpace(), D); | |||
5082 | DI->EmitExternalVariable( | |||
5083 | cast<llvm::GlobalVariable>(GV->stripPointerCasts()), D); | |||
5084 | } | |||
5085 | } | |||
5086 | ||||
5087 | static bool isVarDeclStrongDefinition(const ASTContext &Context, | |||
5088 | CodeGenModule &CGM, const VarDecl *D, | |||
5089 | bool NoCommon) { | |||
5090 | // Don't give variables common linkage if -fno-common was specified unless it | |||
5091 | // was overridden by a NoCommon attribute. | |||
5092 | if ((NoCommon || D->hasAttr<NoCommonAttr>()) && !D->hasAttr<CommonAttr>()) | |||
5093 | return true; | |||
5094 | ||||
5095 | // C11 6.9.2/2: | |||
5096 | // A declaration of an identifier for an object that has file scope without | |||
5097 | // an initializer, and without a storage-class specifier or with the | |||
5098 | // storage-class specifier static, constitutes a tentative definition. | |||
5099 | if (D->getInit() || D->hasExternalStorage()) | |||
5100 | return true; | |||
5101 | ||||
5102 | // A variable cannot be both common and exist in a section. | |||
5103 | if (D->hasAttr<SectionAttr>()) | |||
5104 | return true; | |||
5105 | ||||
5106 | // A variable cannot be both common and exist in a section. | |||
5107 | // We don't try to determine which is the right section in the front-end. | |||
5108 | // If no specialized section name is applicable, it will resort to default. | |||
5109 | if (D->hasAttr<PragmaClangBSSSectionAttr>() || | |||
5110 | D->hasAttr<PragmaClangDataSectionAttr>() || | |||
5111 | D->hasAttr<PragmaClangRelroSectionAttr>() || | |||
5112 | D->hasAttr<PragmaClangRodataSectionAttr>()) | |||
5113 | return true; | |||
5114 | ||||
5115 | // Thread local vars aren't considered common linkage. | |||
5116 | if (D->getTLSKind()) | |||
5117 | return true; | |||
5118 | ||||
5119 | // Tentative definitions marked with WeakImportAttr are true definitions. | |||
5120 | if (D->hasAttr<WeakImportAttr>()) | |||
5121 | return true; | |||
5122 | ||||
5123 | // A variable cannot be both common and exist in a comdat. | |||
5124 | if (shouldBeInCOMDAT(CGM, *D)) | |||
5125 | return true; | |||
5126 | ||||
5127 | // Declarations with a required alignment do not have common linkage in MSVC | |||
5128 | // mode. | |||
5129 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
5130 | if (D->hasAttr<AlignedAttr>()) | |||
5131 | return true; | |||
5132 | QualType VarType = D->getType(); | |||
5133 | if (Context.isAlignmentRequired(VarType)) | |||
5134 | return true; | |||
5135 | ||||
5136 | if (const auto *RT = VarType->getAs<RecordType>()) { | |||
5137 | const RecordDecl *RD = RT->getDecl(); | |||
5138 | for (const FieldDecl *FD : RD->fields()) { | |||
5139 | if (FD->isBitField()) | |||
5140 | continue; | |||
5141 | if (FD->hasAttr<AlignedAttr>()) | |||
5142 | return true; | |||
5143 | if (Context.isAlignmentRequired(FD->getType())) | |||
5144 | return true; | |||
5145 | } | |||
5146 | } | |||
5147 | } | |||
5148 | ||||
5149 | // Microsoft's link.exe doesn't support alignments greater than 32 bytes for | |||
5150 | // common symbols, so symbols with greater alignment requirements cannot be | |||
5151 | // common. | |||
5152 | // Other COFF linkers (ld.bfd and LLD) support arbitrary power-of-two | |||
5153 | // alignments for common symbols via the aligncomm directive, so this | |||
5154 | // restriction only applies to MSVC environments. | |||
5155 | if (Context.getTargetInfo().getTriple().isKnownWindowsMSVCEnvironment() && | |||
5156 | Context.getTypeAlignIfKnown(D->getType()) > | |||
5157 | Context.toBits(CharUnits::fromQuantity(32))) | |||
5158 | return true; | |||
5159 | ||||
5160 | return false; | |||
5161 | } | |||
5162 | ||||
5163 | llvm::GlobalValue::LinkageTypes CodeGenModule::getLLVMLinkageForDeclarator( | |||
5164 | const DeclaratorDecl *D, GVALinkage Linkage, bool IsConstantVariable) { | |||
5165 | if (Linkage == GVA_Internal) | |||
5166 | return llvm::Function::InternalLinkage; | |||
5167 | ||||
5168 | if (D->hasAttr<WeakAttr>()) | |||
5169 | return llvm::GlobalVariable::WeakAnyLinkage; | |||
5170 | ||||
5171 | if (const auto *FD = D->getAsFunction()) | |||
5172 | if (FD->isMultiVersion() && Linkage == GVA_AvailableExternally) | |||
5173 | return llvm::GlobalVariable::LinkOnceAnyLinkage; | |||
5174 | ||||
5175 | // We are guaranteed to have a strong definition somewhere else, | |||
5176 | // so we can use available_externally linkage. | |||
5177 | if (Linkage == GVA_AvailableExternally) | |||
5178 | return llvm::GlobalValue::AvailableExternallyLinkage; | |||
5179 | ||||
5180 | // Note that Apple's kernel linker doesn't support symbol | |||
5181 | // coalescing, so we need to avoid linkonce and weak linkages there. | |||
5182 | // Normally, this means we just map to internal, but for explicit | |||
5183 | // instantiations we'll map to external. | |||
5184 | ||||
5185 | // In C++, the compiler has to emit a definition in every translation unit | |||
5186 | // that references the function. We should use linkonce_odr because | |||
5187 | // a) if all references in this translation unit are optimized away, we | |||
5188 | // don't need to codegen it. b) if the function persists, it needs to be | |||
5189 | // merged with other definitions. c) C++ has the ODR, so we know the | |||
5190 | // definition is dependable. | |||
5191 | if (Linkage == GVA_DiscardableODR) | |||
5192 | return !Context.getLangOpts().AppleKext ? llvm::Function::LinkOnceODRLinkage | |||
5193 | : llvm::Function::InternalLinkage; | |||
5194 | ||||
5195 | // An explicit instantiation of a template has weak linkage, since | |||
5196 | // explicit instantiations can occur in multiple translation units | |||
5197 | // and must all be equivalent. However, we are not allowed to | |||
5198 | // throw away these explicit instantiations. | |||
5199 | // | |||
5200 | // CUDA/HIP: For -fno-gpu-rdc case, device code is limited to one TU, | |||
5201 | // so say that CUDA templates are either external (for kernels) or internal. | |||
5202 | // This lets llvm perform aggressive inter-procedural optimizations. For | |||
5203 | // -fgpu-rdc case, device function calls across multiple TU's are allowed, | |||
5204 | // therefore we need to follow the normal linkage paradigm. | |||
5205 | if (Linkage == GVA_StrongODR) { | |||
5206 | if (getLangOpts().AppleKext) | |||
5207 | return llvm::Function::ExternalLinkage; | |||
5208 | if (getLangOpts().CUDA && getLangOpts().CUDAIsDevice && | |||
5209 | !getLangOpts().GPURelocatableDeviceCode) | |||
5210 | return D->hasAttr<CUDAGlobalAttr>() ? llvm::Function::ExternalLinkage | |||
5211 | : llvm::Function::InternalLinkage; | |||
5212 | return llvm::Function::WeakODRLinkage; | |||
5213 | } | |||
5214 | ||||
5215 | // C++ doesn't have tentative definitions and thus cannot have common | |||
5216 | // linkage. | |||
5217 | if (!getLangOpts().CPlusPlus && isa<VarDecl>(D) && | |||
5218 | !isVarDeclStrongDefinition(Context, *this, cast<VarDecl>(D), | |||
5219 | CodeGenOpts.NoCommon)) | |||
5220 | return llvm::GlobalVariable::CommonLinkage; | |||
5221 | ||||
5222 | // selectany symbols are externally visible, so use weak instead of | |||
5223 | // linkonce. MSVC optimizes away references to const selectany globals, so | |||
5224 | // all definitions should be the same and ODR linkage should be used. | |||
5225 | // http://msdn.microsoft.com/en-us/library/5tkz6s71.aspx | |||
5226 | if (D->hasAttr<SelectAnyAttr>()) | |||
5227 | return llvm::GlobalVariable::WeakODRLinkage; | |||
5228 | ||||
5229 | // Otherwise, we have strong external linkage. | |||
5230 | assert(Linkage == GVA_StrongExternal)(static_cast <bool> (Linkage == GVA_StrongExternal) ? void (0) : __assert_fail ("Linkage == GVA_StrongExternal", "clang/lib/CodeGen/CodeGenModule.cpp" , 5230, __extension__ __PRETTY_FUNCTION__)); | |||
5231 | return llvm::GlobalVariable::ExternalLinkage; | |||
5232 | } | |||
5233 | ||||
5234 | llvm::GlobalValue::LinkageTypes CodeGenModule::getLLVMLinkageVarDefinition( | |||
5235 | const VarDecl *VD, bool IsConstant) { | |||
5236 | GVALinkage Linkage = getContext().GetGVALinkageForVariable(VD); | |||
5237 | return getLLVMLinkageForDeclarator(VD, Linkage, IsConstant); | |||
5238 | } | |||
5239 | ||||
5240 | /// Replace the uses of a function that was declared with a non-proto type. | |||
5241 | /// We want to silently drop extra arguments from call sites | |||
5242 | static void replaceUsesOfNonProtoConstant(llvm::Constant *old, | |||
5243 | llvm::Function *newFn) { | |||
5244 | // Fast path. | |||
5245 | if (old->use_empty()) return; | |||
5246 | ||||
5247 | llvm::Type *newRetTy = newFn->getReturnType(); | |||
5248 | SmallVector<llvm::Value*, 4> newArgs; | |||
5249 | ||||
5250 | for (llvm::Value::use_iterator ui = old->use_begin(), ue = old->use_end(); | |||
5251 | ui != ue; ) { | |||
5252 | llvm::Value::use_iterator use = ui++; // Increment before the use is erased. | |||
5253 | llvm::User *user = use->getUser(); | |||
5254 | ||||
5255 | // Recognize and replace uses of bitcasts. Most calls to | |||
5256 | // unprototyped functions will use bitcasts. | |||
5257 | if (auto *bitcast = dyn_cast<llvm::ConstantExpr>(user)) { | |||
5258 | if (bitcast->getOpcode() == llvm::Instruction::BitCast) | |||
5259 | replaceUsesOfNonProtoConstant(bitcast, newFn); | |||
5260 | continue; | |||
5261 | } | |||
5262 | ||||
5263 | // Recognize calls to the function. | |||
5264 | llvm::CallBase *callSite = dyn_cast<llvm::CallBase>(user); | |||
5265 | if (!callSite) continue; | |||
5266 | if (!callSite->isCallee(&*use)) | |||
5267 | continue; | |||
5268 | ||||
5269 | // If the return types don't match exactly, then we can't | |||
5270 | // transform this call unless it's dead. | |||
5271 | if (callSite->getType() != newRetTy && !callSite->use_empty()) | |||
5272 | continue; | |||
5273 | ||||
5274 | // Get the call site's attribute list. | |||
5275 | SmallVector<llvm::AttributeSet, 8> newArgAttrs; | |||
5276 | llvm::AttributeList oldAttrs = callSite->getAttributes(); | |||
5277 | ||||
5278 | // If the function was passed too few arguments, don't transform. | |||
5279 | unsigned newNumArgs = newFn->arg_size(); | |||
5280 | if (callSite->arg_size() < newNumArgs) | |||
5281 | continue; | |||
5282 | ||||
5283 | // If extra arguments were passed, we silently drop them. | |||
5284 | // If any of the types mismatch, we don't transform. | |||
5285 | unsigned argNo = 0; | |||
5286 | bool dontTransform = false; | |||
5287 | for (llvm::Argument &A : newFn->args()) { | |||
5288 | if (callSite->getArgOperand(argNo)->getType() != A.getType()) { | |||
5289 | dontTransform = true; | |||
5290 | break; | |||
5291 | } | |||
5292 | ||||
5293 | // Add any parameter attributes. | |||
5294 | newArgAttrs.push_back(oldAttrs.getParamAttrs(argNo)); | |||
5295 | argNo++; | |||
5296 | } | |||
5297 | if (dontTransform) | |||
5298 | continue; | |||
5299 | ||||
5300 | // Okay, we can transform this. Create the new call instruction and copy | |||
5301 | // over the required information. | |||
5302 | newArgs.append(callSite->arg_begin(), callSite->arg_begin() + argNo); | |||
5303 | ||||
5304 | // Copy over any operand bundles. | |||
5305 | SmallVector<llvm::OperandBundleDef, 1> newBundles; | |||
5306 | callSite->getOperandBundlesAsDefs(newBundles); | |||
5307 | ||||
5308 | llvm::CallBase *newCall; | |||
5309 | if (isa<llvm::CallInst>(callSite)) { | |||
5310 | newCall = | |||
5311 | llvm::CallInst::Create(newFn, newArgs, newBundles, "", callSite); | |||
5312 | } else { | |||
5313 | auto *oldInvoke = cast<llvm::InvokeInst>(callSite); | |||
5314 | newCall = llvm::InvokeInst::Create(newFn, oldInvoke->getNormalDest(), | |||
5315 | oldInvoke->getUnwindDest(), newArgs, | |||
5316 | newBundles, "", callSite); | |||
5317 | } | |||
5318 | newArgs.clear(); // for the next iteration | |||
5319 | ||||
5320 | if (!newCall->getType()->isVoidTy()) | |||
5321 | newCall->takeName(callSite); | |||
5322 | newCall->setAttributes( | |||
5323 | llvm::AttributeList::get(newFn->getContext(), oldAttrs.getFnAttrs(), | |||
5324 | oldAttrs.getRetAttrs(), newArgAttrs)); | |||
5325 | newCall->setCallingConv(callSite->getCallingConv()); | |||
5326 | ||||
5327 | // Finally, remove the old call, replacing any uses with the new one. | |||
5328 | if (!callSite->use_empty()) | |||
5329 | callSite->replaceAllUsesWith(newCall); | |||
5330 | ||||
5331 | // Copy debug location attached to CI. | |||
5332 | if (callSite->getDebugLoc()) | |||
5333 | newCall->setDebugLoc(callSite->getDebugLoc()); | |||
5334 | ||||
5335 | callSite->eraseFromParent(); | |||
5336 | } | |||
5337 | } | |||
5338 | ||||
5339 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we | |||
5340 | /// implement a function with no prototype, e.g. "int foo() {}". If there are | |||
5341 | /// existing call uses of the old function in the module, this adjusts them to | |||
5342 | /// call the new function directly. | |||
5343 | /// | |||
5344 | /// This is not just a cleanup: the always_inline pass requires direct calls to | |||
5345 | /// functions to be able to inline them. If there is a bitcast in the way, it | |||
5346 | /// won't inline them. Instcombine normally deletes these calls, but it isn't | |||
5347 | /// run at -O0. | |||
5348 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, | |||
5349 | llvm::Function *NewFn) { | |||
5350 | // If we're redefining a global as a function, don't transform it. | |||
5351 | if (!isa<llvm::Function>(Old)) return; | |||
5352 | ||||
5353 | replaceUsesOfNonProtoConstant(Old, NewFn); | |||
5354 | } | |||
5355 | ||||
5356 | void CodeGenModule::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) { | |||
5357 | auto DK = VD->isThisDeclarationADefinition(); | |||
5358 | if (DK == VarDecl::Definition && VD->hasAttr<DLLImportAttr>()) | |||
5359 | return; | |||
5360 | ||||
5361 | TemplateSpecializationKind TSK = VD->getTemplateSpecializationKind(); | |||
5362 | // If we have a definition, this might be a deferred decl. If the | |||
5363 | // instantiation is explicit, make sure we emit it at the end. | |||
5364 | if (VD->getDefinition() && TSK == TSK_ExplicitInstantiationDefinition) | |||
5365 | GetAddrOfGlobalVar(VD); | |||
5366 | ||||
5367 | EmitTopLevelDecl(VD); | |||
5368 | } | |||
5369 | ||||
5370 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD, | |||
5371 | llvm::GlobalValue *GV) { | |||
5372 | const auto *D = cast<FunctionDecl>(GD.getDecl()); | |||
5373 | ||||
5374 | // Compute the function info and LLVM type. | |||
5375 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
5376 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
5377 | ||||
5378 | // Get or create the prototype for the function. | |||
5379 | if (!GV || (GV->getValueType() != Ty)) | |||
5380 | GV = cast<llvm::GlobalValue>(GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, | |||
5381 | /*DontDefer=*/true, | |||
5382 | ForDefinition)); | |||
5383 | ||||
5384 | // Already emitted. | |||
5385 | if (!GV->isDeclaration()) | |||
5386 | return; | |||
5387 | ||||
5388 | // We need to set linkage and visibility on the function before | |||
5389 | // generating code for it because various parts of IR generation | |||
5390 | // want to propagate this information down (e.g. to local static | |||
5391 | // declarations). | |||
5392 | auto *Fn = cast<llvm::Function>(GV); | |||
5393 | setFunctionLinkage(GD, Fn); | |||
5394 | ||||
5395 | // FIXME: this is redundant with part of setFunctionDefinitionAttributes | |||
5396 | setGVProperties(Fn, GD); | |||
5397 | ||||
5398 | MaybeHandleStaticInExternC(D, Fn); | |||
5399 | ||||
5400 | maybeSetTrivialComdat(*D, *Fn); | |||
5401 | ||||
5402 | // Set CodeGen attributes that represent floating point environment. | |||
5403 | setLLVMFunctionFEnvAttributes(D, Fn); | |||
5404 | ||||
5405 | CodeGenFunction(*this).GenerateCode(GD, Fn, FI); | |||
5406 | ||||
5407 | setNonAliasAttributes(GD, Fn); | |||
5408 | SetLLVMFunctionAttributesForDefinition(D, Fn); | |||
5409 | ||||
5410 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) | |||
5411 | AddGlobalCtor(Fn, CA->getPriority()); | |||
5412 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) | |||
5413 | AddGlobalDtor(Fn, DA->getPriority(), true); | |||
5414 | if (D->hasAttr<AnnotateAttr>()) | |||
5415 | AddGlobalAnnotations(D, Fn); | |||
5416 | } | |||
5417 | ||||
5418 | void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { | |||
5419 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
5420 | const AliasAttr *AA = D->getAttr<AliasAttr>(); | |||
5421 | assert(AA && "Not an alias?")(static_cast <bool> (AA && "Not an alias?") ? void (0) : __assert_fail ("AA && \"Not an alias?\"", "clang/lib/CodeGen/CodeGenModule.cpp" , 5421, __extension__ __PRETTY_FUNCTION__)); | |||
5422 | ||||
5423 | StringRef MangledName = getMangledName(GD); | |||
5424 | ||||
5425 | if (AA->getAliasee() == MangledName) { | |||
5426 | Diags.Report(AA->getLocation(), diag::err_cyclic_alias) << 0; | |||
5427 | return; | |||
5428 | } | |||
5429 | ||||
5430 | // If there is a definition in the module, then it wins over the alias. | |||
5431 | // This is dubious, but allow it to be safe. Just ignore the alias. | |||
5432 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
5433 | if (Entry && !Entry->isDeclaration()) | |||
5434 | return; | |||
5435 | ||||
5436 | Aliases.push_back(GD); | |||
5437 | ||||
5438 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); | |||
5439 | ||||
5440 | // Create a reference to the named value. This ensures that it is emitted | |||
5441 | // if a deferred decl. | |||
5442 | llvm::Constant *Aliasee; | |||
5443 | llvm::GlobalValue::LinkageTypes LT; | |||
5444 | if (isa<llvm::FunctionType>(DeclTy)) { | |||
5445 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GD, | |||
5446 | /*ForVTable=*/false); | |||
5447 | LT = getFunctionLinkage(GD); | |||
5448 | } else { | |||
5449 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), DeclTy, LangAS::Default, | |||
5450 | /*D=*/nullptr); | |||
5451 | if (const auto *VD = dyn_cast<VarDecl>(GD.getDecl())) | |||
5452 | LT = getLLVMLinkageVarDefinition(VD, D->getType().isConstQualified()); | |||
5453 | else | |||
5454 | LT = getFunctionLinkage(GD); | |||
5455 | } | |||
5456 | ||||
5457 | // Create the new alias itself, but don't set a name yet. | |||
5458 | unsigned AS = Aliasee->getType()->getPointerAddressSpace(); | |||
5459 | auto *GA = | |||
5460 | llvm::GlobalAlias::create(DeclTy, AS, LT, "", Aliasee, &getModule()); | |||
5461 | ||||
5462 | if (Entry) { | |||
5463 | if (GA->getAliasee() == Entry) { | |||
5464 | Diags.Report(AA->getLocation(), diag::err_cyclic_alias) << 0; | |||
5465 | return; | |||
5466 | } | |||
5467 | ||||
5468 | assert(Entry->isDeclaration())(static_cast <bool> (Entry->isDeclaration()) ? void ( 0) : __assert_fail ("Entry->isDeclaration()", "clang/lib/CodeGen/CodeGenModule.cpp" , 5468, __extension__ __PRETTY_FUNCTION__)); | |||
5469 | ||||
5470 | // If there is a declaration in the module, then we had an extern followed | |||
5471 | // by the alias, as in: | |||
5472 | // extern int test6(); | |||
5473 | // ... | |||
5474 | // int test6() __attribute__((alias("test7"))); | |||
5475 | // | |||
5476 | // Remove it and replace uses of it with the alias. | |||
5477 | GA->takeName(Entry); | |||
5478 | ||||
5479 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, | |||
5480 | Entry->getType())); | |||
5481 | Entry->eraseFromParent(); | |||
5482 | } else { | |||
5483 | GA->setName(MangledName); | |||
5484 | } | |||
5485 | ||||
5486 | // Set attributes which are particular to an alias; this is a | |||
5487 | // specialization of the attributes which may be set on a global | |||
5488 | // variable/function. | |||
5489 | if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakRefAttr>() || | |||
5490 | D->isWeakImported()) { | |||
5491 | GA->setLinkage(llvm::Function::WeakAnyLinkage); | |||
5492 | } | |||
5493 | ||||
5494 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
5495 | if (VD->getTLSKind()) | |||
5496 | setTLSMode(GA, *VD); | |||
5497 | ||||
5498 | SetCommonAttributes(GD, GA); | |||
5499 | ||||
5500 | // Emit global alias debug information. | |||
5501 | if (isa<VarDecl>(D)) | |||
5502 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5503 | DI->EmitGlobalAlias(cast<llvm::GlobalValue>(GA->getAliasee()->stripPointerCasts()), GD); | |||
5504 | } | |||
5505 | ||||
5506 | void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) { | |||
5507 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
5508 | const IFuncAttr *IFA = D->getAttr<IFuncAttr>(); | |||
5509 | assert(IFA && "Not an ifunc?")(static_cast <bool> (IFA && "Not an ifunc?") ? void (0) : __assert_fail ("IFA && \"Not an ifunc?\"", "clang/lib/CodeGen/CodeGenModule.cpp" , 5509, __extension__ __PRETTY_FUNCTION__)); | |||
5510 | ||||
5511 | StringRef MangledName = getMangledName(GD); | |||
5512 | ||||
5513 | if (IFA->getResolver() == MangledName) { | |||
5514 | Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1; | |||
5515 | return; | |||
5516 | } | |||
5517 | ||||
5518 | // Report an error if some definition overrides ifunc. | |||
5519 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
5520 | if (Entry && !Entry->isDeclaration()) { | |||
5521 | GlobalDecl OtherGD; | |||
5522 | if (lookupRepresentativeDecl(MangledName, OtherGD) && | |||
5523 | DiagnosedConflictingDefinitions.insert(GD).second) { | |||
5524 | Diags.Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
5525 | << MangledName; | |||
5526 | Diags.Report(OtherGD.getDecl()->getLocation(), | |||
5527 | diag::note_previous_definition); | |||
5528 | } | |||
5529 | return; | |||
5530 | } | |||
5531 | ||||
5532 | Aliases.push_back(GD); | |||
5533 | ||||
5534 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); | |||
5535 | llvm::Type *ResolverTy = llvm::GlobalIFunc::getResolverFunctionType(DeclTy); | |||
5536 | llvm::Constant *Resolver = | |||
5537 | GetOrCreateLLVMFunction(IFA->getResolver(), ResolverTy, {}, | |||
5538 | /*ForVTable=*/false); | |||
5539 | llvm::GlobalIFunc *GIF = | |||
5540 | llvm::GlobalIFunc::create(DeclTy, 0, llvm::Function::ExternalLinkage, | |||
5541 | "", Resolver, &getModule()); | |||
5542 | if (Entry) { | |||
5543 | if (GIF->getResolver() == Entry) { | |||
5544 | Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1; | |||
5545 | return; | |||
5546 | } | |||
5547 | assert(Entry->isDeclaration())(static_cast <bool> (Entry->isDeclaration()) ? void ( 0) : __assert_fail ("Entry->isDeclaration()", "clang/lib/CodeGen/CodeGenModule.cpp" , 5547, __extension__ __PRETTY_FUNCTION__)); | |||
5548 | ||||
5549 | // If there is a declaration in the module, then we had an extern followed | |||
5550 | // by the ifunc, as in: | |||
5551 | // extern int test(); | |||
5552 | // ... | |||
5553 | // int test() __attribute__((ifunc("resolver"))); | |||
5554 | // | |||
5555 | // Remove it and replace uses of it with the ifunc. | |||
5556 | GIF->takeName(Entry); | |||
5557 | ||||
5558 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GIF, | |||
5559 | Entry->getType())); | |||
5560 | Entry->eraseFromParent(); | |||
5561 | } else | |||
5562 | GIF->setName(MangledName); | |||
5563 | ||||
5564 | SetCommonAttributes(GD, GIF); | |||
5565 | } | |||
5566 | ||||
5567 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID, | |||
5568 | ArrayRef<llvm::Type*> Tys) { | |||
5569 | return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, | |||
5570 | Tys); | |||
5571 | } | |||
5572 | ||||
5573 | static llvm::StringMapEntry<llvm::GlobalVariable *> & | |||
5574 | GetConstantCFStringEntry(llvm::StringMap<llvm::GlobalVariable *> &Map, | |||
5575 | const StringLiteral *Literal, bool TargetIsLSB, | |||
5576 | bool &IsUTF16, unsigned &StringLength) { | |||
5577 | StringRef String = Literal->getString(); | |||
5578 | unsigned NumBytes = String.size(); | |||
5579 | ||||
5580 | // Check for simple case. | |||
5581 | if (!Literal->containsNonAsciiOrNull()) { | |||
5582 | StringLength = NumBytes; | |||
5583 | return *Map.insert(std::make_pair(String, nullptr)).first; | |||
5584 | } | |||
5585 | ||||
5586 | // Otherwise, convert the UTF8 literals into a string of shorts. | |||
5587 | IsUTF16 = true; | |||
5588 | ||||
5589 | SmallVector<llvm::UTF16, 128> ToBuf(NumBytes + 1); // +1 for ending nulls. | |||
5590 | const llvm::UTF8 *FromPtr = (const llvm::UTF8 *)String.data(); | |||
5591 | llvm::UTF16 *ToPtr = &ToBuf[0]; | |||
5592 | ||||
5593 | (void)llvm::ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, &ToPtr, | |||
5594 | ToPtr + NumBytes, llvm::strictConversion); | |||
5595 | ||||
5596 | // ConvertUTF8toUTF16 returns the length in ToPtr. | |||
5597 | StringLength = ToPtr - &ToBuf[0]; | |||
5598 | ||||
5599 | // Add an explicit null. | |||
5600 | *ToPtr = 0; | |||
5601 | return *Map.insert(std::make_pair( | |||
5602 | StringRef(reinterpret_cast<const char *>(ToBuf.data()), | |||
5603 | (StringLength + 1) * 2), | |||
5604 | nullptr)).first; | |||
5605 | } | |||
5606 | ||||
5607 | ConstantAddress | |||
5608 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { | |||
5609 | unsigned StringLength = 0; | |||
5610 | bool isUTF16 = false; | |||
5611 | llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = | |||
5612 | GetConstantCFStringEntry(CFConstantStringMap, Literal, | |||
5613 | getDataLayout().isLittleEndian(), isUTF16, | |||
5614 | StringLength); | |||
5615 | ||||
5616 | if (auto *C = Entry.second) | |||
5617 | return ConstantAddress( | |||
5618 | C, C->getValueType(), CharUnits::fromQuantity(C->getAlignment())); | |||
5619 | ||||
5620 | llvm::Constant *Zero = llvm::Constant::getNullValue(Int32Ty); | |||
5621 | llvm::Constant *Zeros[] = { Zero, Zero }; | |||
5622 | ||||
5623 | const ASTContext &Context = getContext(); | |||
5624 | const llvm::Triple &Triple = getTriple(); | |||
5625 | ||||
5626 | const auto CFRuntime = getLangOpts().CFRuntime; | |||
5627 | const bool IsSwiftABI = | |||
5628 | static_cast<unsigned>(CFRuntime) >= | |||
5629 | static_cast<unsigned>(LangOptions::CoreFoundationABI::Swift); | |||
5630 | const bool IsSwift4_1 = CFRuntime == LangOptions::CoreFoundationABI::Swift4_1; | |||
5631 | ||||
5632 | // If we don't already have it, get __CFConstantStringClassReference. | |||
5633 | if (!CFConstantStringClassRef) { | |||
5634 | const char *CFConstantStringClassName = "__CFConstantStringClassReference"; | |||
5635 | llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); | |||
5636 | Ty = llvm::ArrayType::get(Ty, 0); | |||
5637 | ||||
5638 | switch (CFRuntime) { | |||
5639 | default: break; | |||
5640 | case LangOptions::CoreFoundationABI::Swift: [[fallthrough]]; | |||
5641 | case LangOptions::CoreFoundationABI::Swift5_0: | |||
5642 | CFConstantStringClassName = | |||
5643 | Triple.isOSDarwin() ? "$s15SwiftFoundation19_NSCFConstantStringCN" | |||
5644 | : "$s10Foundation19_NSCFConstantStringCN"; | |||
5645 | Ty = IntPtrTy; | |||
5646 | break; | |||
5647 | case LangOptions::CoreFoundationABI::Swift4_2: | |||
5648 | CFConstantStringClassName = | |||
5649 | Triple.isOSDarwin() ? "$S15SwiftFoundation19_NSCFConstantStringCN" | |||
5650 | : "$S10Foundation19_NSCFConstantStringCN"; | |||
5651 | Ty = IntPtrTy; | |||
5652 | break; | |||
5653 | case LangOptions::CoreFoundationABI::Swift4_1: | |||
5654 | CFConstantStringClassName = | |||
5655 | Triple.isOSDarwin() ? "__T015SwiftFoundation19_NSCFConstantStringCN" | |||
5656 | : "__T010Foundation19_NSCFConstantStringCN"; | |||
5657 | Ty = IntPtrTy; | |||
5658 | break; | |||
5659 | } | |||
5660 | ||||
5661 | llvm::Constant *C = CreateRuntimeVariable(Ty, CFConstantStringClassName); | |||
5662 | ||||
5663 | if (Triple.isOSBinFormatELF() || Triple.isOSBinFormatCOFF()) { | |||
5664 | llvm::GlobalValue *GV = nullptr; | |||
5665 | ||||
5666 | if ((GV = dyn_cast<llvm::GlobalValue>(C))) { | |||
5667 | IdentifierInfo &II = Context.Idents.get(GV->getName()); | |||
5668 | TranslationUnitDecl *TUDecl = Context.getTranslationUnitDecl(); | |||
5669 | DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl); | |||
5670 | ||||
5671 | const VarDecl *VD = nullptr; | |||
5672 | for (const auto *Result : DC->lookup(&II)) | |||
5673 | if ((VD = dyn_cast<VarDecl>(Result))) | |||
5674 | break; | |||
5675 | ||||
5676 | if (Triple.isOSBinFormatELF()) { | |||
5677 | if (!VD) | |||
5678 | GV->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
5679 | } else { | |||
5680 | GV->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
5681 | if (!VD || !VD->hasAttr<DLLExportAttr>()) | |||
5682 | GV->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); | |||
5683 | else | |||
5684 | GV->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass); | |||
5685 | } | |||
5686 | ||||
5687 | setDSOLocal(GV); | |||
5688 | } | |||
5689 | } | |||
5690 | ||||
5691 | // Decay array -> ptr | |||
5692 | CFConstantStringClassRef = | |||
5693 | IsSwiftABI ? llvm::ConstantExpr::getPtrToInt(C, Ty) | |||
5694 | : llvm::ConstantExpr::getGetElementPtr(Ty, C, Zeros); | |||
5695 | } | |||
5696 | ||||
5697 | QualType CFTy = Context.getCFConstantStringType(); | |||
5698 | ||||
5699 | auto *STy = cast<llvm::StructType>(getTypes().ConvertType(CFTy)); | |||
5700 | ||||
5701 | ConstantInitBuilder Builder(*this); | |||
5702 | auto Fields = Builder.beginStruct(STy); | |||
5703 | ||||
5704 | // Class pointer. | |||
5705 | Fields.add(cast<llvm::Constant>(CFConstantStringClassRef)); | |||
5706 | ||||
5707 | // Flags. | |||
5708 | if (IsSwiftABI) { | |||
5709 | Fields.addInt(IntPtrTy, IsSwift4_1 ? 0x05 : 0x01); | |||
5710 | Fields.addInt(Int64Ty, isUTF16 ? 0x07d0 : 0x07c8); | |||
5711 | } else { | |||
5712 | Fields.addInt(IntTy, isUTF16 ? 0x07d0 : 0x07C8); | |||
5713 | } | |||
5714 | ||||
5715 | // String pointer. | |||
5716 | llvm::Constant *C = nullptr; | |||
5717 | if (isUTF16) { | |||
5718 | auto Arr = llvm::ArrayRef( | |||
5719 | reinterpret_cast<uint16_t *>(const_cast<char *>(Entry.first().data())), | |||
5720 | Entry.first().size() / 2); | |||
5721 | C = llvm::ConstantDataArray::get(VMContext, Arr); | |||
5722 | } else { | |||
5723 | C = llvm::ConstantDataArray::getString(VMContext, Entry.first()); | |||
5724 | } | |||
5725 | ||||
5726 | // Note: -fwritable-strings doesn't make the backing store strings of | |||
5727 | // CFStrings writable. (See <rdar://problem/10657500>) | |||
5728 | auto *GV = | |||
5729 | new llvm::GlobalVariable(getModule(), C->getType(), /*isConstant=*/true, | |||
5730 | llvm::GlobalValue::PrivateLinkage, C, ".str"); | |||
5731 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
5732 | // Don't enforce the target's minimum global alignment, since the only use | |||
5733 | // of the string is via this class initializer. | |||
5734 | CharUnits Align = isUTF16 ? Context.getTypeAlignInChars(Context.ShortTy) | |||
5735 | : Context.getTypeAlignInChars(Context.CharTy); | |||
5736 | GV->setAlignment(Align.getAsAlign()); | |||
5737 | ||||
5738 | // FIXME: We set the section explicitly to avoid a bug in ld64 224.1. | |||
5739 | // Without it LLVM can merge the string with a non unnamed_addr one during | |||
5740 | // LTO. Doing that changes the section it ends in, which surprises ld64. | |||
5741 | if (Triple.isOSBinFormatMachO()) | |||
5742 | GV->setSection(isUTF16 ? "__TEXT,__ustring" | |||
5743 | : "__TEXT,__cstring,cstring_literals"); | |||
5744 | // Make sure the literal ends up in .rodata to allow for safe ICF and for | |||
5745 | // the static linker to adjust permissions to read-only later on. | |||
5746 | else if (Triple.isOSBinFormatELF()) | |||
5747 | GV->setSection(".rodata"); | |||
5748 | ||||
5749 | // String. | |||
5750 | llvm::Constant *Str = | |||
5751 | llvm::ConstantExpr::getGetElementPtr(GV->getValueType(), GV, Zeros); | |||
5752 | ||||
5753 | if (isUTF16) | |||
5754 | // Cast the UTF16 string to the correct type. | |||
5755 | Str = llvm::ConstantExpr::getBitCast(Str, Int8PtrTy); | |||
5756 | Fields.add(Str); | |||
5757 | ||||
5758 | // String length. | |||
5759 | llvm::IntegerType *LengthTy = | |||
5760 | llvm::IntegerType::get(getModule().getContext(), | |||
5761 | Context.getTargetInfo().getLongWidth()); | |||
5762 | if (IsSwiftABI) { | |||
5763 | if (CFRuntime == LangOptions::CoreFoundationABI::Swift4_1 || | |||
5764 | CFRuntime == LangOptions::CoreFoundationABI::Swift4_2) | |||
5765 | LengthTy = Int32Ty; | |||
5766 | else | |||
5767 | LengthTy = IntPtrTy; | |||
5768 | } | |||
5769 | Fields.addInt(LengthTy, StringLength); | |||
5770 | ||||
5771 | // Swift ABI requires 8-byte alignment to ensure that the _Atomic(uint64_t) is | |||
5772 | // properly aligned on 32-bit platforms. | |||
5773 | CharUnits Alignment = | |||
5774 | IsSwiftABI ? Context.toCharUnitsFromBits(64) : getPointerAlign(); | |||
5775 | ||||
5776 | // The struct. | |||
5777 | GV = Fields.finishAndCreateGlobal("_unnamed_cfstring_", Alignment, | |||
5778 | /*isConstant=*/false, | |||
5779 | llvm::GlobalVariable::PrivateLinkage); | |||
5780 | GV->addAttribute("objc_arc_inert"); | |||
5781 | switch (Triple.getObjectFormat()) { | |||
5782 | case llvm::Triple::UnknownObjectFormat: | |||
5783 | llvm_unreachable("unknown file format")::llvm::llvm_unreachable_internal("unknown file format", "clang/lib/CodeGen/CodeGenModule.cpp" , 5783); | |||
5784 | case llvm::Triple::DXContainer: | |||
5785 | case llvm::Triple::GOFF: | |||
5786 | case llvm::Triple::SPIRV: | |||
5787 | case llvm::Triple::XCOFF: | |||
5788 | llvm_unreachable("unimplemented")::llvm::llvm_unreachable_internal("unimplemented", "clang/lib/CodeGen/CodeGenModule.cpp" , 5788); | |||
5789 | case llvm::Triple::COFF: | |||
5790 | case llvm::Triple::ELF: | |||
5791 | case llvm::Triple::Wasm: | |||
5792 | GV->setSection("cfstring"); | |||
5793 | break; | |||
5794 | case llvm::Triple::MachO: | |||
5795 | GV->setSection("__DATA,__cfstring"); | |||
5796 | break; | |||
5797 | } | |||
5798 | Entry.second = GV; | |||
5799 | ||||
5800 | return ConstantAddress(GV, GV->getValueType(), Alignment); | |||
5801 | } | |||
5802 | ||||
5803 | bool CodeGenModule::getExpressionLocationsEnabled() const { | |||
5804 | return !CodeGenOpts.EmitCodeView || CodeGenOpts.DebugColumnInfo; | |||
5805 | } | |||
5806 | ||||
5807 | QualType CodeGenModule::getObjCFastEnumerationStateType() { | |||
5808 | if (ObjCFastEnumerationStateType.isNull()) { | |||
5809 | RecordDecl *D = Context.buildImplicitRecord("__objcFastEnumerationState"); | |||
5810 | D->startDefinition(); | |||
5811 | ||||
5812 | QualType FieldTypes[] = { | |||
5813 | Context.UnsignedLongTy, | |||
5814 | Context.getPointerType(Context.getObjCIdType()), | |||
5815 | Context.getPointerType(Context.UnsignedLongTy), | |||
5816 | Context.getConstantArrayType(Context.UnsignedLongTy, | |||
5817 | llvm::APInt(32, 5), nullptr, ArrayType::Normal, 0) | |||
5818 | }; | |||
5819 | ||||
5820 | for (size_t i = 0; i < 4; ++i) { | |||
5821 | FieldDecl *Field = FieldDecl::Create(Context, | |||
5822 | D, | |||
5823 | SourceLocation(), | |||
5824 | SourceLocation(), nullptr, | |||
5825 | FieldTypes[i], /*TInfo=*/nullptr, | |||
5826 | /*BitWidth=*/nullptr, | |||
5827 | /*Mutable=*/false, | |||
5828 | ICIS_NoInit); | |||
5829 | Field->setAccess(AS_public); | |||
5830 | D->addDecl(Field); | |||
5831 | } | |||
5832 | ||||
5833 | D->completeDefinition(); | |||
5834 | ObjCFastEnumerationStateType = Context.getTagDeclType(D); | |||
5835 | } | |||
5836 | ||||
5837 | return ObjCFastEnumerationStateType; | |||
5838 | } | |||
5839 | ||||
5840 | llvm::Constant * | |||
5841 | CodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) { | |||
5842 | assert(!E->getType()->isPointerType() && "Strings are always arrays")(static_cast <bool> (!E->getType()->isPointerType () && "Strings are always arrays") ? void (0) : __assert_fail ("!E->getType()->isPointerType() && \"Strings are always arrays\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 5842, __extension__ __PRETTY_FUNCTION__ )); | |||
5843 | ||||
5844 | // Don't emit it as the address of the string, emit the string data itself | |||
5845 | // as an inline array. | |||
5846 | if (E->getCharByteWidth() == 1) { | |||
5847 | SmallString<64> Str(E->getString()); | |||
5848 | ||||
5849 | // Resize the string to the right size, which is indicated by its type. | |||
5850 | const ConstantArrayType *CAT = Context.getAsConstantArrayType(E->getType()); | |||
5851 | Str.resize(CAT->getSize().getZExtValue()); | |||
5852 | return llvm::ConstantDataArray::getString(VMContext, Str, false); | |||
5853 | } | |||
5854 | ||||
5855 | auto *AType = cast<llvm::ArrayType>(getTypes().ConvertType(E->getType())); | |||
5856 | llvm::Type *ElemTy = AType->getElementType(); | |||
5857 | unsigned NumElements = AType->getNumElements(); | |||
5858 | ||||
5859 | // Wide strings have either 2-byte or 4-byte elements. | |||
5860 | if (ElemTy->getPrimitiveSizeInBits() == 16) { | |||
5861 | SmallVector<uint16_t, 32> Elements; | |||
5862 | Elements.reserve(NumElements); | |||
5863 | ||||
5864 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) | |||
5865 | Elements.push_back(E->getCodeUnit(i)); | |||
5866 | Elements.resize(NumElements); | |||
5867 | return llvm::ConstantDataArray::get(VMContext, Elements); | |||
5868 | } | |||
5869 | ||||
5870 | assert(ElemTy->getPrimitiveSizeInBits() == 32)(static_cast <bool> (ElemTy->getPrimitiveSizeInBits( ) == 32) ? void (0) : __assert_fail ("ElemTy->getPrimitiveSizeInBits() == 32" , "clang/lib/CodeGen/CodeGenModule.cpp", 5870, __extension__ __PRETTY_FUNCTION__ )); | |||
5871 | SmallVector<uint32_t, 32> Elements; | |||
5872 | Elements.reserve(NumElements); | |||
5873 | ||||
5874 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) | |||
5875 | Elements.push_back(E->getCodeUnit(i)); | |||
5876 | Elements.resize(NumElements); | |||
5877 | return llvm::ConstantDataArray::get(VMContext, Elements); | |||
5878 | } | |||
5879 | ||||
5880 | static llvm::GlobalVariable * | |||
5881 | GenerateStringLiteral(llvm::Constant *C, llvm::GlobalValue::LinkageTypes LT, | |||
5882 | CodeGenModule &CGM, StringRef GlobalName, | |||
5883 | CharUnits Alignment) { | |||
5884 | unsigned AddrSpace = CGM.getContext().getTargetAddressSpace( | |||
5885 | CGM.GetGlobalConstantAddressSpace()); | |||
5886 | ||||
5887 | llvm::Module &M = CGM.getModule(); | |||
5888 | // Create a global variable for this string | |||
5889 | auto *GV = new llvm::GlobalVariable( | |||
5890 | M, C->getType(), !CGM.getLangOpts().WritableStrings, LT, C, GlobalName, | |||
5891 | nullptr, llvm::GlobalVariable::NotThreadLocal, AddrSpace); | |||
5892 | GV->setAlignment(Alignment.getAsAlign()); | |||
5893 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
5894 | if (GV->isWeakForLinker()) { | |||
5895 | assert(CGM.supportsCOMDAT() && "Only COFF uses weak string literals")(static_cast <bool> (CGM.supportsCOMDAT() && "Only COFF uses weak string literals" ) ? void (0) : __assert_fail ("CGM.supportsCOMDAT() && \"Only COFF uses weak string literals\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 5895, __extension__ __PRETTY_FUNCTION__ )); | |||
5896 | GV->setComdat(M.getOrInsertComdat(GV->getName())); | |||
5897 | } | |||
5898 | CGM.setDSOLocal(GV); | |||
5899 | ||||
5900 | return GV; | |||
5901 | } | |||
5902 | ||||
5903 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a | |||
5904 | /// constant array for the given string literal. | |||
5905 | ConstantAddress | |||
5906 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S, | |||
5907 | StringRef Name) { | |||
5908 | CharUnits Alignment = getContext().getAlignOfGlobalVarInChars(S->getType()); | |||
5909 | ||||
5910 | llvm::Constant *C = GetConstantArrayFromStringLiteral(S); | |||
5911 | llvm::GlobalVariable **Entry = nullptr; | |||
5912 | if (!LangOpts.WritableStrings) { | |||
5913 | Entry = &ConstantStringMap[C]; | |||
5914 | if (auto GV = *Entry) { | |||
5915 | if (uint64_t(Alignment.getQuantity()) > GV->getAlignment()) | |||
5916 | GV->setAlignment(Alignment.getAsAlign()); | |||
5917 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5918 | GV->getValueType(), Alignment); | |||
5919 | } | |||
5920 | } | |||
5921 | ||||
5922 | SmallString<256> MangledNameBuffer; | |||
5923 | StringRef GlobalVariableName; | |||
5924 | llvm::GlobalValue::LinkageTypes LT; | |||
5925 | ||||
5926 | // Mangle the string literal if that's how the ABI merges duplicate strings. | |||
5927 | // Don't do it if they are writable, since we don't want writes in one TU to | |||
5928 | // affect strings in another. | |||
5929 | if (getCXXABI().getMangleContext().shouldMangleStringLiteral(S) && | |||
5930 | !LangOpts.WritableStrings) { | |||
5931 | llvm::raw_svector_ostream Out(MangledNameBuffer); | |||
5932 | getCXXABI().getMangleContext().mangleStringLiteral(S, Out); | |||
5933 | LT = llvm::GlobalValue::LinkOnceODRLinkage; | |||
5934 | GlobalVariableName = MangledNameBuffer; | |||
5935 | } else { | |||
5936 | LT = llvm::GlobalValue::PrivateLinkage; | |||
5937 | GlobalVariableName = Name; | |||
5938 | } | |||
5939 | ||||
5940 | auto GV = GenerateStringLiteral(C, LT, *this, GlobalVariableName, Alignment); | |||
5941 | ||||
5942 | CGDebugInfo *DI = getModuleDebugInfo(); | |||
5943 | if (DI && getCodeGenOpts().hasReducedDebugInfo()) | |||
5944 | DI->AddStringLiteralDebugInfo(GV, S); | |||
5945 | ||||
5946 | if (Entry) | |||
5947 | *Entry = GV; | |||
5948 | ||||
5949 | SanitizerMD->reportGlobal(GV, S->getStrTokenLoc(0), "<string literal>"); | |||
5950 | ||||
5951 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5952 | GV->getValueType(), Alignment); | |||
5953 | } | |||
5954 | ||||
5955 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant | |||
5956 | /// array for the given ObjCEncodeExpr node. | |||
5957 | ConstantAddress | |||
5958 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { | |||
5959 | std::string Str; | |||
5960 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); | |||
5961 | ||||
5962 | return GetAddrOfConstantCString(Str); | |||
5963 | } | |||
5964 | ||||
5965 | /// GetAddrOfConstantCString - Returns a pointer to a character array containing | |||
5966 | /// the literal and a terminating '\0' character. | |||
5967 | /// The result has pointer to array type. | |||
5968 | ConstantAddress CodeGenModule::GetAddrOfConstantCString( | |||
5969 | const std::string &Str, const char *GlobalName) { | |||
5970 | StringRef StrWithNull(Str.c_str(), Str.size() + 1); | |||
5971 | CharUnits Alignment = | |||
5972 | getContext().getAlignOfGlobalVarInChars(getContext().CharTy); | |||
5973 | ||||
5974 | llvm::Constant *C = | |||
5975 | llvm::ConstantDataArray::getString(getLLVMContext(), StrWithNull, false); | |||
5976 | ||||
5977 | // Don't share any string literals if strings aren't constant. | |||
5978 | llvm::GlobalVariable **Entry = nullptr; | |||
5979 | if (!LangOpts.WritableStrings) { | |||
5980 | Entry = &ConstantStringMap[C]; | |||
5981 | if (auto GV = *Entry) { | |||
5982 | if (uint64_t(Alignment.getQuantity()) > GV->getAlignment()) | |||
5983 | GV->setAlignment(Alignment.getAsAlign()); | |||
5984 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5985 | GV->getValueType(), Alignment); | |||
5986 | } | |||
5987 | } | |||
5988 | ||||
5989 | // Get the default prefix if a name wasn't specified. | |||
5990 | if (!GlobalName) | |||
5991 | GlobalName = ".str"; | |||
5992 | // Create a global variable for this. | |||
5993 | auto GV = GenerateStringLiteral(C, llvm::GlobalValue::PrivateLinkage, *this, | |||
5994 | GlobalName, Alignment); | |||
5995 | if (Entry) | |||
5996 | *Entry = GV; | |||
5997 | ||||
5998 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5999 | GV->getValueType(), Alignment); | |||
6000 | } | |||
6001 | ||||
6002 | ConstantAddress CodeGenModule::GetAddrOfGlobalTemporary( | |||
6003 | const MaterializeTemporaryExpr *E, const Expr *Init) { | |||
6004 | assert((E->getStorageDuration() == SD_Static ||(static_cast <bool> ((E->getStorageDuration() == SD_Static || E->getStorageDuration() == SD_Thread) && "not a global temporary" ) ? void (0) : __assert_fail ("(E->getStorageDuration() == SD_Static || E->getStorageDuration() == SD_Thread) && \"not a global temporary\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 6005, __extension__ __PRETTY_FUNCTION__ )) | |||
| ||||
6005 | E->getStorageDuration() == SD_Thread) && "not a global temporary")(static_cast <bool> ((E->getStorageDuration() == SD_Static || E->getStorageDuration() == SD_Thread) && "not a global temporary" ) ? void (0) : __assert_fail ("(E->getStorageDuration() == SD_Static || E->getStorageDuration() == SD_Thread) && \"not a global temporary\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 6005, __extension__ __PRETTY_FUNCTION__ )); | |||
6006 | const auto *VD = cast<VarDecl>(E->getExtendingDecl()); | |||
6007 | ||||
6008 | // If we're not materializing a subobject of the temporary, keep the | |||
6009 | // cv-qualifiers from the type of the MaterializeTemporaryExpr. | |||
6010 | QualType MaterializedType = Init->getType(); | |||
6011 | if (Init == E->getSubExpr()) | |||
6012 | MaterializedType = E->getType(); | |||
6013 | ||||
6014 | CharUnits Align = getContext().getTypeAlignInChars(MaterializedType); | |||
6015 | ||||
6016 | auto InsertResult = MaterializedGlobalTemporaryMap.insert({E, nullptr}); | |||
6017 | if (!InsertResult.second) { | |||
6018 | // We've seen this before: either we already created it or we're in the | |||
6019 | // process of doing so. | |||
6020 | if (!InsertResult.first->second) { | |||
6021 | // We recursively re-entered this function, probably during emission of | |||
6022 | // the initializer. Create a placeholder. We'll clean this up in the | |||
6023 | // outer call, at the end of this function. | |||
6024 | llvm::Type *Type = getTypes().ConvertTypeForMem(MaterializedType); | |||
6025 | InsertResult.first->second = new llvm::GlobalVariable( | |||
6026 | getModule(), Type, false, llvm::GlobalVariable::InternalLinkage, | |||
6027 | nullptr); | |||
6028 | } | |||
6029 | return ConstantAddress(InsertResult.first->second, | |||
6030 | llvm::cast<llvm::GlobalVariable>( | |||
6031 | InsertResult.first->second->stripPointerCasts()) | |||
6032 | ->getValueType(), | |||
6033 | Align); | |||
6034 | } | |||
6035 | ||||
6036 | // FIXME: If an externally-visible declaration extends multiple temporaries, | |||
6037 | // we need to give each temporary the same name in every translation unit (and | |||
6038 | // we also need to make the temporaries externally-visible). | |||
6039 | SmallString<256> Name; | |||
6040 | llvm::raw_svector_ostream Out(Name); | |||
6041 | getCXXABI().getMangleContext().mangleReferenceTemporary( | |||
6042 | VD, E->getManglingNumber(), Out); | |||
6043 | ||||
6044 | APValue *Value = nullptr; | |||
6045 | if (E->getStorageDuration() == SD_Static && VD && VD->evaluateValue()) { | |||
6046 | // If the initializer of the extending declaration is a constant | |||
6047 | // initializer, we should have a cached constant initializer for this | |||
6048 | // temporary. Note that this might have a different value from the value | |||
6049 | // computed by evaluating the initializer if the surrounding constant | |||
6050 | // expression modifies the temporary. | |||
6051 | Value = E->getOrCreateValue(false); | |||
6052 | } | |||
6053 | ||||
6054 | // Try evaluating it now, it might have a constant initializer. | |||
6055 | Expr::EvalResult EvalResult; | |||
6056 | if (!Value
| |||
6057 | !EvalResult.hasSideEffects()) | |||
6058 | Value = &EvalResult.Val; | |||
6059 | ||||
6060 | LangAS AddrSpace = | |||
6061 | VD ? GetGlobalVarAddressSpace(VD) : MaterializedType.getAddressSpace(); | |||
6062 | ||||
6063 | std::optional<ConstantEmitter> emitter; | |||
6064 | llvm::Constant *InitialValue = nullptr; | |||
6065 | bool Constant = false; | |||
6066 | llvm::Type *Type; | |||
6067 | if (Value
| |||
6068 | // The temporary has a constant initializer, use it. | |||
6069 | emitter.emplace(*this); | |||
6070 | InitialValue = emitter->emitForInitializer(*Value, AddrSpace, | |||
6071 | MaterializedType); | |||
6072 | Constant = isTypeConstant(MaterializedType, /*ExcludeCtor*/Value); | |||
6073 | Type = InitialValue->getType(); | |||
6074 | } else { | |||
6075 | // No initializer, the initialization will be provided when we | |||
6076 | // initialize the declaration which performed lifetime extension. | |||
6077 | Type = getTypes().ConvertTypeForMem(MaterializedType); | |||
6078 | } | |||
6079 | ||||
6080 | // Create a global variable for this lifetime-extended temporary. | |||
6081 | llvm::GlobalValue::LinkageTypes Linkage = | |||
6082 | getLLVMLinkageVarDefinition(VD, Constant); | |||
6083 | if (Linkage == llvm::GlobalVariable::ExternalLinkage) { | |||
6084 | const VarDecl *InitVD; | |||
6085 | if (VD->isStaticDataMember() && VD->getAnyInitializer(InitVD) && | |||
| ||||
6086 | isa<CXXRecordDecl>(InitVD->getLexicalDeclContext())) { | |||
6087 | // Temporaries defined inside a class get linkonce_odr linkage because the | |||
6088 | // class can be defined in multiple translation units. | |||
6089 | Linkage = llvm::GlobalVariable::LinkOnceODRLinkage; | |||
6090 | } else { | |||
6091 | // There is no need for this temporary to have external linkage if the | |||
6092 | // VarDecl has external linkage. | |||
6093 | Linkage = llvm::GlobalVariable::InternalLinkage; | |||
6094 | } | |||
6095 | } | |||
6096 | auto TargetAS = getContext().getTargetAddressSpace(AddrSpace); | |||
6097 | auto *GV = new llvm::GlobalVariable( | |||
6098 | getModule(), Type, Constant, Linkage, InitialValue, Name.c_str(), | |||
6099 | /*InsertBefore=*/nullptr, llvm::GlobalVariable::NotThreadLocal, TargetAS); | |||
6100 | if (emitter) emitter->finalize(GV); | |||
6101 | // Don't assign dllimport or dllexport to local linkage globals. | |||
6102 | if (!llvm::GlobalValue::isLocalLinkage(Linkage)) { | |||
6103 | setGVProperties(GV, VD); | |||
6104 | if (GV->getDLLStorageClass() == llvm::GlobalVariable::DLLExportStorageClass) | |||
6105 | // The reference temporary should never be dllexport. | |||
6106 | GV->setDLLStorageClass(llvm::GlobalVariable::DefaultStorageClass); | |||
6107 | } | |||
6108 | GV->setAlignment(Align.getAsAlign()); | |||
6109 | if (supportsCOMDAT() && GV->isWeakForLinker()) | |||
6110 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
6111 | if (VD->getTLSKind()) | |||
6112 | setTLSMode(GV, *VD); | |||
6113 | llvm::Constant *CV = GV; | |||
6114 | if (AddrSpace != LangAS::Default) | |||
6115 | CV = getTargetCodeGenInfo().performAddrSpaceCast( | |||
6116 | *this, GV, AddrSpace, LangAS::Default, | |||
6117 | Type->getPointerTo( | |||
6118 | getContext().getTargetAddressSpace(LangAS::Default))); | |||
6119 | ||||
6120 | // Update the map with the new temporary. If we created a placeholder above, | |||
6121 | // replace it with the new global now. | |||
6122 | llvm::Constant *&Entry = MaterializedGlobalTemporaryMap[E]; | |||
6123 | if (Entry) { | |||
6124 | Entry->replaceAllUsesWith( | |||
6125 | llvm::ConstantExpr::getBitCast(CV, Entry->getType())); | |||
6126 | llvm::cast<llvm::GlobalVariable>(Entry)->eraseFromParent(); | |||
6127 | } | |||
6128 | Entry = CV; | |||
6129 | ||||
6130 | return ConstantAddress(CV, Type, Align); | |||
6131 | } | |||
6132 | ||||
6133 | /// EmitObjCPropertyImplementations - Emit information for synthesized | |||
6134 | /// properties for an implementation. | |||
6135 | void CodeGenModule::EmitObjCPropertyImplementations(const | |||
6136 | ObjCImplementationDecl *D) { | |||
6137 | for (const auto *PID : D->property_impls()) { | |||
6138 | // Dynamic is just for type-checking. | |||
6139 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { | |||
6140 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); | |||
6141 | ||||
6142 | // Determine which methods need to be implemented, some may have | |||
6143 | // been overridden. Note that ::isPropertyAccessor is not the method | |||
6144 | // we want, that just indicates if the decl came from a | |||
6145 | // property. What we want to know is if the method is defined in | |||
6146 | // this implementation. | |||
6147 | auto *Getter = PID->getGetterMethodDecl(); | |||
6148 | if (!Getter || Getter->isSynthesizedAccessorStub()) | |||
6149 | CodeGenFunction(*this).GenerateObjCGetter( | |||
6150 | const_cast<ObjCImplementationDecl *>(D), PID); | |||
6151 | auto *Setter = PID->getSetterMethodDecl(); | |||
6152 | if (!PD->isReadOnly() && (!Setter || Setter->isSynthesizedAccessorStub())) | |||
6153 | CodeGenFunction(*this).GenerateObjCSetter( | |||
6154 | const_cast<ObjCImplementationDecl *>(D), PID); | |||
6155 | } | |||
6156 | } | |||
6157 | } | |||
6158 | ||||
6159 | static bool needsDestructMethod(ObjCImplementationDecl *impl) { | |||
6160 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); | |||
6161 | for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); | |||
6162 | ivar; ivar = ivar->getNextIvar()) | |||
6163 | if (ivar->getType().isDestructedType()) | |||
6164 | return true; | |||
6165 | ||||
6166 | return false; | |||
6167 | } | |||
6168 | ||||
6169 | static bool AllTrivialInitializers(CodeGenModule &CGM, | |||
6170 | ObjCImplementationDecl *D) { | |||
6171 | CodeGenFunction CGF(CGM); | |||
6172 | for (ObjCImplementationDecl::init_iterator B = D->init_begin(), | |||
6173 | E = D->init_end(); B != E; ++B) { | |||
6174 | CXXCtorInitializer *CtorInitExp = *B; | |||
6175 | Expr *Init = CtorInitExp->getInit(); | |||
6176 | if (!CGF.isTrivialInitializer(Init)) | |||
6177 | return false; | |||
6178 | } | |||
6179 | return true; | |||
6180 | } | |||
6181 | ||||
6182 | /// EmitObjCIvarInitializations - Emit information for ivar initialization | |||
6183 | /// for an implementation. | |||
6184 | void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { | |||
6185 | // We might need a .cxx_destruct even if we don't have any ivar initializers. | |||
6186 | if (needsDestructMethod(D)) { | |||
6187 | IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); | |||
6188 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); | |||
6189 | ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create( | |||
6190 | getContext(), D->getLocation(), D->getLocation(), cxxSelector, | |||
6191 | getContext().VoidTy, nullptr, D, | |||
6192 | /*isInstance=*/true, /*isVariadic=*/false, | |||
6193 | /*isPropertyAccessor=*/true, /*isSynthesizedAccessorStub=*/false, | |||
6194 | /*isImplicitlyDeclared=*/true, | |||
6195 | /*isDefined=*/false, ObjCMethodDecl::Required); | |||
6196 | D->addInstanceMethod(DTORMethod); | |||
6197 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); | |||
6198 | D->setHasDestructors(true); | |||
6199 | } | |||
6200 | ||||
6201 | // If the implementation doesn't have any ivar initializers, we don't need | |||
6202 | // a .cxx_construct. | |||
6203 | if (D->getNumIvarInitializers() == 0 || | |||
6204 | AllTrivialInitializers(*this, D)) | |||
6205 | return; | |||
6206 | ||||
6207 | IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); | |||
6208 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); | |||
6209 | // The constructor returns 'self'. | |||
6210 | ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create( | |||
6211 | getContext(), D->getLocation(), D->getLocation(), cxxSelector, | |||
6212 | getContext().getObjCIdType(), nullptr, D, /*isInstance=*/true, | |||
6213 | /*isVariadic=*/false, | |||
6214 | /*isPropertyAccessor=*/true, /*isSynthesizedAccessorStub=*/false, | |||
6215 | /*isImplicitlyDeclared=*/true, | |||
6216 | /*isDefined=*/false, ObjCMethodDecl::Required); | |||
6217 | D->addInstanceMethod(CTORMethod); | |||
6218 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); | |||
6219 | D->setHasNonZeroConstructors(true); | |||
6220 | } | |||
6221 | ||||
6222 | // EmitLinkageSpec - Emit all declarations in a linkage spec. | |||
6223 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { | |||
6224 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && | |||
6225 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { | |||
6226 | ErrorUnsupported(LSD, "linkage spec"); | |||
6227 | return; | |||
6228 | } | |||
6229 | ||||
6230 | EmitDeclContext(LSD); | |||
6231 | } | |||
6232 | ||||
6233 | void CodeGenModule::EmitTopLevelStmt(const TopLevelStmtDecl *D) { | |||
6234 | std::unique_ptr<CodeGenFunction> &CurCGF = | |||
6235 | GlobalTopLevelStmtBlockInFlight.first; | |||
6236 | ||||
6237 | // We emitted a top-level stmt but after it there is initialization. | |||
6238 | // Stop squashing the top-level stmts into a single function. | |||
6239 | if (CurCGF && CXXGlobalInits.back() != CurCGF->CurFn) { | |||
6240 | CurCGF->FinishFunction(D->getEndLoc()); | |||
6241 | CurCGF = nullptr; | |||
6242 | } | |||
6243 | ||||
6244 | if (!CurCGF) { | |||
6245 | // void __stmts__N(void) | |||
6246 | // FIXME: Ask the ABI name mangler to pick a name. | |||
6247 | std::string Name = "__stmts__" + llvm::utostr(CXXGlobalInits.size()); | |||
6248 | FunctionArgList Args; | |||
6249 | QualType RetTy = getContext().VoidTy; | |||
6250 | const CGFunctionInfo &FnInfo = | |||
6251 | getTypes().arrangeBuiltinFunctionDeclaration(RetTy, Args); | |||
6252 | llvm::FunctionType *FnTy = getTypes().GetFunctionType(FnInfo); | |||
6253 | llvm::Function *Fn = llvm::Function::Create( | |||
6254 | FnTy, llvm::GlobalValue::InternalLinkage, Name, &getModule()); | |||
6255 | ||||
6256 | CurCGF.reset(new CodeGenFunction(*this)); | |||
6257 | GlobalTopLevelStmtBlockInFlight.second = D; | |||
6258 | CurCGF->StartFunction(GlobalDecl(), RetTy, Fn, FnInfo, Args, | |||
6259 | D->getBeginLoc(), D->getBeginLoc()); | |||
6260 | CXXGlobalInits.push_back(Fn); | |||
6261 | } | |||
6262 | ||||
6263 | CurCGF->EmitStmt(D->getStmt()); | |||
6264 | } | |||
6265 | ||||
6266 | void CodeGenModule::EmitDeclContext(const DeclContext *DC) { | |||
6267 | for (auto *I : DC->decls()) { | |||
6268 | // Unlike other DeclContexts, the contents of an ObjCImplDecl at TU scope | |||
6269 | // are themselves considered "top-level", so EmitTopLevelDecl on an | |||
6270 | // ObjCImplDecl does not recursively visit them. We need to do that in | |||
6271 | // case they're nested inside another construct (LinkageSpecDecl / | |||
6272 | // ExportDecl) that does stop them from being considered "top-level". | |||
6273 | if (auto *OID = dyn_cast<ObjCImplDecl>(I)) { | |||
6274 | for (auto *M : OID->methods()) | |||
6275 | EmitTopLevelDecl(M); | |||
6276 | } | |||
6277 | ||||
6278 | EmitTopLevelDecl(I); | |||
6279 | } | |||
6280 | } | |||
6281 | ||||
6282 | /// EmitTopLevelDecl - Emit code for a single top level declaration. | |||
6283 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { | |||
6284 | // Ignore dependent declarations. | |||
6285 | if (D->isTemplated()) | |||
6286 | return; | |||
6287 | ||||
6288 | // Consteval function shouldn't be emitted. | |||
6289 | if (auto *FD = dyn_cast<FunctionDecl>(D)) | |||
6290 | if (FD->isConsteval()) | |||
6291 | return; | |||
6292 | ||||
6293 | switch (D->getKind()) { | |||
6294 | case Decl::CXXConversion: | |||
6295 | case Decl::CXXMethod: | |||
6296 | case Decl::Function: | |||
6297 | EmitGlobal(cast<FunctionDecl>(D)); | |||
6298 | // Always provide some coverage mapping | |||
6299 | // even for the functions that aren't emitted. | |||
6300 | AddDeferredUnusedCoverageMapping(D); | |||
6301 | break; | |||
6302 | ||||
6303 | case Decl::CXXDeductionGuide: | |||
6304 | // Function-like, but does not result in code emission. | |||
6305 | break; | |||
6306 | ||||
6307 | case Decl::Var: | |||
6308 | case Decl::Decomposition: | |||
6309 | case Decl::VarTemplateSpecialization: | |||
6310 | EmitGlobal(cast<VarDecl>(D)); | |||
6311 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) | |||
6312 | for (auto *B : DD->bindings()) | |||
6313 | if (auto *HD = B->getHoldingVar()) | |||
6314 | EmitGlobal(HD); | |||
6315 | break; | |||
6316 | ||||
6317 | // Indirect fields from global anonymous structs and unions can be | |||
6318 | // ignored; only the actual variable requires IR gen support. | |||
6319 | case Decl::IndirectField: | |||
6320 | break; | |||
6321 | ||||
6322 | // C++ Decls | |||
6323 | case Decl::Namespace: | |||
6324 | EmitDeclContext(cast<NamespaceDecl>(D)); | |||
6325 | break; | |||
6326 | case Decl::ClassTemplateSpecialization: { | |||
6327 | const auto *Spec = cast<ClassTemplateSpecializationDecl>(D); | |||
6328 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6329 | if (Spec->getSpecializationKind() == | |||
6330 | TSK_ExplicitInstantiationDefinition && | |||
6331 | Spec->hasDefinition()) | |||
6332 | DI->completeTemplateDefinition(*Spec); | |||
6333 | } [[fallthrough]]; | |||
6334 | case Decl::CXXRecord: { | |||
6335 | CXXRecordDecl *CRD = cast<CXXRecordDecl>(D); | |||
6336 | if (CGDebugInfo *DI = getModuleDebugInfo()) { | |||
6337 | if (CRD->hasDefinition()) | |||
6338 | DI->EmitAndRetainType(getContext().getRecordType(cast<RecordDecl>(D))); | |||
6339 | if (auto *ES = D->getASTContext().getExternalSource()) | |||
6340 | if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never) | |||
6341 | DI->completeUnusedClass(*CRD); | |||
6342 | } | |||
6343 | // Emit any static data members, they may be definitions. | |||
6344 | for (auto *I : CRD->decls()) | |||
6345 | if (isa<VarDecl>(I) || isa<CXXRecordDecl>(I)) | |||
6346 | EmitTopLevelDecl(I); | |||
6347 | break; | |||
6348 | } | |||
6349 | // No code generation needed. | |||
6350 | case Decl::UsingShadow: | |||
6351 | case Decl::ClassTemplate: | |||
6352 | case Decl::VarTemplate: | |||
6353 | case Decl::Concept: | |||
6354 | case Decl::VarTemplatePartialSpecialization: | |||
6355 | case Decl::FunctionTemplate: | |||
6356 | case Decl::TypeAliasTemplate: | |||
6357 | case Decl::Block: | |||
6358 | case Decl::Empty: | |||
6359 | case Decl::Binding: | |||
6360 | break; | |||
6361 | case Decl::Using: // using X; [C++] | |||
6362 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6363 | DI->EmitUsingDecl(cast<UsingDecl>(*D)); | |||
6364 | break; | |||
6365 | case Decl::UsingEnum: // using enum X; [C++] | |||
6366 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6367 | DI->EmitUsingEnumDecl(cast<UsingEnumDecl>(*D)); | |||
6368 | break; | |||
6369 | case Decl::NamespaceAlias: | |||
6370 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6371 | DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(*D)); | |||
6372 | break; | |||
6373 | case Decl::UsingDirective: // using namespace X; [C++] | |||
6374 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6375 | DI->EmitUsingDirective(cast<UsingDirectiveDecl>(*D)); | |||
6376 | break; | |||
6377 | case Decl::CXXConstructor: | |||
6378 | getCXXABI().EmitCXXConstructors(cast<CXXConstructorDecl>(D)); | |||
6379 | break; | |||
6380 | case Decl::CXXDestructor: | |||
6381 | getCXXABI().EmitCXXDestructors(cast<CXXDestructorDecl>(D)); | |||
6382 | break; | |||
6383 | ||||
6384 | case Decl::StaticAssert: | |||
6385 | // Nothing to do. | |||
6386 | break; | |||
6387 | ||||
6388 | // Objective-C Decls | |||
6389 | ||||
6390 | // Forward declarations, no (immediate) code generation. | |||
6391 | case Decl::ObjCInterface: | |||
6392 | case Decl::ObjCCategory: | |||
6393 | break; | |||
6394 | ||||
6395 | case Decl::ObjCProtocol: { | |||
6396 | auto *Proto = cast<ObjCProtocolDecl>(D); | |||
6397 | if (Proto->isThisDeclarationADefinition()) | |||
6398 | ObjCRuntime->GenerateProtocol(Proto); | |||
6399 | break; | |||
6400 | } | |||
6401 | ||||
6402 | case Decl::ObjCCategoryImpl: | |||
6403 | // Categories have properties but don't support synthesize so we | |||
6404 | // can ignore them here. | |||
6405 | ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); | |||
6406 | break; | |||
6407 | ||||
6408 | case Decl::ObjCImplementation: { | |||
6409 | auto *OMD = cast<ObjCImplementationDecl>(D); | |||
6410 | EmitObjCPropertyImplementations(OMD); | |||
6411 | EmitObjCIvarInitializations(OMD); | |||
6412 | ObjCRuntime->GenerateClass(OMD); | |||
6413 | // Emit global variable debug information. | |||
6414 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6415 | if (getCodeGenOpts().hasReducedDebugInfo()) | |||
6416 | DI->getOrCreateInterfaceType(getContext().getObjCInterfaceType( | |||
6417 | OMD->getClassInterface()), OMD->getLocation()); | |||
6418 | break; | |||
6419 | } | |||
6420 | case Decl::ObjCMethod: { | |||
6421 | auto *OMD = cast<ObjCMethodDecl>(D); | |||
6422 | // If this is not a prototype, emit the body. | |||
6423 | if (OMD->getBody()) | |||
6424 | CodeGenFunction(*this).GenerateObjCMethod(OMD); | |||
6425 | break; | |||
6426 | } | |||
6427 | case Decl::ObjCCompatibleAlias: | |||
6428 | ObjCRuntime->RegisterAlias(cast<ObjCCompatibleAliasDecl>(D)); | |||
6429 | break; | |||
6430 | ||||
6431 | case Decl::PragmaComment: { | |||
6432 | const auto *PCD = cast<PragmaCommentDecl>(D); | |||
6433 | switch (PCD->getCommentKind()) { | |||
6434 | case PCK_Unknown: | |||
6435 | llvm_unreachable("unexpected pragma comment kind")::llvm::llvm_unreachable_internal("unexpected pragma comment kind" , "clang/lib/CodeGen/CodeGenModule.cpp", 6435); | |||
6436 | case PCK_Linker: | |||
6437 | AppendLinkerOptions(PCD->getArg()); | |||
6438 | break; | |||
6439 | case PCK_Lib: | |||
6440 | AddDependentLib(PCD->getArg()); | |||
6441 | break; | |||
6442 | case PCK_Compiler: | |||
6443 | case PCK_ExeStr: | |||
6444 | case PCK_User: | |||
6445 | break; // We ignore all of these. | |||
6446 | } | |||
6447 | break; | |||
6448 | } | |||
6449 | ||||
6450 | case Decl::PragmaDetectMismatch: { | |||
6451 | const auto *PDMD = cast<PragmaDetectMismatchDecl>(D); | |||
6452 | AddDetectMismatch(PDMD->getName(), PDMD->getValue()); | |||
6453 | break; | |||
6454 | } | |||
6455 | ||||
6456 | case Decl::LinkageSpec: | |||
6457 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); | |||
6458 | break; | |||
6459 | ||||
6460 | case Decl::FileScopeAsm: { | |||
6461 | // File-scope asm is ignored during device-side CUDA compilation. | |||
6462 | if (LangOpts.CUDA && LangOpts.CUDAIsDevice) | |||
6463 | break; | |||
6464 | // File-scope asm is ignored during device-side OpenMP compilation. | |||
6465 | if (LangOpts.OpenMPIsDevice) | |||
6466 | break; | |||
6467 | // File-scope asm is ignored during device-side SYCL compilation. | |||
6468 | if (LangOpts.SYCLIsDevice) | |||
6469 | break; | |||
6470 | auto *AD = cast<FileScopeAsmDecl>(D); | |||
6471 | getModule().appendModuleInlineAsm(AD->getAsmString()->getString()); | |||
6472 | break; | |||
6473 | } | |||
6474 | ||||
6475 | case Decl::TopLevelStmt: | |||
6476 | EmitTopLevelStmt(cast<TopLevelStmtDecl>(D)); | |||
6477 | break; | |||
6478 | ||||
6479 | case Decl::Import: { | |||
6480 | auto *Import = cast<ImportDecl>(D); | |||
6481 | ||||
6482 | // If we've already imported this module, we're done. | |||
6483 | if (!ImportedModules.insert(Import->getImportedModule())) | |||
6484 | break; | |||
6485 | ||||
6486 | // Emit debug information for direct imports. | |||
6487 | if (!Import->getImportedOwningModule()) { | |||
6488 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6489 | DI->EmitImportDecl(*Import); | |||
6490 | } | |||
6491 | ||||
6492 | // For C++ standard modules we are done - we will call the module | |||
6493 | // initializer for imported modules, and that will likewise call those for | |||
6494 | // any imports it has. | |||
6495 | if (CXX20ModuleInits && Import->getImportedOwningModule() && | |||
6496 | !Import->getImportedOwningModule()->isModuleMapModule()) | |||
6497 | break; | |||
6498 | ||||
6499 | // For clang C++ module map modules the initializers for sub-modules are | |||
6500 | // emitted here. | |||
6501 | ||||
6502 | // Find all of the submodules and emit the module initializers. | |||
6503 | llvm::SmallPtrSet<clang::Module *, 16> Visited; | |||
6504 | SmallVector<clang::Module *, 16> Stack; | |||
6505 | Visited.insert(Import->getImportedModule()); | |||
6506 | Stack.push_back(Import->getImportedModule()); | |||
6507 | ||||
6508 | while (!Stack.empty()) { | |||
6509 | clang::Module *Mod = Stack.pop_back_val(); | |||
6510 | if (!EmittedModuleInitializers.insert(Mod).second) | |||
6511 | continue; | |||
6512 | ||||
6513 | for (auto *D : Context.getModuleInitializers(Mod)) | |||
6514 | EmitTopLevelDecl(D); | |||
6515 | ||||
6516 | // Visit the submodules of this module. | |||
6517 | for (clang::Module::submodule_iterator Sub = Mod->submodule_begin(), | |||
6518 | SubEnd = Mod->submodule_end(); | |||
6519 | Sub != SubEnd; ++Sub) { | |||
6520 | // Skip explicit children; they need to be explicitly imported to emit | |||
6521 | // the initializers. | |||
6522 | if ((*Sub)->IsExplicit) | |||
6523 | continue; | |||
6524 | ||||
6525 | if (Visited.insert(*Sub).second) | |||
6526 | Stack.push_back(*Sub); | |||
6527 | } | |||
6528 | } | |||
6529 | break; | |||
6530 | } | |||
6531 | ||||
6532 | case Decl::Export: | |||
6533 | EmitDeclContext(cast<ExportDecl>(D)); | |||
6534 | break; | |||
6535 | ||||
6536 | case Decl::OMPThreadPrivate: | |||
6537 | EmitOMPThreadPrivateDecl(cast<OMPThreadPrivateDecl>(D)); | |||
6538 | break; | |||
6539 | ||||
6540 | case Decl::OMPAllocate: | |||
6541 | EmitOMPAllocateDecl(cast<OMPAllocateDecl>(D)); | |||
6542 | break; | |||
6543 | ||||
6544 | case Decl::OMPDeclareReduction: | |||
6545 | EmitOMPDeclareReduction(cast<OMPDeclareReductionDecl>(D)); | |||
6546 | break; | |||
6547 | ||||
6548 | case Decl::OMPDeclareMapper: | |||
6549 | EmitOMPDeclareMapper(cast<OMPDeclareMapperDecl>(D)); | |||
6550 | break; | |||
6551 | ||||
6552 | case Decl::OMPRequires: | |||
6553 | EmitOMPRequiresDecl(cast<OMPRequiresDecl>(D)); | |||
6554 | break; | |||
6555 | ||||
6556 | case Decl::Typedef: | |||
6557 | case Decl::TypeAlias: // using foo = bar; [C++11] | |||
6558 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6559 | DI->EmitAndRetainType( | |||
6560 | getContext().getTypedefType(cast<TypedefNameDecl>(D))); | |||
6561 | break; | |||
6562 | ||||
6563 | case Decl::Record: | |||
6564 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6565 | if (cast<RecordDecl>(D)->getDefinition()) | |||
6566 | DI->EmitAndRetainType(getContext().getRecordType(cast<RecordDecl>(D))); | |||
6567 | break; | |||
6568 | ||||
6569 | case Decl::Enum: | |||
6570 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
6571 | if (cast<EnumDecl>(D)->getDefinition()) | |||
6572 | DI->EmitAndRetainType(getContext().getEnumType(cast<EnumDecl>(D))); | |||
6573 | break; | |||
6574 | ||||
6575 | case Decl::HLSLBuffer: | |||
6576 | getHLSLRuntime().addBuffer(cast<HLSLBufferDecl>(D)); | |||
6577 | break; | |||
6578 | ||||
6579 | default: | |||
6580 | // Make sure we handled everything we should, every other kind is a | |||
6581 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind | |||
6582 | // function. Need to recode Decl::Kind to do that easily. | |||
6583 | assert(isa<TypeDecl>(D) && "Unsupported decl kind")(static_cast <bool> (isa<TypeDecl>(D) && "Unsupported decl kind" ) ? void (0) : __assert_fail ("isa<TypeDecl>(D) && \"Unsupported decl kind\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 6583, __extension__ __PRETTY_FUNCTION__ )); | |||
6584 | break; | |||
6585 | } | |||
6586 | } | |||
6587 | ||||
6588 | void CodeGenModule::AddDeferredUnusedCoverageMapping(Decl *D) { | |||
6589 | // Do we need to generate coverage mapping? | |||
6590 | if (!CodeGenOpts.CoverageMapping) | |||
6591 | return; | |||
6592 | switch (D->getKind()) { | |||
6593 | case Decl::CXXConversion: | |||
6594 | case Decl::CXXMethod: | |||
6595 | case Decl::Function: | |||
6596 | case Decl::ObjCMethod: | |||
6597 | case Decl::CXXConstructor: | |||
6598 | case Decl::CXXDestructor: { | |||
6599 | if (!cast<FunctionDecl>(D)->doesThisDeclarationHaveABody()) | |||
6600 | break; | |||
6601 | SourceManager &SM = getContext().getSourceManager(); | |||
6602 | if (LimitedCoverage && SM.getMainFileID() != SM.getFileID(D->getBeginLoc())) | |||
6603 | break; | |||
6604 | auto I = DeferredEmptyCoverageMappingDecls.find(D); | |||
6605 | if (I == DeferredEmptyCoverageMappingDecls.end()) | |||
6606 | DeferredEmptyCoverageMappingDecls[D] = true; | |||
6607 | break; | |||
6608 | } | |||
6609 | default: | |||
6610 | break; | |||
6611 | }; | |||
6612 | } | |||
6613 | ||||
6614 | void CodeGenModule::ClearUnusedCoverageMapping(const Decl *D) { | |||
6615 | // Do we need to generate coverage mapping? | |||
6616 | if (!CodeGenOpts.CoverageMapping) | |||
6617 | return; | |||
6618 | if (const auto *Fn = dyn_cast<FunctionDecl>(D)) { | |||
6619 | if (Fn->isTemplateInstantiation()) | |||
6620 | ClearUnusedCoverageMapping(Fn->getTemplateInstantiationPattern()); | |||
6621 | } | |||
6622 | auto I = DeferredEmptyCoverageMappingDecls.find(D); | |||
6623 | if (I == DeferredEmptyCoverageMappingDecls.end()) | |||
6624 | DeferredEmptyCoverageMappingDecls[D] = false; | |||
6625 | else | |||
6626 | I->second = false; | |||
6627 | } | |||
6628 | ||||
6629 | void CodeGenModule::EmitDeferredUnusedCoverageMappings() { | |||
6630 | // We call takeVector() here to avoid use-after-free. | |||
6631 | // FIXME: DeferredEmptyCoverageMappingDecls is getting mutated because | |||
6632 | // we deserialize function bodies to emit coverage info for them, and that | |||
6633 | // deserializes more declarations. How should we handle that case? | |||
6634 | for (const auto &Entry : DeferredEmptyCoverageMappingDecls.takeVector()) { | |||
6635 | if (!Entry.second) | |||
6636 | continue; | |||
6637 | const Decl *D = Entry.first; | |||
6638 | switch (D->getKind()) { | |||
6639 | case Decl::CXXConversion: | |||
6640 | case Decl::CXXMethod: | |||
6641 | case Decl::Function: | |||
6642 | case Decl::ObjCMethod: { | |||
6643 | CodeGenPGO PGO(*this); | |||
6644 | GlobalDecl GD(cast<FunctionDecl>(D)); | |||
6645 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
6646 | getFunctionLinkage(GD)); | |||
6647 | break; | |||
6648 | } | |||
6649 | case Decl::CXXConstructor: { | |||
6650 | CodeGenPGO PGO(*this); | |||
6651 | GlobalDecl GD(cast<CXXConstructorDecl>(D), Ctor_Base); | |||
6652 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
6653 | getFunctionLinkage(GD)); | |||
6654 | break; | |||
6655 | } | |||
6656 | case Decl::CXXDestructor: { | |||
6657 | CodeGenPGO PGO(*this); | |||
6658 | GlobalDecl GD(cast<CXXDestructorDecl>(D), Dtor_Base); | |||
6659 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
6660 | getFunctionLinkage(GD)); | |||
6661 | break; | |||
6662 | } | |||
6663 | default: | |||
6664 | break; | |||
6665 | }; | |||
6666 | } | |||
6667 | } | |||
6668 | ||||
6669 | void CodeGenModule::EmitMainVoidAlias() { | |||
6670 | // In order to transition away from "__original_main" gracefully, emit an | |||
6671 | // alias for "main" in the no-argument case so that libc can detect when | |||
6672 | // new-style no-argument main is in used. | |||
6673 | if (llvm::Function *F = getModule().getFunction("main")) { | |||
6674 | if (!F->isDeclaration() && F->arg_size() == 0 && !F->isVarArg() && | |||
6675 | F->getReturnType()->isIntegerTy(Context.getTargetInfo().getIntWidth())) { | |||
6676 | auto *GA = llvm::GlobalAlias::create("__main_void", F); | |||
6677 | GA->setVisibility(llvm::GlobalValue::HiddenVisibility); | |||
6678 | } | |||
6679 | } | |||
6680 | } | |||
6681 | ||||
6682 | /// Turns the given pointer into a constant. | |||
6683 | static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, | |||
6684 | const void *Ptr) { | |||
6685 | uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); | |||
6686 | llvm::Type *i64 = llvm::Type::getInt64Ty(Context); | |||
6687 | return llvm::ConstantInt::get(i64, PtrInt); | |||
6688 | } | |||
6689 | ||||
6690 | static void EmitGlobalDeclMetadata(CodeGenModule &CGM, | |||
6691 | llvm::NamedMDNode *&GlobalMetadata, | |||
6692 | GlobalDecl D, | |||
6693 | llvm::GlobalValue *Addr) { | |||
6694 | if (!GlobalMetadata) | |||
6695 | GlobalMetadata = | |||
6696 | CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); | |||
6697 | ||||
6698 | // TODO: should we report variant information for ctors/dtors? | |||
6699 | llvm::Metadata *Ops[] = {llvm::ConstantAsMetadata::get(Addr), | |||
6700 | llvm::ConstantAsMetadata::get(GetPointerConstant( | |||
6701 | CGM.getLLVMContext(), D.getDecl()))}; | |||
6702 | GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); | |||
6703 | } | |||
6704 | ||||
6705 | bool CodeGenModule::CheckAndReplaceExternCIFuncs(llvm::GlobalValue *Elem, | |||
6706 | llvm::GlobalValue *CppFunc) { | |||
6707 | // Store the list of ifuncs we need to replace uses in. | |||
6708 | llvm::SmallVector<llvm::GlobalIFunc *> IFuncs; | |||
6709 | // List of ConstantExprs that we should be able to delete when we're done | |||
6710 | // here. | |||
6711 | llvm::SmallVector<llvm::ConstantExpr *> CEs; | |||
6712 | ||||
6713 | // It isn't valid to replace the extern-C ifuncs if all we find is itself! | |||
6714 | if (Elem == CppFunc) | |||
6715 | return false; | |||
6716 | ||||
6717 | // First make sure that all users of this are ifuncs (or ifuncs via a | |||
6718 | // bitcast), and collect the list of ifuncs and CEs so we can work on them | |||
6719 | // later. | |||
6720 | for (llvm::User *User : Elem->users()) { | |||
6721 | // Users can either be a bitcast ConstExpr that is used by the ifuncs, OR an | |||
6722 | // ifunc directly. In any other case, just give up, as we don't know what we | |||
6723 | // could break by changing those. | |||
6724 | if (auto *ConstExpr = dyn_cast<llvm::ConstantExpr>(User)) { | |||
6725 | if (ConstExpr->getOpcode() != llvm::Instruction::BitCast) | |||
6726 | return false; | |||
6727 | ||||
6728 | for (llvm::User *CEUser : ConstExpr->users()) { | |||
6729 | if (auto *IFunc = dyn_cast<llvm::GlobalIFunc>(CEUser)) { | |||
6730 | IFuncs.push_back(IFunc); | |||
6731 | } else { | |||
6732 | return false; | |||
6733 | } | |||
6734 | } | |||
6735 | CEs.push_back(ConstExpr); | |||
6736 | } else if (auto *IFunc = dyn_cast<llvm::GlobalIFunc>(User)) { | |||
6737 | IFuncs.push_back(IFunc); | |||
6738 | } else { | |||
6739 | // This user is one we don't know how to handle, so fail redirection. This | |||
6740 | // will result in an ifunc retaining a resolver name that will ultimately | |||
6741 | // fail to be resolved to a defined function. | |||
6742 | return false; | |||
6743 | } | |||
6744 | } | |||
6745 | ||||
6746 | // Now we know this is a valid case where we can do this alias replacement, we | |||
6747 | // need to remove all of the references to Elem (and the bitcasts!) so we can | |||
6748 | // delete it. | |||
6749 | for (llvm::GlobalIFunc *IFunc : IFuncs) | |||
6750 | IFunc->setResolver(nullptr); | |||
6751 | for (llvm::ConstantExpr *ConstExpr : CEs) | |||
6752 | ConstExpr->destroyConstant(); | |||
6753 | ||||
6754 | // We should now be out of uses for the 'old' version of this function, so we | |||
6755 | // can erase it as well. | |||
6756 | Elem->eraseFromParent(); | |||
6757 | ||||
6758 | for (llvm::GlobalIFunc *IFunc : IFuncs) { | |||
6759 | // The type of the resolver is always just a function-type that returns the | |||
6760 | // type of the IFunc, so create that here. If the type of the actual | |||
6761 | // resolver doesn't match, it just gets bitcast to the right thing. | |||
6762 | auto *ResolverTy = | |||
6763 | llvm::FunctionType::get(IFunc->getType(), /*isVarArg*/ false); | |||
6764 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
6765 | CppFunc->getName(), ResolverTy, {}, /*ForVTable*/ false); | |||
6766 | IFunc->setResolver(Resolver); | |||
6767 | } | |||
6768 | return true; | |||
6769 | } | |||
6770 | ||||
6771 | /// For each function which is declared within an extern "C" region and marked | |||
6772 | /// as 'used', but has internal linkage, create an alias from the unmangled | |||
6773 | /// name to the mangled name if possible. People expect to be able to refer | |||
6774 | /// to such functions with an unmangled name from inline assembly within the | |||
6775 | /// same translation unit. | |||
6776 | void CodeGenModule::EmitStaticExternCAliases() { | |||
6777 | if (!getTargetCodeGenInfo().shouldEmitStaticExternCAliases()) | |||
6778 | return; | |||
6779 | for (auto &I : StaticExternCValues) { | |||
6780 | IdentifierInfo *Name = I.first; | |||
6781 | llvm::GlobalValue *Val = I.second; | |||
6782 | ||||
6783 | // If Val is null, that implies there were multiple declarations that each | |||
6784 | // had a claim to the unmangled name. In this case, generation of the alias | |||
6785 | // is suppressed. See CodeGenModule::MaybeHandleStaticInExternC. | |||
6786 | if (!Val) | |||
6787 | break; | |||
6788 | ||||
6789 | llvm::GlobalValue *ExistingElem = | |||
6790 | getModule().getNamedValue(Name->getName()); | |||
6791 | ||||
6792 | // If there is either not something already by this name, or we were able to | |||
6793 | // replace all uses from IFuncs, create the alias. | |||
6794 | if (!ExistingElem || CheckAndReplaceExternCIFuncs(ExistingElem, Val)) | |||
6795 | addCompilerUsedGlobal(llvm::GlobalAlias::create(Name->getName(), Val)); | |||
6796 | } | |||
6797 | } | |||
6798 | ||||
6799 | bool CodeGenModule::lookupRepresentativeDecl(StringRef MangledName, | |||
6800 | GlobalDecl &Result) const { | |||
6801 | auto Res = Manglings.find(MangledName); | |||
6802 | if (Res == Manglings.end()) | |||
6803 | return false; | |||
6804 | Result = Res->getValue(); | |||
6805 | return true; | |||
6806 | } | |||
6807 | ||||
6808 | /// Emits metadata nodes associating all the global values in the | |||
6809 | /// current module with the Decls they came from. This is useful for | |||
6810 | /// projects using IR gen as a subroutine. | |||
6811 | /// | |||
6812 | /// Since there's currently no way to associate an MDNode directly | |||
6813 | /// with an llvm::GlobalValue, we create a global named metadata | |||
6814 | /// with the name 'clang.global.decl.ptrs'. | |||
6815 | void CodeGenModule::EmitDeclMetadata() { | |||
6816 | llvm::NamedMDNode *GlobalMetadata = nullptr; | |||
6817 | ||||
6818 | for (auto &I : MangledDeclNames) { | |||
6819 | llvm::GlobalValue *Addr = getModule().getNamedValue(I.second); | |||
6820 | // Some mangled names don't necessarily have an associated GlobalValue | |||
6821 | // in this module, e.g. if we mangled it for DebugInfo. | |||
6822 | if (Addr) | |||
6823 | EmitGlobalDeclMetadata(*this, GlobalMetadata, I.first, Addr); | |||
6824 | } | |||
6825 | } | |||
6826 | ||||
6827 | /// Emits metadata nodes for all the local variables in the current | |||
6828 | /// function. | |||
6829 | void CodeGenFunction::EmitDeclMetadata() { | |||
6830 | if (LocalDeclMap.empty()) return; | |||
6831 | ||||
6832 | llvm::LLVMContext &Context = getLLVMContext(); | |||
6833 | ||||
6834 | // Find the unique metadata ID for this name. | |||
6835 | unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); | |||
6836 | ||||
6837 | llvm::NamedMDNode *GlobalMetadata = nullptr; | |||
6838 | ||||
6839 | for (auto &I : LocalDeclMap) { | |||
6840 | const Decl *D = I.first; | |||
6841 | llvm::Value *Addr = I.second.getPointer(); | |||
6842 | if (auto *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { | |||
6843 | llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); | |||
6844 | Alloca->setMetadata( | |||
6845 | DeclPtrKind, llvm::MDNode::get( | |||
6846 | Context, llvm::ValueAsMetadata::getConstant(DAddr))); | |||
6847 | } else if (auto *GV = dyn_cast<llvm::GlobalValue>(Addr)) { | |||
6848 | GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); | |||
6849 | EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); | |||
6850 | } | |||
6851 | } | |||
6852 | } | |||
6853 | ||||
6854 | void CodeGenModule::EmitVersionIdentMetadata() { | |||
6855 | llvm::NamedMDNode *IdentMetadata = | |||
6856 | TheModule.getOrInsertNamedMetadata("llvm.ident"); | |||
6857 | std::string Version = getClangFullVersion(); | |||
6858 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
6859 | ||||
6860 | llvm::Metadata *IdentNode[] = {llvm::MDString::get(Ctx, Version)}; | |||
6861 | IdentMetadata->addOperand(llvm::MDNode::get(Ctx, IdentNode)); | |||
6862 | } | |||
6863 | ||||
6864 | void CodeGenModule::EmitCommandLineMetadata() { | |||
6865 | llvm::NamedMDNode *CommandLineMetadata = | |||
6866 | TheModule.getOrInsertNamedMetadata("llvm.commandline"); | |||
6867 | std::string CommandLine = getCodeGenOpts().RecordCommandLine; | |||
6868 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
6869 | ||||
6870 | llvm::Metadata *CommandLineNode[] = {llvm::MDString::get(Ctx, CommandLine)}; | |||
6871 | CommandLineMetadata->addOperand(llvm::MDNode::get(Ctx, CommandLineNode)); | |||
6872 | } | |||
6873 | ||||
6874 | void CodeGenModule::EmitCoverageFile() { | |||
6875 | if (getCodeGenOpts().CoverageDataFile.empty() && | |||
6876 | getCodeGenOpts().CoverageNotesFile.empty()) | |||
6877 | return; | |||
6878 | ||||
6879 | llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu"); | |||
6880 | if (!CUNode) | |||
6881 | return; | |||
6882 | ||||
6883 | llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); | |||
6884 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
6885 | auto *CoverageDataFile = | |||
6886 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageDataFile); | |||
6887 | auto *CoverageNotesFile = | |||
6888 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageNotesFile); | |||
6889 | for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { | |||
6890 | llvm::MDNode *CU = CUNode->getOperand(i); | |||
6891 | llvm::Metadata *Elts[] = {CoverageNotesFile, CoverageDataFile, CU}; | |||
6892 | GCov->addOperand(llvm::MDNode::get(Ctx, Elts)); | |||
6893 | } | |||
6894 | } | |||
6895 | ||||
6896 | llvm::Constant *CodeGenModule::GetAddrOfRTTIDescriptor(QualType Ty, | |||
6897 | bool ForEH) { | |||
6898 | // Return a bogus pointer if RTTI is disabled, unless it's for EH. | |||
6899 | // FIXME: should we even be calling this method if RTTI is disabled | |||
6900 | // and it's not for EH? | |||
6901 | if ((!ForEH && !getLangOpts().RTTI) || getLangOpts().CUDAIsDevice || | |||
6902 | (getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && | |||
6903 | getTriple().isNVPTX())) | |||
6904 | return llvm::Constant::getNullValue(Int8PtrTy); | |||
6905 | ||||
6906 | if (ForEH && Ty->isObjCObjectPointerType() && | |||
6907 | LangOpts.ObjCRuntime.isGNUFamily()) | |||
6908 | return ObjCRuntime->GetEHType(Ty); | |||
6909 | ||||
6910 | return getCXXABI().getAddrOfRTTIDescriptor(Ty); | |||
6911 | } | |||
6912 | ||||
6913 | void CodeGenModule::EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D) { | |||
6914 | // Do not emit threadprivates in simd-only mode. | |||
6915 | if (LangOpts.OpenMP && LangOpts.OpenMPSimd) | |||
6916 | return; | |||
6917 | for (auto RefExpr : D->varlists()) { | |||
6918 | auto *VD = cast<VarDecl>(cast<DeclRefExpr>(RefExpr)->getDecl()); | |||
6919 | bool PerformInit = | |||
6920 | VD->getAnyInitializer() && | |||
6921 | !VD->getAnyInitializer()->isConstantInitializer(getContext(), | |||
6922 | /*ForRef=*/false); | |||
6923 | ||||
6924 | Address Addr(GetAddrOfGlobalVar(VD), | |||
6925 | getTypes().ConvertTypeForMem(VD->getType()), | |||
6926 | getContext().getDeclAlign(VD)); | |||
6927 | if (auto InitFunction = getOpenMPRuntime().emitThreadPrivateVarDefinition( | |||
6928 | VD, Addr, RefExpr->getBeginLoc(), PerformInit)) | |||
6929 | CXXGlobalInits.push_back(InitFunction); | |||
6930 | } | |||
6931 | } | |||
6932 | ||||
6933 | llvm::Metadata * | |||
6934 | CodeGenModule::CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map, | |||
6935 | StringRef Suffix) { | |||
6936 | if (auto *FnType = T->getAs<FunctionProtoType>()) | |||
6937 | T = getContext().getFunctionType( | |||
6938 | FnType->getReturnType(), FnType->getParamTypes(), | |||
6939 | FnType->getExtProtoInfo().withExceptionSpec(EST_None)); | |||
6940 | ||||
6941 | llvm::Metadata *&InternalId = Map[T.getCanonicalType()]; | |||
6942 | if (InternalId) | |||
6943 | return InternalId; | |||
6944 | ||||
6945 | if (isExternallyVisible(T->getLinkage())) { | |||
6946 | std::string OutName; | |||
6947 | llvm::raw_string_ostream Out(OutName); | |||
6948 | getCXXABI().getMangleContext().mangleTypeName(T, Out); | |||
6949 | Out << Suffix; | |||
6950 | ||||
6951 | InternalId = llvm::MDString::get(getLLVMContext(), Out.str()); | |||
6952 | } else { | |||
6953 | InternalId = llvm::MDNode::getDistinct(getLLVMContext(), | |||
6954 | llvm::ArrayRef<llvm::Metadata *>()); | |||
6955 | } | |||
6956 | ||||
6957 | return InternalId; | |||
6958 | } | |||
6959 | ||||
6960 | llvm::Metadata *CodeGenModule::CreateMetadataIdentifierForType(QualType T) { | |||
6961 | return CreateMetadataIdentifierImpl(T, MetadataIdMap, ""); | |||
6962 | } | |||
6963 | ||||
6964 | llvm::Metadata * | |||
6965 | CodeGenModule::CreateMetadataIdentifierForVirtualMemPtrType(QualType T) { | |||
6966 | return CreateMetadataIdentifierImpl(T, VirtualMetadataIdMap, ".virtual"); | |||
6967 | } | |||
6968 | ||||
6969 | // Generalize pointer types to a void pointer with the qualifiers of the | |||
6970 | // originally pointed-to type, e.g. 'const char *' and 'char * const *' | |||
6971 | // generalize to 'const void *' while 'char *' and 'const char **' generalize to | |||
6972 | // 'void *'. | |||
6973 | static QualType GeneralizeType(ASTContext &Ctx, QualType Ty) { | |||
6974 | if (!Ty->isPointerType()) | |||
6975 | return Ty; | |||
6976 | ||||
6977 | return Ctx.getPointerType( | |||
6978 | QualType(Ctx.VoidTy).withCVRQualifiers( | |||
6979 | Ty->getPointeeType().getCVRQualifiers())); | |||
6980 | } | |||
6981 | ||||
6982 | // Apply type generalization to a FunctionType's return and argument types | |||
6983 | static QualType GeneralizeFunctionType(ASTContext &Ctx, QualType Ty) { | |||
6984 | if (auto *FnType = Ty->getAs<FunctionProtoType>()) { | |||
6985 | SmallVector<QualType, 8> GeneralizedParams; | |||
6986 | for (auto &Param : FnType->param_types()) | |||
6987 | GeneralizedParams.push_back(GeneralizeType(Ctx, Param)); | |||
6988 | ||||
6989 | return Ctx.getFunctionType( | |||
6990 | GeneralizeType(Ctx, FnType->getReturnType()), | |||
6991 | GeneralizedParams, FnType->getExtProtoInfo()); | |||
6992 | } | |||
6993 | ||||
6994 | if (auto *FnType = Ty->getAs<FunctionNoProtoType>()) | |||
6995 | return Ctx.getFunctionNoProtoType( | |||
6996 | GeneralizeType(Ctx, FnType->getReturnType())); | |||
6997 | ||||
6998 | llvm_unreachable("Encountered unknown FunctionType")::llvm::llvm_unreachable_internal("Encountered unknown FunctionType" , "clang/lib/CodeGen/CodeGenModule.cpp", 6998); | |||
6999 | } | |||
7000 | ||||
7001 | llvm::Metadata *CodeGenModule::CreateMetadataIdentifierGeneralized(QualType T) { | |||
7002 | return CreateMetadataIdentifierImpl(GeneralizeFunctionType(getContext(), T), | |||
7003 | GeneralizedMetadataIdMap, ".generalized"); | |||
7004 | } | |||
7005 | ||||
7006 | /// Returns whether this module needs the "all-vtables" type identifier. | |||
7007 | bool CodeGenModule::NeedAllVtablesTypeId() const { | |||
7008 | // Returns true if at least one of vtable-based CFI checkers is enabled and | |||
7009 | // is not in the trapping mode. | |||
7010 | return ((LangOpts.Sanitize.has(SanitizerKind::CFIVCall) && | |||
7011 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIVCall)) || | |||
7012 | (LangOpts.Sanitize.has(SanitizerKind::CFINVCall) && | |||
7013 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFINVCall)) || | |||
7014 | (LangOpts.Sanitize.has(SanitizerKind::CFIDerivedCast) && | |||
7015 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIDerivedCast)) || | |||
7016 | (LangOpts.Sanitize.has(SanitizerKind::CFIUnrelatedCast) && | |||
7017 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIUnrelatedCast))); | |||
7018 | } | |||
7019 | ||||
7020 | void CodeGenModule::AddVTableTypeMetadata(llvm::GlobalVariable *VTable, | |||
7021 | CharUnits Offset, | |||
7022 | const CXXRecordDecl *RD) { | |||
7023 | llvm::Metadata *MD = | |||
7024 | CreateMetadataIdentifierForType(QualType(RD->getTypeForDecl(), 0)); | |||
7025 | VTable->addTypeMetadata(Offset.getQuantity(), MD); | |||
7026 | ||||
7027 | if (CodeGenOpts.SanitizeCfiCrossDso) | |||
7028 | if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD)) | |||
7029 | VTable->addTypeMetadata(Offset.getQuantity(), | |||
7030 | llvm::ConstantAsMetadata::get(CrossDsoTypeId)); | |||
7031 | ||||
7032 | if (NeedAllVtablesTypeId()) { | |||
7033 | llvm::Metadata *MD = llvm::MDString::get(getLLVMContext(), "all-vtables"); | |||
7034 | VTable->addTypeMetadata(Offset.getQuantity(), MD); | |||
7035 | } | |||
7036 | } | |||
7037 | ||||
7038 | llvm::SanitizerStatReport &CodeGenModule::getSanStats() { | |||
7039 | if (!SanStats) | |||
7040 | SanStats = std::make_unique<llvm::SanitizerStatReport>(&getModule()); | |||
7041 | ||||
7042 | return *SanStats; | |||
7043 | } | |||
7044 | ||||
7045 | llvm::Value * | |||
7046 | CodeGenModule::createOpenCLIntToSamplerConversion(const Expr *E, | |||
7047 | CodeGenFunction &CGF) { | |||
7048 | llvm::Constant *C = ConstantEmitter(CGF).emitAbstract(E, E->getType()); | |||
7049 | auto *SamplerT = getOpenCLRuntime().getSamplerType(E->getType().getTypePtr()); | |||
7050 | auto *FTy = llvm::FunctionType::get(SamplerT, {C->getType()}, false); | |||
7051 | auto *Call = CGF.EmitRuntimeCall( | |||
7052 | CreateRuntimeFunction(FTy, "__translate_sampler_initializer"), {C}); | |||
7053 | return Call; | |||
7054 | } | |||
7055 | ||||
7056 | CharUnits CodeGenModule::getNaturalPointeeTypeAlignment( | |||
7057 | QualType T, LValueBaseInfo *BaseInfo, TBAAAccessInfo *TBAAInfo) { | |||
7058 | return getNaturalTypeAlignment(T->getPointeeType(), BaseInfo, TBAAInfo, | |||
7059 | /* forPointeeType= */ true); | |||
7060 | } | |||
7061 | ||||
7062 | CharUnits CodeGenModule::getNaturalTypeAlignment(QualType T, | |||
7063 | LValueBaseInfo *BaseInfo, | |||
7064 | TBAAAccessInfo *TBAAInfo, | |||
7065 | bool forPointeeType) { | |||
7066 | if (TBAAInfo) | |||
7067 | *TBAAInfo = getTBAAAccessInfo(T); | |||
7068 | ||||
7069 | // FIXME: This duplicates logic in ASTContext::getTypeAlignIfKnown. But | |||
7070 | // that doesn't return the information we need to compute BaseInfo. | |||
7071 | ||||
7072 | // Honor alignment typedef attributes even on incomplete types. | |||
7073 | // We also honor them straight for C++ class types, even as pointees; | |||
7074 | // there's an expressivity gap here. | |||
7075 | if (auto TT = T->getAs<TypedefType>()) { | |||
7076 | if (auto Align = TT->getDecl()->getMaxAlignment()) { | |||
7077 | if (BaseInfo) | |||
7078 | *BaseInfo = LValueBaseInfo(AlignmentSource::AttributedType); | |||
7079 | return getContext().toCharUnitsFromBits(Align); | |||
7080 | } | |||
7081 | } | |||
7082 | ||||
7083 | bool AlignForArray = T->isArrayType(); | |||
7084 | ||||
7085 | // Analyze the base element type, so we don't get confused by incomplete | |||
7086 | // array types. | |||
7087 | T = getContext().getBaseElementType(T); | |||
7088 | ||||
7089 | if (T->isIncompleteType()) { | |||
7090 | // We could try to replicate the logic from | |||
7091 | // ASTContext::getTypeAlignIfKnown, but nothing uses the alignment if the | |||
7092 | // type is incomplete, so it's impossible to test. We could try to reuse | |||
7093 | // getTypeAlignIfKnown, but that doesn't return the information we need | |||
7094 | // to set BaseInfo. So just ignore the possibility that the alignment is | |||
7095 | // greater than one. | |||
7096 | if (BaseInfo) | |||
7097 | *BaseInfo = LValueBaseInfo(AlignmentSource::Type); | |||
7098 | return CharUnits::One(); | |||
7099 | } | |||
7100 | ||||
7101 | if (BaseInfo) | |||
7102 | *BaseInfo = LValueBaseInfo(AlignmentSource::Type); | |||
7103 | ||||
7104 | CharUnits Alignment; | |||
7105 | const CXXRecordDecl *RD; | |||
7106 | if (T.getQualifiers().hasUnaligned()) { | |||
7107 | Alignment = CharUnits::One(); | |||
7108 | } else if (forPointeeType && !AlignForArray && | |||
7109 | (RD = T->getAsCXXRecordDecl())) { | |||
7110 | // For C++ class pointees, we don't know whether we're pointing at a | |||
7111 | // base or a complete object, so we generally need to use the | |||
7112 | // non-virtual alignment. | |||
7113 | Alignment = getClassPointerAlignment(RD); | |||
7114 | } else { | |||
7115 | Alignment = getContext().getTypeAlignInChars(T); | |||
7116 | } | |||
7117 | ||||
7118 | // Cap to the global maximum type alignment unless the alignment | |||
7119 | // was somehow explicit on the type. | |||
7120 | if (unsigned MaxAlign = getLangOpts().MaxTypeAlign) { | |||
7121 | if (Alignment.getQuantity() > MaxAlign && | |||
7122 | !getContext().isAlignmentRequired(T)) | |||
7123 | Alignment = CharUnits::fromQuantity(MaxAlign); | |||
7124 | } | |||
7125 | return Alignment; | |||
7126 | } | |||
7127 | ||||
7128 | bool CodeGenModule::stopAutoInit() { | |||
7129 | unsigned StopAfter = getContext().getLangOpts().TrivialAutoVarInitStopAfter; | |||
7130 | if (StopAfter) { | |||
7131 | // This number is positive only when -ftrivial-auto-var-init-stop-after=* is | |||
7132 | // used | |||
7133 | if (NumAutoVarInit >= StopAfter) { | |||
7134 | return true; | |||
7135 | } | |||
7136 | if (!NumAutoVarInit) { | |||
7137 | unsigned DiagID = getDiags().getCustomDiagID( | |||
7138 | DiagnosticsEngine::Warning, | |||
7139 | "-ftrivial-auto-var-init-stop-after=%0 has been enabled to limit the " | |||
7140 | "number of times ftrivial-auto-var-init=%1 gets applied."); | |||
7141 | getDiags().Report(DiagID) | |||
7142 | << StopAfter | |||
7143 | << (getContext().getLangOpts().getTrivialAutoVarInit() == | |||
7144 | LangOptions::TrivialAutoVarInitKind::Zero | |||
7145 | ? "zero" | |||
7146 | : "pattern"); | |||
7147 | } | |||
7148 | ++NumAutoVarInit; | |||
7149 | } | |||
7150 | return false; | |||
7151 | } | |||
7152 | ||||
7153 | void CodeGenModule::printPostfixForExternalizedDecl(llvm::raw_ostream &OS, | |||
7154 | const Decl *D) const { | |||
7155 | // ptxas does not allow '.' in symbol names. On the other hand, HIP prefers | |||
7156 | // postfix beginning with '.' since the symbol name can be demangled. | |||
7157 | if (LangOpts.HIP) | |||
7158 | OS << (isa<VarDecl>(D) ? ".static." : ".intern."); | |||
7159 | else | |||
7160 | OS << (isa<VarDecl>(D) ? "__static__" : "__intern__"); | |||
7161 | ||||
7162 | // If the CUID is not specified we try to generate a unique postfix. | |||
7163 | if (getLangOpts().CUID.empty()) { | |||
7164 | SourceManager &SM = getContext().getSourceManager(); | |||
7165 | PresumedLoc PLoc = SM.getPresumedLoc(D->getLocation()); | |||
7166 | assert(PLoc.isValid() && "Source location is expected to be valid.")(static_cast <bool> (PLoc.isValid() && "Source location is expected to be valid." ) ? void (0) : __assert_fail ("PLoc.isValid() && \"Source location is expected to be valid.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7166, __extension__ __PRETTY_FUNCTION__ )); | |||
7167 | ||||
7168 | // Get the hash of the user defined macros. | |||
7169 | llvm::MD5 Hash; | |||
7170 | llvm::MD5::MD5Result Result; | |||
7171 | for (const auto &Arg : PreprocessorOpts.Macros) | |||
7172 | Hash.update(Arg.first); | |||
7173 | Hash.final(Result); | |||
7174 | ||||
7175 | // Get the UniqueID for the file containing the decl. | |||
7176 | llvm::sys::fs::UniqueID ID; | |||
7177 | if (auto EC = llvm::sys::fs::getUniqueID(PLoc.getFilename(), ID)) { | |||
7178 | PLoc = SM.getPresumedLoc(D->getLocation(), /*UseLineDirectives=*/false); | |||
7179 | assert(PLoc.isValid() && "Source location is expected to be valid.")(static_cast <bool> (PLoc.isValid() && "Source location is expected to be valid." ) ? void (0) : __assert_fail ("PLoc.isValid() && \"Source location is expected to be valid.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7179, __extension__ __PRETTY_FUNCTION__ )); | |||
7180 | if (auto EC = llvm::sys::fs::getUniqueID(PLoc.getFilename(), ID)) | |||
7181 | SM.getDiagnostics().Report(diag::err_cannot_open_file) | |||
7182 | << PLoc.getFilename() << EC.message(); | |||
7183 | } | |||
7184 | OS << llvm::format("%x", ID.getFile()) << llvm::format("%x", ID.getDevice()) | |||
7185 | << "_" << llvm::utohexstr(Result.low(), /*LowerCase=*/true, /*Width=*/8); | |||
7186 | } else { | |||
7187 | OS << getContext().getCUIDHash(); | |||
7188 | } | |||
7189 | } | |||
7190 | ||||
7191 | void CodeGenModule::moveLazyEmissionStates(CodeGenModule *NewBuilder) { | |||
7192 | assert(DeferredDeclsToEmit.empty() &&(static_cast <bool> (DeferredDeclsToEmit.empty() && "Should have emitted all decls deferred to emit.") ? void (0 ) : __assert_fail ("DeferredDeclsToEmit.empty() && \"Should have emitted all decls deferred to emit.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7193, __extension__ __PRETTY_FUNCTION__ )) | |||
7193 | "Should have emitted all decls deferred to emit.")(static_cast <bool> (DeferredDeclsToEmit.empty() && "Should have emitted all decls deferred to emit.") ? void (0 ) : __assert_fail ("DeferredDeclsToEmit.empty() && \"Should have emitted all decls deferred to emit.\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7193, __extension__ __PRETTY_FUNCTION__ )); | |||
7194 | assert(NewBuilder->DeferredDecls.empty() &&(static_cast <bool> (NewBuilder->DeferredDecls.empty () && "Newly created module should not have deferred decls" ) ? void (0) : __assert_fail ("NewBuilder->DeferredDecls.empty() && \"Newly created module should not have deferred decls\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7195, __extension__ __PRETTY_FUNCTION__ )) | |||
7195 | "Newly created module should not have deferred decls")(static_cast <bool> (NewBuilder->DeferredDecls.empty () && "Newly created module should not have deferred decls" ) ? void (0) : __assert_fail ("NewBuilder->DeferredDecls.empty() && \"Newly created module should not have deferred decls\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7195, __extension__ __PRETTY_FUNCTION__ )); | |||
7196 | NewBuilder->DeferredDecls = std::move(DeferredDecls); | |||
7197 | ||||
7198 | assert(NewBuilder->DeferredVTables.empty() &&(static_cast <bool> (NewBuilder->DeferredVTables.empty () && "Newly created module should not have deferred vtables" ) ? void (0) : __assert_fail ("NewBuilder->DeferredVTables.empty() && \"Newly created module should not have deferred vtables\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7199, __extension__ __PRETTY_FUNCTION__ )) | |||
7199 | "Newly created module should not have deferred vtables")(static_cast <bool> (NewBuilder->DeferredVTables.empty () && "Newly created module should not have deferred vtables" ) ? void (0) : __assert_fail ("NewBuilder->DeferredVTables.empty() && \"Newly created module should not have deferred vtables\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7199, __extension__ __PRETTY_FUNCTION__ )); | |||
7200 | NewBuilder->DeferredVTables = std::move(DeferredVTables); | |||
7201 | ||||
7202 | assert(NewBuilder->MangledDeclNames.empty() &&(static_cast <bool> (NewBuilder->MangledDeclNames.empty () && "Newly created module should not have mangled decl names" ) ? void (0) : __assert_fail ("NewBuilder->MangledDeclNames.empty() && \"Newly created module should not have mangled decl names\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7203, __extension__ __PRETTY_FUNCTION__ )) | |||
7203 | "Newly created module should not have mangled decl names")(static_cast <bool> (NewBuilder->MangledDeclNames.empty () && "Newly created module should not have mangled decl names" ) ? void (0) : __assert_fail ("NewBuilder->MangledDeclNames.empty() && \"Newly created module should not have mangled decl names\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7203, __extension__ __PRETTY_FUNCTION__ )); | |||
7204 | assert(NewBuilder->Manglings.empty() &&(static_cast <bool> (NewBuilder->Manglings.empty() && "Newly created module should not have manglings") ? void (0) : __assert_fail ("NewBuilder->Manglings.empty() && \"Newly created module should not have manglings\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7205, __extension__ __PRETTY_FUNCTION__ )) | |||
7205 | "Newly created module should not have manglings")(static_cast <bool> (NewBuilder->Manglings.empty() && "Newly created module should not have manglings") ? void (0) : __assert_fail ("NewBuilder->Manglings.empty() && \"Newly created module should not have manglings\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7205, __extension__ __PRETTY_FUNCTION__ )); | |||
7206 | NewBuilder->Manglings = std::move(Manglings); | |||
7207 | ||||
7208 | assert(WeakRefReferences.empty() && "Not all WeakRefRefs have been applied")(static_cast <bool> (WeakRefReferences.empty() && "Not all WeakRefRefs have been applied") ? void (0) : __assert_fail ("WeakRefReferences.empty() && \"Not all WeakRefRefs have been applied\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7208, __extension__ __PRETTY_FUNCTION__ )); | |||
7209 | NewBuilder->WeakRefReferences = std::move(WeakRefReferences); | |||
7210 | ||||
7211 | NewBuilder->TBAA = std::move(TBAA); | |||
7212 | ||||
7213 | assert(NewBuilder->EmittedDeferredDecls.empty() &&(static_cast <bool> (NewBuilder->EmittedDeferredDecls .empty() && "Still have (unmerged) EmittedDeferredDecls deferred decls" ) ? void (0) : __assert_fail ("NewBuilder->EmittedDeferredDecls.empty() && \"Still have (unmerged) EmittedDeferredDecls deferred decls\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7214, __extension__ __PRETTY_FUNCTION__ )) | |||
7214 | "Still have (unmerged) EmittedDeferredDecls deferred decls")(static_cast <bool> (NewBuilder->EmittedDeferredDecls .empty() && "Still have (unmerged) EmittedDeferredDecls deferred decls" ) ? void (0) : __assert_fail ("NewBuilder->EmittedDeferredDecls.empty() && \"Still have (unmerged) EmittedDeferredDecls deferred decls\"" , "clang/lib/CodeGen/CodeGenModule.cpp", 7214, __extension__ __PRETTY_FUNCTION__ )); | |||
7215 | ||||
7216 | NewBuilder->EmittedDeferredDecls = std::move(EmittedDeferredDecls); | |||
7217 | ||||
7218 | NewBuilder->ABI->MangleCtx = std::move(ABI->MangleCtx); | |||
7219 | } |