/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/CodeGenModule.h
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1 | | //===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===// |
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 is the internal per-translation-unit state used for llvm translation. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H |
14 | | #define LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H |
15 | | |
16 | | #include "CGVTables.h" |
17 | | #include "CodeGenTypeCache.h" |
18 | | #include "CodeGenTypes.h" |
19 | | #include "SanitizerMetadata.h" |
20 | | #include "clang/AST/DeclCXX.h" |
21 | | #include "clang/AST/DeclObjC.h" |
22 | | #include "clang/AST/DeclOpenMP.h" |
23 | | #include "clang/AST/GlobalDecl.h" |
24 | | #include "clang/AST/Mangle.h" |
25 | | #include "clang/Basic/ABI.h" |
26 | | #include "clang/Basic/LangOptions.h" |
27 | | #include "clang/Basic/Module.h" |
28 | | #include "clang/Basic/NoSanitizeList.h" |
29 | | #include "clang/Basic/TargetInfo.h" |
30 | | #include "clang/Basic/XRayLists.h" |
31 | | #include "clang/Lex/PreprocessorOptions.h" |
32 | | #include "llvm/ADT/DenseMap.h" |
33 | | #include "llvm/ADT/SetVector.h" |
34 | | #include "llvm/ADT/SmallPtrSet.h" |
35 | | #include "llvm/ADT/StringMap.h" |
36 | | #include "llvm/IR/Module.h" |
37 | | #include "llvm/IR/ValueHandle.h" |
38 | | #include "llvm/Transforms/Utils/SanitizerStats.h" |
39 | | |
40 | | namespace llvm { |
41 | | class Module; |
42 | | class Constant; |
43 | | class ConstantInt; |
44 | | class Function; |
45 | | class GlobalValue; |
46 | | class DataLayout; |
47 | | class FunctionType; |
48 | | class LLVMContext; |
49 | | class IndexedInstrProfReader; |
50 | | } |
51 | | |
52 | | namespace clang { |
53 | | class ASTContext; |
54 | | class AtomicType; |
55 | | class FunctionDecl; |
56 | | class IdentifierInfo; |
57 | | class ObjCImplementationDecl; |
58 | | class ObjCEncodeExpr; |
59 | | class BlockExpr; |
60 | | class CharUnits; |
61 | | class Decl; |
62 | | class Expr; |
63 | | class Stmt; |
64 | | class StringLiteral; |
65 | | class NamedDecl; |
66 | | class ValueDecl; |
67 | | class VarDecl; |
68 | | class LangOptions; |
69 | | class CodeGenOptions; |
70 | | class HeaderSearchOptions; |
71 | | class DiagnosticsEngine; |
72 | | class AnnotateAttr; |
73 | | class CXXDestructorDecl; |
74 | | class Module; |
75 | | class CoverageSourceInfo; |
76 | | class InitSegAttr; |
77 | | |
78 | | namespace CodeGen { |
79 | | |
80 | | class CodeGenFunction; |
81 | | class CodeGenTBAA; |
82 | | class CGCXXABI; |
83 | | class CGDebugInfo; |
84 | | class CGObjCRuntime; |
85 | | class CGOpenCLRuntime; |
86 | | class CGOpenMPRuntime; |
87 | | class CGCUDARuntime; |
88 | | class CGHLSLRuntime; |
89 | | class CoverageMappingModuleGen; |
90 | | class TargetCodeGenInfo; |
91 | | |
92 | | enum ForDefinition_t : bool { |
93 | | NotForDefinition = false, |
94 | | ForDefinition = true |
95 | | }; |
96 | | |
97 | | struct OrderGlobalInitsOrStermFinalizers { |
98 | | unsigned int priority; |
99 | | unsigned int lex_order; |
100 | | OrderGlobalInitsOrStermFinalizers(unsigned int p, unsigned int l) |
101 | 937 | : priority(p), lex_order(l) {} |
102 | | |
103 | 0 | bool operator==(const OrderGlobalInitsOrStermFinalizers &RHS) const { |
104 | 0 | return priority == RHS.priority && lex_order == RHS.lex_order; |
105 | 0 | } |
106 | | |
107 | 663 | bool operator<(const OrderGlobalInitsOrStermFinalizers &RHS) const { |
108 | 663 | return std::tie(priority, lex_order) < |
109 | 663 | std::tie(RHS.priority, RHS.lex_order); |
110 | 663 | } |
111 | | }; |
112 | | |
113 | | struct ObjCEntrypoints { |
114 | 16.4k | ObjCEntrypoints() { memset(this, 0, sizeof(*this)); } |
115 | | |
116 | | /// void objc_alloc(id); |
117 | | llvm::FunctionCallee objc_alloc; |
118 | | |
119 | | /// void objc_allocWithZone(id); |
120 | | llvm::FunctionCallee objc_allocWithZone; |
121 | | |
122 | | /// void objc_alloc_init(id); |
123 | | llvm::FunctionCallee objc_alloc_init; |
124 | | |
125 | | /// void objc_autoreleasePoolPop(void*); |
126 | | llvm::FunctionCallee objc_autoreleasePoolPop; |
127 | | |
128 | | /// void objc_autoreleasePoolPop(void*); |
129 | | /// Note this method is used when we are using exception handling |
130 | | llvm::FunctionCallee objc_autoreleasePoolPopInvoke; |
131 | | |
132 | | /// void *objc_autoreleasePoolPush(void); |
133 | | llvm::Function *objc_autoreleasePoolPush; |
134 | | |
135 | | /// id objc_autorelease(id); |
136 | | llvm::Function *objc_autorelease; |
137 | | |
138 | | /// id objc_autorelease(id); |
139 | | /// Note this is the runtime method not the intrinsic. |
140 | | llvm::FunctionCallee objc_autoreleaseRuntimeFunction; |
141 | | |
142 | | /// id objc_autoreleaseReturnValue(id); |
143 | | llvm::Function *objc_autoreleaseReturnValue; |
144 | | |
145 | | /// void objc_copyWeak(id *dest, id *src); |
146 | | llvm::Function *objc_copyWeak; |
147 | | |
148 | | /// void objc_destroyWeak(id*); |
149 | | llvm::Function *objc_destroyWeak; |
150 | | |
151 | | /// id objc_initWeak(id*, id); |
152 | | llvm::Function *objc_initWeak; |
153 | | |
154 | | /// id objc_loadWeak(id*); |
155 | | llvm::Function *objc_loadWeak; |
156 | | |
157 | | /// id objc_loadWeakRetained(id*); |
158 | | llvm::Function *objc_loadWeakRetained; |
159 | | |
160 | | /// void objc_moveWeak(id *dest, id *src); |
161 | | llvm::Function *objc_moveWeak; |
162 | | |
163 | | /// id objc_retain(id); |
164 | | llvm::Function *objc_retain; |
165 | | |
166 | | /// id objc_retain(id); |
167 | | /// Note this is the runtime method not the intrinsic. |
168 | | llvm::FunctionCallee objc_retainRuntimeFunction; |
169 | | |
170 | | /// id objc_retainAutorelease(id); |
171 | | llvm::Function *objc_retainAutorelease; |
172 | | |
173 | | /// id objc_retainAutoreleaseReturnValue(id); |
174 | | llvm::Function *objc_retainAutoreleaseReturnValue; |
175 | | |
176 | | /// id objc_retainAutoreleasedReturnValue(id); |
177 | | llvm::Function *objc_retainAutoreleasedReturnValue; |
178 | | |
179 | | /// id objc_retainBlock(id); |
180 | | llvm::Function *objc_retainBlock; |
181 | | |
182 | | /// void objc_release(id); |
183 | | llvm::Function *objc_release; |
184 | | |
185 | | /// void objc_release(id); |
186 | | /// Note this is the runtime method not the intrinsic. |
187 | | llvm::FunctionCallee objc_releaseRuntimeFunction; |
188 | | |
189 | | /// void objc_storeStrong(id*, id); |
190 | | llvm::Function *objc_storeStrong; |
191 | | |
192 | | /// id objc_storeWeak(id*, id); |
193 | | llvm::Function *objc_storeWeak; |
194 | | |
195 | | /// id objc_unsafeClaimAutoreleasedReturnValue(id); |
196 | | llvm::Function *objc_unsafeClaimAutoreleasedReturnValue; |
197 | | |
198 | | /// A void(void) inline asm to use to mark that the return value of |
199 | | /// a call will be immediately retain. |
200 | | llvm::InlineAsm *retainAutoreleasedReturnValueMarker; |
201 | | |
202 | | /// void clang.arc.use(...); |
203 | | llvm::Function *clang_arc_use; |
204 | | |
205 | | /// void clang.arc.noop.use(...); |
206 | | llvm::Function *clang_arc_noop_use; |
207 | | }; |
208 | | |
209 | | /// This class records statistics on instrumentation based profiling. |
210 | | class InstrProfStats { |
211 | | uint32_t VisitedInMainFile; |
212 | | uint32_t MissingInMainFile; |
213 | | uint32_t Visited; |
214 | | uint32_t Missing; |
215 | | uint32_t Mismatched; |
216 | | |
217 | | public: |
218 | | InstrProfStats() |
219 | | : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0), |
220 | 36.4k | Mismatched(0) {} |
221 | | /// Record that we've visited a function and whether or not that function was |
222 | | /// in the main source file. |
223 | 187 | void addVisited(bool MainFile) { |
224 | 187 | if (MainFile) |
225 | 184 | ++VisitedInMainFile; |
226 | 187 | ++Visited; |
227 | 187 | } |
228 | | /// Record that a function we've visited has no profile data. |
229 | 6 | void addMissing(bool MainFile) { |
230 | 6 | if (MainFile) |
231 | 6 | ++MissingInMainFile; |
232 | 6 | ++Missing; |
233 | 6 | } |
234 | | /// Record that a function we've visited has mismatched profile data. |
235 | 9 | void addMismatched(bool MainFile) { ++Mismatched; } |
236 | | /// Whether or not the stats we've gathered indicate any potential problems. |
237 | 53 | bool hasDiagnostics() { return Missing || Mismatched43 ; } |
238 | | /// Report potential problems we've found to \c Diags. |
239 | | void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile); |
240 | | }; |
241 | | |
242 | | /// A pair of helper functions for a __block variable. |
243 | | class BlockByrefHelpers : public llvm::FoldingSetNode { |
244 | | // MSVC requires this type to be complete in order to process this |
245 | | // header. |
246 | | public: |
247 | | llvm::Constant *CopyHelper; |
248 | | llvm::Constant *DisposeHelper; |
249 | | |
250 | | /// The alignment of the field. This is important because |
251 | | /// different offsets to the field within the byref struct need to |
252 | | /// have different helper functions. |
253 | | CharUnits Alignment; |
254 | | |
255 | | BlockByrefHelpers(CharUnits alignment) |
256 | 87 | : CopyHelper(nullptr), DisposeHelper(nullptr), Alignment(alignment) {} |
257 | 67 | BlockByrefHelpers(const BlockByrefHelpers &) = default; |
258 | | virtual ~BlockByrefHelpers(); |
259 | | |
260 | 107 | void Profile(llvm::FoldingSetNodeID &id) const { |
261 | 107 | id.AddInteger(Alignment.getQuantity()); |
262 | 107 | profileImpl(id); |
263 | 107 | } |
264 | | virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0; |
265 | | |
266 | 54 | virtual bool needsCopy() const { return true; } |
267 | | virtual void emitCopy(CodeGenFunction &CGF, Address dest, Address src) = 0; |
268 | | |
269 | 57 | virtual bool needsDispose() const { return true; } |
270 | | virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0; |
271 | | }; |
272 | | |
273 | | /// This class organizes the cross-function state that is used while generating |
274 | | /// LLVM code. |
275 | | class CodeGenModule : public CodeGenTypeCache { |
276 | | CodeGenModule(const CodeGenModule &) = delete; |
277 | | void operator=(const CodeGenModule &) = delete; |
278 | | |
279 | | public: |
280 | | struct Structor { |
281 | 0 | Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {} |
282 | | Structor(int Priority, llvm::Constant *Initializer, |
283 | | llvm::Constant *AssociatedData) |
284 | | : Priority(Priority), Initializer(Initializer), |
285 | 4.30k | AssociatedData(AssociatedData) {} |
286 | | int Priority; |
287 | | llvm::Constant *Initializer; |
288 | | llvm::Constant *AssociatedData; |
289 | | }; |
290 | | |
291 | | typedef std::vector<Structor> CtorList; |
292 | | |
293 | | private: |
294 | | ASTContext &Context; |
295 | | const LangOptions &LangOpts; |
296 | | const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info. |
297 | | const PreprocessorOptions &PreprocessorOpts; // Only used for debug info. |
298 | | const CodeGenOptions &CodeGenOpts; |
299 | | unsigned NumAutoVarInit = 0; |
300 | | llvm::Module &TheModule; |
301 | | DiagnosticsEngine &Diags; |
302 | | const TargetInfo &Target; |
303 | | std::unique_ptr<CGCXXABI> ABI; |
304 | | llvm::LLVMContext &VMContext; |
305 | | std::string ModuleNameHash; |
306 | | |
307 | | std::unique_ptr<CodeGenTBAA> TBAA; |
308 | | |
309 | | mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo; |
310 | | |
311 | | // This should not be moved earlier, since its initialization depends on some |
312 | | // of the previous reference members being already initialized and also checks |
313 | | // if TheTargetCodeGenInfo is NULL |
314 | | CodeGenTypes Types; |
315 | | |
316 | | /// Holds information about C++ vtables. |
317 | | CodeGenVTables VTables; |
318 | | |
319 | | std::unique_ptr<CGObjCRuntime> ObjCRuntime; |
320 | | std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime; |
321 | | std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime; |
322 | | std::unique_ptr<CGCUDARuntime> CUDARuntime; |
323 | | std::unique_ptr<CGHLSLRuntime> HLSLRuntime; |
324 | | std::unique_ptr<CGDebugInfo> DebugInfo; |
325 | | std::unique_ptr<ObjCEntrypoints> ObjCData; |
326 | | llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr; |
327 | | std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader; |
328 | | InstrProfStats PGOStats; |
329 | | std::unique_ptr<llvm::SanitizerStatReport> SanStats; |
330 | | |
331 | | // A set of references that have only been seen via a weakref so far. This is |
332 | | // used to remove the weak of the reference if we ever see a direct reference |
333 | | // or a definition. |
334 | | llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences; |
335 | | |
336 | | /// This contains all the decls which have definitions but/ which are deferred |
337 | | /// for emission and therefore should only be output if they are actually |
338 | | /// used. If a decl is in this, then it is known to have not been referenced |
339 | | /// yet. |
340 | | llvm::DenseMap<StringRef, GlobalDecl> DeferredDecls; |
341 | | |
342 | | /// This is a list of deferred decls which we have seen that *are* actually |
343 | | /// referenced. These get code generated when the module is done. |
344 | | std::vector<GlobalDecl> DeferredDeclsToEmit; |
345 | 149k | void addDeferredDeclToEmit(GlobalDecl GD) { |
346 | 149k | DeferredDeclsToEmit.emplace_back(GD); |
347 | 149k | addEmittedDeferredDecl(GD); |
348 | 149k | } |
349 | | |
350 | | /// Decls that were DeferredDecls and have now been emitted. |
351 | | llvm::DenseMap<llvm::StringRef, GlobalDecl> EmittedDeferredDecls; |
352 | | |
353 | 149k | void addEmittedDeferredDecl(GlobalDecl GD) { |
354 | 149k | if (!llvm::isa<FunctionDecl>(GD.getDecl())) |
355 | 4.50k | return; |
356 | 145k | llvm::GlobalVariable::LinkageTypes L = getFunctionLinkage(GD); |
357 | 145k | if (llvm::GlobalValue::isLinkOnceLinkage(L) || |
358 | 145k | llvm::GlobalValue::isWeakLinkage(L)26.8k ) { |
359 | 118k | EmittedDeferredDecls[getMangledName(GD)] = GD; |
360 | 118k | } |
361 | 145k | } |
362 | | |
363 | | /// List of alias we have emitted. Used to make sure that what they point to |
364 | | /// is defined once we get to the end of the of the translation unit. |
365 | | std::vector<GlobalDecl> Aliases; |
366 | | |
367 | | /// List of multiversion functions to be emitted. This list is processed in |
368 | | /// conjunction with other deferred symbols and is used to ensure that |
369 | | /// multiversion function resolvers and ifuncs are defined and emitted. |
370 | | std::vector<GlobalDecl> MultiVersionFuncs; |
371 | | |
372 | | typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy; |
373 | | ReplacementsTy Replacements; |
374 | | |
375 | | /// List of global values to be replaced with something else. Used when we |
376 | | /// want to replace a GlobalValue but can't identify it by its mangled name |
377 | | /// anymore (because the name is already taken). |
378 | | llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8> |
379 | | GlobalValReplacements; |
380 | | |
381 | | /// Variables for which we've emitted globals containing their constant |
382 | | /// values along with the corresponding globals, for opportunistic reuse. |
383 | | llvm::DenseMap<const VarDecl*, llvm::GlobalVariable*> InitializerConstants; |
384 | | |
385 | | /// Set of global decls for which we already diagnosed mangled name conflict. |
386 | | /// Required to not issue a warning (on a mangling conflict) multiple times |
387 | | /// for the same decl. |
388 | | llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions; |
389 | | |
390 | | /// A queue of (optional) vtables to consider emitting. |
391 | | std::vector<const CXXRecordDecl*> DeferredVTables; |
392 | | |
393 | | /// A queue of (optional) vtables that may be emitted opportunistically. |
394 | | std::vector<const CXXRecordDecl *> OpportunisticVTables; |
395 | | |
396 | | /// List of global values which are required to be present in the object file; |
397 | | /// bitcast to i8*. This is used for forcing visibility of symbols which may |
398 | | /// otherwise be optimized out. |
399 | | std::vector<llvm::WeakTrackingVH> LLVMUsed; |
400 | | std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed; |
401 | | |
402 | | /// Store the list of global constructors and their respective priorities to |
403 | | /// be emitted when the translation unit is complete. |
404 | | CtorList GlobalCtors; |
405 | | |
406 | | /// Store the list of global destructors and their respective priorities to be |
407 | | /// emitted when the translation unit is complete. |
408 | | CtorList GlobalDtors; |
409 | | |
410 | | /// An ordered map of canonical GlobalDecls to their mangled names. |
411 | | llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames; |
412 | | llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings; |
413 | | |
414 | | /// Global annotations. |
415 | | std::vector<llvm::Constant*> Annotations; |
416 | | |
417 | | /// Map used to get unique annotation strings. |
418 | | llvm::StringMap<llvm::Constant*> AnnotationStrings; |
419 | | |
420 | | /// Used for uniquing of annotation arguments. |
421 | | llvm::DenseMap<unsigned, llvm::Constant *> AnnotationArgs; |
422 | | |
423 | | llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap; |
424 | | |
425 | | llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap; |
426 | | llvm::DenseMap<const UnnamedGlobalConstantDecl *, llvm::GlobalVariable *> |
427 | | UnnamedGlobalConstantDeclMap; |
428 | | llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap; |
429 | | llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap; |
430 | | llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap; |
431 | | |
432 | | llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap; |
433 | | llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap; |
434 | | |
435 | | /// Map used to get unique type descriptor constants for sanitizers. |
436 | | llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap; |
437 | | |
438 | | /// Map used to track internal linkage functions declared within |
439 | | /// extern "C" regions. |
440 | | typedef llvm::MapVector<IdentifierInfo *, |
441 | | llvm::GlobalValue *> StaticExternCMap; |
442 | | StaticExternCMap StaticExternCValues; |
443 | | |
444 | | /// thread_local variables defined or used in this TU. |
445 | | std::vector<const VarDecl *> CXXThreadLocals; |
446 | | |
447 | | /// thread_local variables with initializers that need to run |
448 | | /// before any thread_local variable in this TU is odr-used. |
449 | | std::vector<llvm::Function *> CXXThreadLocalInits; |
450 | | std::vector<const VarDecl *> CXXThreadLocalInitVars; |
451 | | |
452 | | /// Global variables with initializers that need to run before main. |
453 | | std::vector<llvm::Function *> CXXGlobalInits; |
454 | | |
455 | | /// When a C++ decl with an initializer is deferred, null is |
456 | | /// appended to CXXGlobalInits, and the index of that null is placed |
457 | | /// here so that the initializer will be performed in the correct |
458 | | /// order. Once the decl is emitted, the index is replaced with ~0U to ensure |
459 | | /// that we don't re-emit the initializer. |
460 | | llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition; |
461 | | |
462 | | typedef std::pair<OrderGlobalInitsOrStermFinalizers, llvm::Function *> |
463 | | GlobalInitData; |
464 | | |
465 | | struct GlobalInitPriorityCmp { |
466 | | bool operator()(const GlobalInitData &LHS, |
467 | 623 | const GlobalInitData &RHS) const { |
468 | 623 | return LHS.first.priority < RHS.first.priority; |
469 | 623 | } |
470 | | }; |
471 | | |
472 | | /// Global variables with initializers whose order of initialization is set by |
473 | | /// init_priority attribute. |
474 | | SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits; |
475 | | |
476 | | /// Global destructor functions and arguments that need to run on termination. |
477 | | /// When UseSinitAndSterm is set, it instead contains sterm finalizer |
478 | | /// functions, which also run on unloading a shared library. |
479 | | typedef std::tuple<llvm::FunctionType *, llvm::WeakTrackingVH, |
480 | | llvm::Constant *> |
481 | | CXXGlobalDtorsOrStermFinalizer_t; |
482 | | SmallVector<CXXGlobalDtorsOrStermFinalizer_t, 8> |
483 | | CXXGlobalDtorsOrStermFinalizers; |
484 | | |
485 | | typedef std::pair<OrderGlobalInitsOrStermFinalizers, llvm::Function *> |
486 | | StermFinalizerData; |
487 | | |
488 | | struct StermFinalizerPriorityCmp { |
489 | | bool operator()(const StermFinalizerData &LHS, |
490 | 8 | const StermFinalizerData &RHS) const { |
491 | 8 | return LHS.first.priority < RHS.first.priority; |
492 | 8 | } |
493 | | }; |
494 | | |
495 | | /// Global variables with sterm finalizers whose order of initialization is |
496 | | /// set by init_priority attribute. |
497 | | SmallVector<StermFinalizerData, 8> PrioritizedCXXStermFinalizers; |
498 | | |
499 | | /// The complete set of modules that has been imported. |
500 | | llvm::SetVector<clang::Module *> ImportedModules; |
501 | | |
502 | | /// The set of modules for which the module initializers |
503 | | /// have been emitted. |
504 | | llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers; |
505 | | |
506 | | /// A vector of metadata strings for linker options. |
507 | | SmallVector<llvm::MDNode *, 16> LinkerOptionsMetadata; |
508 | | |
509 | | /// A vector of metadata strings for dependent libraries for ELF. |
510 | | SmallVector<llvm::MDNode *, 16> ELFDependentLibraries; |
511 | | |
512 | | /// @name Cache for Objective-C runtime types |
513 | | /// @{ |
514 | | |
515 | | /// Cached reference to the class for constant strings. This value has type |
516 | | /// int * but is actually an Obj-C class pointer. |
517 | | llvm::WeakTrackingVH CFConstantStringClassRef; |
518 | | |
519 | | /// The type used to describe the state of a fast enumeration in |
520 | | /// Objective-C's for..in loop. |
521 | | QualType ObjCFastEnumerationStateType; |
522 | | |
523 | | /// @} |
524 | | |
525 | | /// Lazily create the Objective-C runtime |
526 | | void createObjCRuntime(); |
527 | | |
528 | | void createOpenCLRuntime(); |
529 | | void createOpenMPRuntime(); |
530 | | void createCUDARuntime(); |
531 | | void createHLSLRuntime(); |
532 | | |
533 | | bool isTriviallyRecursive(const FunctionDecl *F); |
534 | | bool shouldEmitFunction(GlobalDecl GD); |
535 | | bool shouldOpportunisticallyEmitVTables(); |
536 | | /// Map used to be sure we don't emit the same CompoundLiteral twice. |
537 | | llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *> |
538 | | EmittedCompoundLiterals; |
539 | | |
540 | | /// Map of the global blocks we've emitted, so that we don't have to re-emit |
541 | | /// them if the constexpr evaluator gets aggressive. |
542 | | llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks; |
543 | | |
544 | | /// @name Cache for Blocks Runtime Globals |
545 | | /// @{ |
546 | | |
547 | | llvm::Constant *NSConcreteGlobalBlock = nullptr; |
548 | | llvm::Constant *NSConcreteStackBlock = nullptr; |
549 | | |
550 | | llvm::FunctionCallee BlockObjectAssign = nullptr; |
551 | | llvm::FunctionCallee BlockObjectDispose = nullptr; |
552 | | |
553 | | llvm::Type *BlockDescriptorType = nullptr; |
554 | | llvm::Type *GenericBlockLiteralType = nullptr; |
555 | | |
556 | | struct { |
557 | | int GlobalUniqueCount; |
558 | | } Block; |
559 | | |
560 | | GlobalDecl initializedGlobalDecl; |
561 | | |
562 | | /// @} |
563 | | |
564 | | /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>) |
565 | | llvm::Function *LifetimeStartFn = nullptr; |
566 | | |
567 | | /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>) |
568 | | llvm::Function *LifetimeEndFn = nullptr; |
569 | | |
570 | | std::unique_ptr<SanitizerMetadata> SanitizerMD; |
571 | | |
572 | | llvm::MapVector<const Decl *, bool> DeferredEmptyCoverageMappingDecls; |
573 | | |
574 | | std::unique_ptr<CoverageMappingModuleGen> CoverageMapping; |
575 | | |
576 | | /// Mapping from canonical types to their metadata identifiers. We need to |
577 | | /// maintain this mapping because identifiers may be formed from distinct |
578 | | /// MDNodes. |
579 | | typedef llvm::DenseMap<QualType, llvm::Metadata *> MetadataTypeMap; |
580 | | MetadataTypeMap MetadataIdMap; |
581 | | MetadataTypeMap VirtualMetadataIdMap; |
582 | | MetadataTypeMap GeneralizedMetadataIdMap; |
583 | | |
584 | | llvm::DenseMap<const llvm::Constant *, llvm::GlobalVariable *> RTTIProxyMap; |
585 | | |
586 | | public: |
587 | | CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts, |
588 | | const PreprocessorOptions &ppopts, |
589 | | const CodeGenOptions &CodeGenOpts, llvm::Module &M, |
590 | | DiagnosticsEngine &Diags, |
591 | | CoverageSourceInfo *CoverageInfo = nullptr); |
592 | | |
593 | | ~CodeGenModule(); |
594 | | |
595 | | void clear(); |
596 | | |
597 | | /// Finalize LLVM code generation. |
598 | | void Release(); |
599 | | |
600 | | /// Return true if we should emit location information for expressions. |
601 | | bool getExpressionLocationsEnabled() const; |
602 | | |
603 | | /// Return a reference to the configured Objective-C runtime. |
604 | 25.5k | CGObjCRuntime &getObjCRuntime() { |
605 | 25.5k | if (!ObjCRuntime) createObjCRuntime()0 ; |
606 | 25.5k | return *ObjCRuntime; |
607 | 25.5k | } |
608 | | |
609 | | /// Return true iff an Objective-C runtime has been configured. |
610 | 0 | bool hasObjCRuntime() { return !!ObjCRuntime; } |
611 | | |
612 | 4.54M | const std::string &getModuleNameHash() const { return ModuleNameHash; } |
613 | | |
614 | | /// Return a reference to the configured OpenCL runtime. |
615 | 1.17k | CGOpenCLRuntime &getOpenCLRuntime() { |
616 | 1.17k | assert(OpenCLRuntime != nullptr); |
617 | 0 | return *OpenCLRuntime; |
618 | 1.17k | } |
619 | | |
620 | | /// Return a reference to the configured OpenMP runtime. |
621 | 920k | CGOpenMPRuntime &getOpenMPRuntime() { |
622 | 920k | assert(OpenMPRuntime != nullptr); |
623 | 0 | return *OpenMPRuntime; |
624 | 920k | } |
625 | | |
626 | | /// Return a reference to the configured CUDA runtime. |
627 | 1.06k | CGCUDARuntime &getCUDARuntime() { |
628 | 1.06k | assert(CUDARuntime != nullptr); |
629 | 0 | return *CUDARuntime; |
630 | 1.06k | } |
631 | | |
632 | | /// Return a reference to the configured HLSL runtime. |
633 | 5 | CGHLSLRuntime &getHLSLRuntime() { |
634 | 5 | assert(HLSLRuntime != nullptr); |
635 | 0 | return *HLSLRuntime; |
636 | 5 | } |
637 | | |
638 | 7.32k | ObjCEntrypoints &getObjCEntrypoints() const { |
639 | 7.32k | assert(ObjCData != nullptr); |
640 | 0 | return *ObjCData; |
641 | 7.32k | } |
642 | | |
643 | | // Version checking functions, used to implement ObjC's @available: |
644 | | // i32 @__isOSVersionAtLeast(i32, i32, i32) |
645 | | llvm::FunctionCallee IsOSVersionAtLeastFn = nullptr; |
646 | | // i32 @__isPlatformVersionAtLeast(i32, i32, i32, i32) |
647 | | llvm::FunctionCallee IsPlatformVersionAtLeastFn = nullptr; |
648 | | |
649 | 202 | InstrProfStats &getPGOStats() { return PGOStats; } |
650 | 298k | llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); } |
651 | | |
652 | 503 | CoverageMappingModuleGen *getCoverageMapping() const { |
653 | 503 | return CoverageMapping.get(); |
654 | 503 | } |
655 | | |
656 | 22 | llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) { |
657 | 22 | return StaticLocalDeclMap[D]; |
658 | 22 | } |
659 | | void setStaticLocalDeclAddress(const VarDecl *D, |
660 | 24.9k | llvm::Constant *C) { |
661 | 24.9k | StaticLocalDeclMap[D] = C; |
662 | 24.9k | } |
663 | | |
664 | | llvm::Constant * |
665 | | getOrCreateStaticVarDecl(const VarDecl &D, |
666 | | llvm::GlobalValue::LinkageTypes Linkage); |
667 | | |
668 | 9.08k | llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) { |
669 | 9.08k | return StaticLocalDeclGuardMap[D]; |
670 | 9.08k | } |
671 | | void setStaticLocalDeclGuardAddress(const VarDecl *D, |
672 | 9.08k | llvm::GlobalVariable *C) { |
673 | 9.08k | StaticLocalDeclGuardMap[D] = C; |
674 | 9.08k | } |
675 | | |
676 | | Address createUnnamedGlobalFrom(const VarDecl &D, llvm::Constant *Constant, |
677 | | CharUnits Align); |
678 | | |
679 | | bool lookupRepresentativeDecl(StringRef MangledName, |
680 | | GlobalDecl &Result) const; |
681 | | |
682 | 7 | llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) { |
683 | 7 | return AtomicSetterHelperFnMap[Ty]; |
684 | 7 | } |
685 | | void setAtomicSetterHelperFnMap(QualType Ty, |
686 | 5 | llvm::Constant *Fn) { |
687 | 5 | AtomicSetterHelperFnMap[Ty] = Fn; |
688 | 5 | } |
689 | | |
690 | 6 | llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) { |
691 | 6 | return AtomicGetterHelperFnMap[Ty]; |
692 | 6 | } |
693 | | void setAtomicGetterHelperFnMap(QualType Ty, |
694 | 4 | llvm::Constant *Fn) { |
695 | 4 | AtomicGetterHelperFnMap[Ty] = Fn; |
696 | 4 | } |
697 | | |
698 | 2.68k | llvm::Constant *getTypeDescriptorFromMap(QualType Ty) { |
699 | 2.68k | return TypeDescriptorMap[Ty]; |
700 | 2.68k | } |
701 | 545 | void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) { |
702 | 545 | TypeDescriptorMap[Ty] = C; |
703 | 545 | } |
704 | | |
705 | 7.33M | CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); } |
706 | | |
707 | 378 | llvm::MDNode *getNoObjCARCExceptionsMetadata() { |
708 | 378 | if (!NoObjCARCExceptionsMetadata) |
709 | 26 | NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None); |
710 | 378 | return NoObjCARCExceptionsMetadata; |
711 | 378 | } |
712 | | |
713 | 84.0M | ASTContext &getContext() const { return Context; } |
714 | 32.2M | const LangOptions &getLangOpts() const { return LangOpts; } |
715 | | const HeaderSearchOptions &getHeaderSearchOpts() |
716 | 3.76k | const { return HeaderSearchOpts; } |
717 | | const PreprocessorOptions &getPreprocessorOpts() |
718 | 31.0k | const { return PreprocessorOpts; } |
719 | 28.2M | const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; } |
720 | 5.40M | llvm::Module &getModule() const { return TheModule; } |
721 | 87.7k | DiagnosticsEngine &getDiags() const { return Diags; } |
722 | 2.33M | const llvm::DataLayout &getDataLayout() const { |
723 | 2.33M | return TheModule.getDataLayout(); |
724 | 2.33M | } |
725 | 6.35M | const TargetInfo &getTarget() const { return Target; } |
726 | 1.63M | const llvm::Triple &getTriple() const { return Target.getTriple(); } |
727 | | bool supportsCOMDAT() const; |
728 | | void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO); |
729 | | |
730 | 5.13M | CGCXXABI &getCXXABI() const { return *ABI; } |
731 | 17.2M | llvm::LLVMContext &getLLVMContext() { return VMContext; } |
732 | | |
733 | 0 | bool shouldUseTBAA() const { return TBAA != nullptr; } |
734 | | |
735 | | const TargetCodeGenInfo &getTargetCodeGenInfo(); |
736 | | |
737 | 9.57M | CodeGenTypes &getTypes() { return Types; } |
738 | | |
739 | 13.9k | CodeGenVTables &getVTables() { return VTables; } |
740 | | |
741 | 49.1k | ItaniumVTableContext &getItaniumVTableContext() { |
742 | 49.1k | return VTables.getItaniumVTableContext(); |
743 | 49.1k | } |
744 | | |
745 | 8.12k | MicrosoftVTableContext &getMicrosoftVTableContext() { |
746 | 8.12k | return VTables.getMicrosoftVTableContext(); |
747 | 8.12k | } |
748 | | |
749 | 0 | CtorList &getGlobalCtors() { return GlobalCtors; } |
750 | 0 | CtorList &getGlobalDtors() { return GlobalDtors; } |
751 | | |
752 | | /// getTBAATypeInfo - Get metadata used to describe accesses to objects of |
753 | | /// the given type. |
754 | | llvm::MDNode *getTBAATypeInfo(QualType QTy); |
755 | | |
756 | | /// getTBAAAccessInfo - Get TBAA information that describes an access to |
757 | | /// an object of the given type. |
758 | | TBAAAccessInfo getTBAAAccessInfo(QualType AccessType); |
759 | | |
760 | | /// getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an |
761 | | /// access to a virtual table pointer. |
762 | | TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType); |
763 | | |
764 | | llvm::MDNode *getTBAAStructInfo(QualType QTy); |
765 | | |
766 | | /// getTBAABaseTypeInfo - Get metadata that describes the given base access |
767 | | /// type. Return null if the type is not suitable for use in TBAA access tags. |
768 | | llvm::MDNode *getTBAABaseTypeInfo(QualType QTy); |
769 | | |
770 | | /// getTBAAAccessTagInfo - Get TBAA tag for a given memory access. |
771 | | llvm::MDNode *getTBAAAccessTagInfo(TBAAAccessInfo Info); |
772 | | |
773 | | /// mergeTBAAInfoForCast - Get merged TBAA information for the purposes of |
774 | | /// type casts. |
775 | | TBAAAccessInfo mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo, |
776 | | TBAAAccessInfo TargetInfo); |
777 | | |
778 | | /// mergeTBAAInfoForConditionalOperator - Get merged TBAA information for the |
779 | | /// purposes of conditional operator. |
780 | | TBAAAccessInfo mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA, |
781 | | TBAAAccessInfo InfoB); |
782 | | |
783 | | /// mergeTBAAInfoForMemoryTransfer - Get merged TBAA information for the |
784 | | /// purposes of memory transfer calls. |
785 | | TBAAAccessInfo mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo, |
786 | | TBAAAccessInfo SrcInfo); |
787 | | |
788 | | /// getTBAAInfoForSubobject - Get TBAA information for an access with a given |
789 | | /// base lvalue. |
790 | 34.7k | TBAAAccessInfo getTBAAInfoForSubobject(LValue Base, QualType AccessType) { |
791 | 34.7k | if (Base.getTBAAInfo().isMayAlias()) |
792 | 303 | return TBAAAccessInfo::getMayAliasInfo(); |
793 | 34.4k | return getTBAAAccessInfo(AccessType); |
794 | 34.7k | } |
795 | | |
796 | | bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor); |
797 | | |
798 | | bool isPaddedAtomicType(QualType type); |
799 | | bool isPaddedAtomicType(const AtomicType *type); |
800 | | |
801 | | /// DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag. |
802 | | void DecorateInstructionWithTBAA(llvm::Instruction *Inst, |
803 | | TBAAAccessInfo TBAAInfo); |
804 | | |
805 | | /// Adds !invariant.barrier !tag to instruction |
806 | | void DecorateInstructionWithInvariantGroup(llvm::Instruction *I, |
807 | | const CXXRecordDecl *RD); |
808 | | |
809 | | /// Emit the given number of characters as a value of type size_t. |
810 | | llvm::ConstantInt *getSize(CharUnits numChars); |
811 | | |
812 | | /// Set the visibility for the given LLVM GlobalValue. |
813 | | void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const; |
814 | | |
815 | | void setDSOLocal(llvm::GlobalValue *GV) const; |
816 | | |
817 | 1.21M | bool shouldMapVisibilityToDLLExport(const NamedDecl *D) const { |
818 | 1.21M | return getLangOpts().hasDefaultVisibilityExportMapping() && D345 && |
819 | 1.21M | (D->getLinkageAndVisibility().getVisibility() == |
820 | 345 | DefaultVisibility) && |
821 | 1.21M | (264 getLangOpts().isAllDefaultVisibilityExportMapping()264 || |
822 | 264 | (131 getLangOpts().isExplicitDefaultVisibilityExportMapping()131 && |
823 | 131 | D->getLinkageAndVisibility().isVisibilityExplicit())); |
824 | 1.21M | } |
825 | | void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const; |
826 | | void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const; |
827 | | /// Set visibility, dllimport/dllexport and dso_local. |
828 | | /// This must be called after dllimport/dllexport is set. |
829 | | void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const; |
830 | | void setGVProperties(llvm::GlobalValue *GV, const NamedDecl *D) const; |
831 | | |
832 | | void setGVPropertiesAux(llvm::GlobalValue *GV, const NamedDecl *D) const; |
833 | | |
834 | | /// Set the TLS mode for the given LLVM GlobalValue for the thread-local |
835 | | /// variable declaration D. |
836 | | void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const; |
837 | | |
838 | | /// Get LLVM TLS mode from CodeGenOptions. |
839 | | llvm::GlobalVariable::ThreadLocalMode GetDefaultLLVMTLSModel() const; |
840 | | |
841 | 415k | static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) { |
842 | 415k | switch (V) { |
843 | 253k | case DefaultVisibility: return llvm::GlobalValue::DefaultVisibility; |
844 | 161k | case HiddenVisibility: return llvm::GlobalValue::HiddenVisibility; |
845 | 527 | case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility; |
846 | 415k | } |
847 | 0 | llvm_unreachable("unknown visibility!"); |
848 | 0 | } |
849 | | |
850 | | llvm::Constant *GetAddrOfGlobal(GlobalDecl GD, |
851 | | ForDefinition_t IsForDefinition |
852 | | = NotForDefinition); |
853 | | |
854 | | /// Will return a global variable of the given type. If a variable with a |
855 | | /// different type already exists then a new variable with the right type |
856 | | /// will be created and all uses of the old variable will be replaced with a |
857 | | /// bitcast to the new variable. |
858 | | llvm::GlobalVariable * |
859 | | CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty, |
860 | | llvm::GlobalValue::LinkageTypes Linkage, |
861 | | unsigned Alignment); |
862 | | |
863 | | llvm::Function *CreateGlobalInitOrCleanUpFunction( |
864 | | llvm::FunctionType *ty, const Twine &name, const CGFunctionInfo &FI, |
865 | | SourceLocation Loc = SourceLocation(), bool TLS = false, |
866 | | llvm::GlobalVariable::LinkageTypes Linkage = |
867 | | llvm::GlobalVariable::InternalLinkage); |
868 | | |
869 | | /// Return the AST address space of the underlying global variable for D, as |
870 | | /// determined by its declaration. Normally this is the same as the address |
871 | | /// space of D's type, but in CUDA, address spaces are associated with |
872 | | /// declarations, not types. If D is nullptr, return the default address |
873 | | /// space for global variable. |
874 | | /// |
875 | | /// For languages without explicit address spaces, if D has default address |
876 | | /// space, target-specific global or constant address space may be returned. |
877 | | LangAS GetGlobalVarAddressSpace(const VarDecl *D); |
878 | | |
879 | | /// Return the AST address space of constant literal, which is used to emit |
880 | | /// the constant literal as global variable in LLVM IR. |
881 | | /// Note: This is not necessarily the address space of the constant literal |
882 | | /// in AST. For address space agnostic language, e.g. C++, constant literal |
883 | | /// in AST is always in default address space. |
884 | | LangAS GetGlobalConstantAddressSpace() const; |
885 | | |
886 | | /// Return the llvm::Constant for the address of the given global variable. |
887 | | /// If Ty is non-null and if the global doesn't exist, then it will be created |
888 | | /// with the specified type instead of whatever the normal requested type |
889 | | /// would be. If IsForDefinition is true, it is guaranteed that an actual |
890 | | /// global with type Ty will be returned, not conversion of a variable with |
891 | | /// the same mangled name but some other type. |
892 | | llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D, |
893 | | llvm::Type *Ty = nullptr, |
894 | | ForDefinition_t IsForDefinition |
895 | | = NotForDefinition); |
896 | | |
897 | | /// Return the address of the given function. If Ty is non-null, then this |
898 | | /// function will use the specified type if it has to create it. |
899 | | llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr, |
900 | | bool ForVTable = false, |
901 | | bool DontDefer = false, |
902 | | ForDefinition_t IsForDefinition |
903 | | = NotForDefinition); |
904 | | |
905 | | // Return the function body address of the given function. |
906 | | llvm::Constant *GetFunctionStart(const ValueDecl *Decl); |
907 | | |
908 | | /// Get the address of the RTTI descriptor for the given type. |
909 | | llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false); |
910 | | |
911 | | /// Get the address of a GUID. |
912 | | ConstantAddress GetAddrOfMSGuidDecl(const MSGuidDecl *GD); |
913 | | |
914 | | /// Get the address of a UnnamedGlobalConstant |
915 | | ConstantAddress |
916 | | GetAddrOfUnnamedGlobalConstantDecl(const UnnamedGlobalConstantDecl *GCD); |
917 | | |
918 | | /// Get the address of a template parameter object. |
919 | | ConstantAddress |
920 | | GetAddrOfTemplateParamObject(const TemplateParamObjectDecl *TPO); |
921 | | |
922 | | /// Get the address of the thunk for the given global decl. |
923 | | llvm::Constant *GetAddrOfThunk(StringRef Name, llvm::Type *FnTy, |
924 | | GlobalDecl GD); |
925 | | |
926 | | /// Get a reference to the target of VD. |
927 | | ConstantAddress GetWeakRefReference(const ValueDecl *VD); |
928 | | |
929 | | /// Returns the assumed alignment of an opaque pointer to the given class. |
930 | | CharUnits getClassPointerAlignment(const CXXRecordDecl *CD); |
931 | | |
932 | | /// Returns the minimum object size for an object of the given class type |
933 | | /// (or a class derived from it). |
934 | | CharUnits getMinimumClassObjectSize(const CXXRecordDecl *CD); |
935 | | |
936 | | /// Returns the minimum object size for an object of the given type. |
937 | 445k | CharUnits getMinimumObjectSize(QualType Ty) { |
938 | 445k | if (CXXRecordDecl *RD = Ty->getAsCXXRecordDecl()) |
939 | 366k | return getMinimumClassObjectSize(RD); |
940 | 78.9k | return getContext().getTypeSizeInChars(Ty); |
941 | 445k | } |
942 | | |
943 | | /// Returns the assumed alignment of a virtual base of a class. |
944 | | CharUnits getVBaseAlignment(CharUnits DerivedAlign, |
945 | | const CXXRecordDecl *Derived, |
946 | | const CXXRecordDecl *VBase); |
947 | | |
948 | | /// Given a class pointer with an actual known alignment, and the |
949 | | /// expected alignment of an object at a dynamic offset w.r.t that |
950 | | /// pointer, return the alignment to assume at the offset. |
951 | | CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign, |
952 | | const CXXRecordDecl *Class, |
953 | | CharUnits ExpectedTargetAlign); |
954 | | |
955 | | CharUnits |
956 | | computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass, |
957 | | CastExpr::path_const_iterator Start, |
958 | | CastExpr::path_const_iterator End); |
959 | | |
960 | | /// Returns the offset from a derived class to a class. Returns null if the |
961 | | /// offset is 0. |
962 | | llvm::Constant * |
963 | | GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl, |
964 | | CastExpr::path_const_iterator PathBegin, |
965 | | CastExpr::path_const_iterator PathEnd); |
966 | | |
967 | | llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache; |
968 | | |
969 | | /// Fetches the global unique block count. |
970 | 175 | int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; } |
971 | | |
972 | | /// Fetches the type of a generic block descriptor. |
973 | | llvm::Type *getBlockDescriptorType(); |
974 | | |
975 | | /// The type of a generic block literal. |
976 | | llvm::Type *getGenericBlockLiteralType(); |
977 | | |
978 | | /// Gets the address of a block which requires no captures. |
979 | | llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name); |
980 | | |
981 | | /// Returns the address of a block which requires no caputres, or null if |
982 | | /// we've yet to emit the block for BE. |
983 | 1.30k | llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) { |
984 | 1.30k | return EmittedGlobalBlocks.lookup(BE); |
985 | 1.30k | } |
986 | | |
987 | | /// Notes that BE's global block is available via Addr. Asserts that BE |
988 | | /// isn't already emitted. |
989 | | void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr); |
990 | | |
991 | | /// Return a pointer to a constant CFString object for the given string. |
992 | | ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal); |
993 | | |
994 | | /// Return a pointer to a constant NSString object for the given string. Or a |
995 | | /// user defined String object as defined via |
996 | | /// -fconstant-string-class=class_name option. |
997 | | ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal); |
998 | | |
999 | | /// Return a constant array for the given string. |
1000 | | llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E); |
1001 | | |
1002 | | /// Return a pointer to a constant array for the given string literal. |
1003 | | ConstantAddress |
1004 | | GetAddrOfConstantStringFromLiteral(const StringLiteral *S, |
1005 | | StringRef Name = ".str"); |
1006 | | |
1007 | | /// Return a pointer to a constant array for the given ObjCEncodeExpr node. |
1008 | | ConstantAddress |
1009 | | GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *); |
1010 | | |
1011 | | /// Returns a pointer to a character array containing the literal and a |
1012 | | /// terminating '\0' character. The result has pointer to array type. |
1013 | | /// |
1014 | | /// \param GlobalName If provided, the name to use for the global (if one is |
1015 | | /// created). |
1016 | | ConstantAddress |
1017 | | GetAddrOfConstantCString(const std::string &Str, |
1018 | | const char *GlobalName = nullptr); |
1019 | | |
1020 | | /// Returns a pointer to a constant global variable for the given file-scope |
1021 | | /// compound literal expression. |
1022 | | ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E); |
1023 | | |
1024 | | /// If it's been emitted already, returns the GlobalVariable corresponding to |
1025 | | /// a compound literal. Otherwise, returns null. |
1026 | | llvm::GlobalVariable * |
1027 | | getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E); |
1028 | | |
1029 | | /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already |
1030 | | /// emitted. |
1031 | | void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE, |
1032 | | llvm::GlobalVariable *GV); |
1033 | | |
1034 | | /// Returns a pointer to a global variable representing a temporary |
1035 | | /// with static or thread storage duration. |
1036 | | ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E, |
1037 | | const Expr *Inner); |
1038 | | |
1039 | | /// Retrieve the record type that describes the state of an |
1040 | | /// Objective-C fast enumeration loop (for..in). |
1041 | | QualType getObjCFastEnumerationStateType(); |
1042 | | |
1043 | | // Produce code for this constructor/destructor. This method doesn't try |
1044 | | // to apply any ABI rules about which other constructors/destructors |
1045 | | // are needed or if they are alias to each other. |
1046 | | llvm::Function *codegenCXXStructor(GlobalDecl GD); |
1047 | | |
1048 | | /// Return the address of the constructor/destructor of the given type. |
1049 | | llvm::Constant * |
1050 | | getAddrOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr, |
1051 | | llvm::FunctionType *FnType = nullptr, |
1052 | | bool DontDefer = false, |
1053 | 198k | ForDefinition_t IsForDefinition = NotForDefinition) { |
1054 | 198k | return cast<llvm::Constant>(getAddrAndTypeOfCXXStructor(GD, FnInfo, FnType, |
1055 | 198k | DontDefer, |
1056 | 198k | IsForDefinition) |
1057 | 198k | .getCallee()); |
1058 | 198k | } |
1059 | | |
1060 | | llvm::FunctionCallee getAddrAndTypeOfCXXStructor( |
1061 | | GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr, |
1062 | | llvm::FunctionType *FnType = nullptr, bool DontDefer = false, |
1063 | | ForDefinition_t IsForDefinition = NotForDefinition); |
1064 | | |
1065 | | /// Given a builtin id for a function like "__builtin_fabsf", return a |
1066 | | /// Function* for "fabsf". |
1067 | | llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD, |
1068 | | unsigned BuiltinID); |
1069 | | |
1070 | | llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None); |
1071 | | |
1072 | | /// Emit code for a single top level declaration. |
1073 | | void EmitTopLevelDecl(Decl *D); |
1074 | | |
1075 | | /// Stored a deferred empty coverage mapping for an unused |
1076 | | /// and thus uninstrumented top level declaration. |
1077 | | void AddDeferredUnusedCoverageMapping(Decl *D); |
1078 | | |
1079 | | /// Remove the deferred empty coverage mapping as this |
1080 | | /// declaration is actually instrumented. |
1081 | | void ClearUnusedCoverageMapping(const Decl *D); |
1082 | | |
1083 | | /// Emit all the deferred coverage mappings |
1084 | | /// for the uninstrumented functions. |
1085 | | void EmitDeferredUnusedCoverageMappings(); |
1086 | | |
1087 | | /// Emit an alias for "main" if it has no arguments (needed for wasm). |
1088 | | void EmitMainVoidAlias(); |
1089 | | |
1090 | | /// Tell the consumer that this variable has been instantiated. |
1091 | | void HandleCXXStaticMemberVarInstantiation(VarDecl *VD); |
1092 | | |
1093 | | /// If the declaration has internal linkage but is inside an |
1094 | | /// extern "C" linkage specification, prepare to emit an alias for it |
1095 | | /// to the expected name. |
1096 | | template<typename SomeDecl> |
1097 | | void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV); |
1098 | | |
1099 | | /// Add a global to a list to be added to the llvm.used metadata. |
1100 | | void addUsedGlobal(llvm::GlobalValue *GV); |
1101 | | |
1102 | | /// Add a global to a list to be added to the llvm.compiler.used metadata. |
1103 | | void addCompilerUsedGlobal(llvm::GlobalValue *GV); |
1104 | | |
1105 | | /// Add a global to a list to be added to the llvm.compiler.used metadata. |
1106 | | void addUsedOrCompilerUsedGlobal(llvm::GlobalValue *GV); |
1107 | | |
1108 | | /// Add a destructor and object to add to the C++ global destructor function. |
1109 | 6 | void AddCXXDtorEntry(llvm::FunctionCallee DtorFn, llvm::Constant *Object) { |
1110 | 6 | CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(), |
1111 | 6 | DtorFn.getCallee(), Object); |
1112 | 6 | } |
1113 | | |
1114 | | /// Add an sterm finalizer to the C++ global cleanup function. |
1115 | 22 | void AddCXXStermFinalizerEntry(llvm::FunctionCallee DtorFn) { |
1116 | 22 | CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(), |
1117 | 22 | DtorFn.getCallee(), nullptr); |
1118 | 22 | } |
1119 | | |
1120 | | /// Add an sterm finalizer to its own llvm.global_dtors entry. |
1121 | | void AddCXXStermFinalizerToGlobalDtor(llvm::Function *StermFinalizer, |
1122 | 6 | int Priority) { |
1123 | 6 | AddGlobalDtor(StermFinalizer, Priority); |
1124 | 6 | } |
1125 | | |
1126 | | void AddCXXPrioritizedStermFinalizerEntry(llvm::Function *StermFinalizer, |
1127 | 8 | int Priority) { |
1128 | 8 | OrderGlobalInitsOrStermFinalizers Key(Priority, |
1129 | 8 | PrioritizedCXXStermFinalizers.size()); |
1130 | 8 | PrioritizedCXXStermFinalizers.push_back( |
1131 | 8 | std::make_pair(Key, StermFinalizer)); |
1132 | 8 | } |
1133 | | |
1134 | | /// Create or return a runtime function declaration with the specified type |
1135 | | /// and name. If \p AssumeConvergent is true, the call will have the |
1136 | | /// convergent attribute added. |
1137 | | llvm::FunctionCallee |
1138 | | CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name, |
1139 | | llvm::AttributeList ExtraAttrs = llvm::AttributeList(), |
1140 | | bool Local = false, bool AssumeConvergent = false); |
1141 | | |
1142 | | /// Create a new runtime global variable with the specified type and name. |
1143 | | llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty, |
1144 | | StringRef Name); |
1145 | | |
1146 | | ///@name Custom Blocks Runtime Interfaces |
1147 | | ///@{ |
1148 | | |
1149 | | llvm::Constant *getNSConcreteGlobalBlock(); |
1150 | | llvm::Constant *getNSConcreteStackBlock(); |
1151 | | llvm::FunctionCallee getBlockObjectAssign(); |
1152 | | llvm::FunctionCallee getBlockObjectDispose(); |
1153 | | |
1154 | | ///@} |
1155 | | |
1156 | | llvm::Function *getLLVMLifetimeStartFn(); |
1157 | | llvm::Function *getLLVMLifetimeEndFn(); |
1158 | | |
1159 | | // Make sure that this type is translated. |
1160 | | void UpdateCompletedType(const TagDecl *TD); |
1161 | | |
1162 | | llvm::Constant *getMemberPointerConstant(const UnaryOperator *e); |
1163 | | |
1164 | | /// Emit type info if type of an expression is a variably modified |
1165 | | /// type. Also emit proper debug info for cast types. |
1166 | | void EmitExplicitCastExprType(const ExplicitCastExpr *E, |
1167 | | CodeGenFunction *CGF = nullptr); |
1168 | | |
1169 | | /// Return the result of value-initializing the given type, i.e. a null |
1170 | | /// expression of the given type. This is usually, but not always, an LLVM |
1171 | | /// null constant. |
1172 | | llvm::Constant *EmitNullConstant(QualType T); |
1173 | | |
1174 | | /// Return a null constant appropriate for zero-initializing a base class with |
1175 | | /// the given type. This is usually, but not always, an LLVM null constant. |
1176 | | llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record); |
1177 | | |
1178 | | /// Emit a general error that something can't be done. |
1179 | | void Error(SourceLocation loc, StringRef error); |
1180 | | |
1181 | | /// Print out an error that codegen doesn't support the specified stmt yet. |
1182 | | void ErrorUnsupported(const Stmt *S, const char *Type); |
1183 | | |
1184 | | /// Print out an error that codegen doesn't support the specified decl yet. |
1185 | | void ErrorUnsupported(const Decl *D, const char *Type); |
1186 | | |
1187 | | /// Set the attributes on the LLVM function for the given decl and function |
1188 | | /// info. This applies attributes necessary for handling the ABI as well as |
1189 | | /// user specified attributes like section. |
1190 | | void SetInternalFunctionAttributes(GlobalDecl GD, llvm::Function *F, |
1191 | | const CGFunctionInfo &FI); |
1192 | | |
1193 | | /// Set the LLVM function attributes (sext, zext, etc). |
1194 | | void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info, |
1195 | | llvm::Function *F, bool IsThunk); |
1196 | | |
1197 | | /// Set the LLVM function attributes which only apply to a function |
1198 | | /// definition. |
1199 | | void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F); |
1200 | | |
1201 | | /// Set the LLVM function attributes that represent floating point |
1202 | | /// environment. |
1203 | | void setLLVMFunctionFEnvAttributes(const FunctionDecl *D, llvm::Function *F); |
1204 | | |
1205 | | /// Return true iff the given type uses 'sret' when used as a return type. |
1206 | | bool ReturnTypeUsesSRet(const CGFunctionInfo &FI); |
1207 | | |
1208 | | /// Return true iff the given type uses an argument slot when 'sret' is used |
1209 | | /// as a return type. |
1210 | | bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI); |
1211 | | |
1212 | | /// Return true iff the given type uses 'fpret' when used as a return type. |
1213 | | bool ReturnTypeUsesFPRet(QualType ResultType); |
1214 | | |
1215 | | /// Return true iff the given type uses 'fp2ret' when used as a return type. |
1216 | | bool ReturnTypeUsesFP2Ret(QualType ResultType); |
1217 | | |
1218 | | /// Get the LLVM attributes and calling convention to use for a particular |
1219 | | /// function type. |
1220 | | /// |
1221 | | /// \param Name - The function name. |
1222 | | /// \param Info - The function type information. |
1223 | | /// \param CalleeInfo - The callee information these attributes are being |
1224 | | /// constructed for. If valid, the attributes applied to this decl may |
1225 | | /// contribute to the function attributes and calling convention. |
1226 | | /// \param Attrs [out] - On return, the attribute list to use. |
1227 | | /// \param CallingConv [out] - On return, the LLVM calling convention to use. |
1228 | | void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info, |
1229 | | CGCalleeInfo CalleeInfo, |
1230 | | llvm::AttributeList &Attrs, unsigned &CallingConv, |
1231 | | bool AttrOnCallSite, bool IsThunk); |
1232 | | |
1233 | | /// Adds attributes to F according to our CodeGenOptions and LangOptions, as |
1234 | | /// though we had emitted it ourselves. We remove any attributes on F that |
1235 | | /// conflict with the attributes we add here. |
1236 | | /// |
1237 | | /// This is useful for adding attrs to bitcode modules that you want to link |
1238 | | /// with but don't control, such as CUDA's libdevice. When linking with such |
1239 | | /// a bitcode library, you might want to set e.g. its functions' |
1240 | | /// "unsafe-fp-math" attribute to match the attr of the functions you're |
1241 | | /// codegen'ing. Otherwise, LLVM will interpret the bitcode module's lack of |
1242 | | /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM |
1243 | | /// will propagate unsafe-fp-math=false up to every transitive caller of a |
1244 | | /// function in the bitcode library! |
1245 | | /// |
1246 | | /// With the exception of fast-math attrs, this will only make the attributes |
1247 | | /// on the function more conservative. But it's unsafe to call this on a |
1248 | | /// function which relies on particular fast-math attributes for correctness. |
1249 | | /// It's up to you to ensure that this is safe. |
1250 | | void addDefaultFunctionDefinitionAttributes(llvm::Function &F); |
1251 | | |
1252 | | /// Like the overload taking a `Function &`, but intended specifically |
1253 | | /// for frontends that want to build on Clang's target-configuration logic. |
1254 | | void addDefaultFunctionDefinitionAttributes(llvm::AttrBuilder &attrs); |
1255 | | |
1256 | | StringRef getMangledName(GlobalDecl GD); |
1257 | | StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD); |
1258 | | const GlobalDecl getMangledNameDecl(StringRef); |
1259 | | |
1260 | | void EmitTentativeDefinition(const VarDecl *D); |
1261 | | |
1262 | | void EmitExternalDeclaration(const VarDecl *D); |
1263 | | |
1264 | | void EmitVTable(CXXRecordDecl *Class); |
1265 | | |
1266 | | void RefreshTypeCacheForClass(const CXXRecordDecl *Class); |
1267 | | |
1268 | | /// Appends Opts to the "llvm.linker.options" metadata value. |
1269 | | void AppendLinkerOptions(StringRef Opts); |
1270 | | |
1271 | | /// Appends a detect mismatch command to the linker options. |
1272 | | void AddDetectMismatch(StringRef Name, StringRef Value); |
1273 | | |
1274 | | /// Appends a dependent lib to the appropriate metadata value. |
1275 | | void AddDependentLib(StringRef Lib); |
1276 | | |
1277 | | |
1278 | | llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD); |
1279 | | |
1280 | 270k | void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) { |
1281 | 270k | F->setLinkage(getFunctionLinkage(GD)); |
1282 | 270k | } |
1283 | | |
1284 | | /// Return the appropriate linkage for the vtable, VTT, and type information |
1285 | | /// of the given class. |
1286 | | llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD); |
1287 | | |
1288 | | /// Return the store size, in character units, of the given LLVM type. |
1289 | | CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const; |
1290 | | |
1291 | | /// Returns LLVM linkage for a declarator. |
1292 | | llvm::GlobalValue::LinkageTypes |
1293 | | getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage, |
1294 | | bool IsConstantVariable); |
1295 | | |
1296 | | /// Returns LLVM linkage for a declarator. |
1297 | | llvm::GlobalValue::LinkageTypes |
1298 | | getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant); |
1299 | | |
1300 | | /// Emit all the global annotations. |
1301 | | void EmitGlobalAnnotations(); |
1302 | | |
1303 | | /// Emit an annotation string. |
1304 | | llvm::Constant *EmitAnnotationString(StringRef Str); |
1305 | | |
1306 | | /// Emit the annotation's translation unit. |
1307 | | llvm::Constant *EmitAnnotationUnit(SourceLocation Loc); |
1308 | | |
1309 | | /// Emit the annotation line number. |
1310 | | llvm::Constant *EmitAnnotationLineNo(SourceLocation L); |
1311 | | |
1312 | | /// Emit additional args of the annotation. |
1313 | | llvm::Constant *EmitAnnotationArgs(const AnnotateAttr *Attr); |
1314 | | |
1315 | | /// Generate the llvm::ConstantStruct which contains the annotation |
1316 | | /// information for a given GlobalValue. The annotation struct is |
1317 | | /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the |
1318 | | /// GlobalValue being annotated. The second field is the constant string |
1319 | | /// created from the AnnotateAttr's annotation. The third field is a constant |
1320 | | /// string containing the name of the translation unit. The fourth field is |
1321 | | /// the line number in the file of the annotated value declaration. |
1322 | | llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV, |
1323 | | const AnnotateAttr *AA, |
1324 | | SourceLocation L); |
1325 | | |
1326 | | /// Add global annotations that are set on D, for the global GV. Those |
1327 | | /// annotations are emitted during finalization of the LLVM code. |
1328 | | void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV); |
1329 | | |
1330 | | bool isInNoSanitizeList(SanitizerMask Kind, llvm::Function *Fn, |
1331 | | SourceLocation Loc) const; |
1332 | | |
1333 | | bool isInNoSanitizeList(SanitizerMask Kind, llvm::GlobalVariable *GV, |
1334 | | SourceLocation Loc, QualType Ty, |
1335 | | StringRef Category = StringRef()) const; |
1336 | | |
1337 | | /// Imbue XRay attributes to a function, applying the always/never attribute |
1338 | | /// lists in the process. Returns true if we did imbue attributes this way, |
1339 | | /// false otherwise. |
1340 | | bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, |
1341 | | StringRef Category = StringRef()) const; |
1342 | | |
1343 | | /// \returns true if \p Fn at \p Loc should be excluded from profile |
1344 | | /// instrumentation by the SCL passed by \p -fprofile-list. |
1345 | | bool isFunctionBlockedByProfileList(llvm::Function *Fn, |
1346 | | SourceLocation Loc) const; |
1347 | | |
1348 | | /// \returns true if \p Fn at \p Loc should be excluded from profile |
1349 | | /// instrumentation. |
1350 | | bool isFunctionBlockedFromProfileInstr(llvm::Function *Fn, |
1351 | | SourceLocation Loc) const; |
1352 | | |
1353 | 32.1k | SanitizerMetadata *getSanitizerMetadata() { |
1354 | 32.1k | return SanitizerMD.get(); |
1355 | 32.1k | } |
1356 | | |
1357 | 2.96k | void addDeferredVTable(const CXXRecordDecl *RD) { |
1358 | 2.96k | DeferredVTables.push_back(RD); |
1359 | 2.96k | } |
1360 | | |
1361 | | /// Emit code for a single global function or var decl. Forward declarations |
1362 | | /// are emitted lazily. |
1363 | | void EmitGlobal(GlobalDecl D); |
1364 | | |
1365 | | bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D); |
1366 | | |
1367 | | llvm::GlobalValue *GetGlobalValue(StringRef Ref); |
1368 | | |
1369 | | /// Set attributes which are common to any form of a global definition (alias, |
1370 | | /// Objective-C method, function, global variable). |
1371 | | /// |
1372 | | /// NOTE: This should only be called for definitions. |
1373 | | void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV); |
1374 | | |
1375 | | void addReplacement(StringRef Name, llvm::Constant *C); |
1376 | | |
1377 | | void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C); |
1378 | | |
1379 | | /// Emit a code for threadprivate directive. |
1380 | | /// \param D Threadprivate declaration. |
1381 | | void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D); |
1382 | | |
1383 | | /// Emit a code for declare reduction construct. |
1384 | | void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D, |
1385 | | CodeGenFunction *CGF = nullptr); |
1386 | | |
1387 | | /// Emit a code for declare mapper construct. |
1388 | | void EmitOMPDeclareMapper(const OMPDeclareMapperDecl *D, |
1389 | | CodeGenFunction *CGF = nullptr); |
1390 | | |
1391 | | /// Emit a code for requires directive. |
1392 | | /// \param D Requires declaration |
1393 | | void EmitOMPRequiresDecl(const OMPRequiresDecl *D); |
1394 | | |
1395 | | /// Emit a code for the allocate directive. |
1396 | | /// \param D The allocate declaration |
1397 | | void EmitOMPAllocateDecl(const OMPAllocateDecl *D); |
1398 | | |
1399 | | /// Return the alignment specified in an allocate directive, if present. |
1400 | | llvm::Optional<CharUnits> getOMPAllocateAlignment(const VarDecl *VD); |
1401 | | |
1402 | | /// Returns whether the given record has hidden LTO visibility and therefore |
1403 | | /// may participate in (single-module) CFI and whole-program vtable |
1404 | | /// optimization. |
1405 | | bool HasHiddenLTOVisibility(const CXXRecordDecl *RD); |
1406 | | |
1407 | | /// Returns whether the given record has public LTO visibility (regardless of |
1408 | | /// -lto-whole-program-visibility) and therefore may not participate in |
1409 | | /// (single-module) CFI and whole-program vtable optimization. |
1410 | | bool AlwaysHasLTOVisibilityPublic(const CXXRecordDecl *RD); |
1411 | | |
1412 | | /// Returns the vcall visibility of the given type. This is the scope in which |
1413 | | /// a virtual function call could be made which ends up being dispatched to a |
1414 | | /// member function of this class. This scope can be wider than the visibility |
1415 | | /// of the class itself when the class has a more-visible dynamic base class. |
1416 | | /// The client should pass in an empty Visited set, which is used to prevent |
1417 | | /// redundant recursive processing. |
1418 | | llvm::GlobalObject::VCallVisibility |
1419 | | GetVCallVisibilityLevel(const CXXRecordDecl *RD, |
1420 | | llvm::DenseSet<const CXXRecordDecl *> &Visited); |
1421 | | |
1422 | | /// Emit type metadata for the given vtable using the given layout. |
1423 | | void EmitVTableTypeMetadata(const CXXRecordDecl *RD, |
1424 | | llvm::GlobalVariable *VTable, |
1425 | | const VTableLayout &VTLayout); |
1426 | | |
1427 | | /// Generate a cross-DSO type identifier for MD. |
1428 | | llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD); |
1429 | | |
1430 | | /// Create a metadata identifier for the given type. This may either be an |
1431 | | /// MDString (for external identifiers) or a distinct unnamed MDNode (for |
1432 | | /// internal identifiers). |
1433 | | llvm::Metadata *CreateMetadataIdentifierForType(QualType T); |
1434 | | |
1435 | | /// Create a metadata identifier that is intended to be used to check virtual |
1436 | | /// calls via a member function pointer. |
1437 | | llvm::Metadata *CreateMetadataIdentifierForVirtualMemPtrType(QualType T); |
1438 | | |
1439 | | /// Create a metadata identifier for the generalization of the given type. |
1440 | | /// This may either be an MDString (for external identifiers) or a distinct |
1441 | | /// unnamed MDNode (for internal identifiers). |
1442 | | llvm::Metadata *CreateMetadataIdentifierGeneralized(QualType T); |
1443 | | |
1444 | | /// Create and attach type metadata to the given function. |
1445 | | void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD, |
1446 | | llvm::Function *F); |
1447 | | |
1448 | | /// Whether this function's return type has no side effects, and thus may |
1449 | | /// be trivially discarded if it is unused. |
1450 | | bool MayDropFunctionReturn(const ASTContext &Context, QualType ReturnType); |
1451 | | |
1452 | | /// Returns whether this module needs the "all-vtables" type identifier. |
1453 | | bool NeedAllVtablesTypeId() const; |
1454 | | |
1455 | | /// Create and attach type metadata for the given vtable. |
1456 | | void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset, |
1457 | | const CXXRecordDecl *RD); |
1458 | | |
1459 | | /// Return a vector of most-base classes for RD. This is used to implement |
1460 | | /// control flow integrity checks for member function pointers. |
1461 | | /// |
1462 | | /// A most-base class of a class C is defined as a recursive base class of C, |
1463 | | /// including C itself, that does not have any bases. |
1464 | | std::vector<const CXXRecordDecl *> |
1465 | | getMostBaseClasses(const CXXRecordDecl *RD); |
1466 | | |
1467 | | llvm::GlobalVariable * |
1468 | | GetOrCreateRTTIProxyGlobalVariable(llvm::Constant *Addr); |
1469 | | |
1470 | | /// Get the declaration of std::terminate for the platform. |
1471 | | llvm::FunctionCallee getTerminateFn(); |
1472 | | |
1473 | | llvm::SanitizerStatReport &getSanStats(); |
1474 | | |
1475 | | llvm::Value * |
1476 | | createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF); |
1477 | | |
1478 | | /// OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument |
1479 | | /// information in the program executable. The argument information stored |
1480 | | /// includes the argument name, its type, the address and access qualifiers |
1481 | | /// used. This helper can be used to generate metadata for source code kernel |
1482 | | /// function as well as generated implicitly kernels. If a kernel is generated |
1483 | | /// implicitly null value has to be passed to the last two parameters, |
1484 | | /// otherwise all parameters must have valid non-null values. |
1485 | | /// \param FN is a pointer to IR function being generated. |
1486 | | /// \param FD is a pointer to function declaration if any. |
1487 | | /// \param CGF is a pointer to CodeGenFunction that generates this function. |
1488 | | void GenKernelArgMetadata(llvm::Function *FN, |
1489 | | const FunctionDecl *FD = nullptr, |
1490 | | CodeGenFunction *CGF = nullptr); |
1491 | | |
1492 | | /// Get target specific null pointer. |
1493 | | /// \param T is the LLVM type of the null pointer. |
1494 | | /// \param QT is the clang QualType of the null pointer. |
1495 | | llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT); |
1496 | | |
1497 | | CharUnits getNaturalTypeAlignment(QualType T, |
1498 | | LValueBaseInfo *BaseInfo = nullptr, |
1499 | | TBAAAccessInfo *TBAAInfo = nullptr, |
1500 | | bool forPointeeType = false); |
1501 | | CharUnits getNaturalPointeeTypeAlignment(QualType T, |
1502 | | LValueBaseInfo *BaseInfo = nullptr, |
1503 | | TBAAAccessInfo *TBAAInfo = nullptr); |
1504 | | bool stopAutoInit(); |
1505 | | |
1506 | | /// Print the postfix for externalized static variable or kernels for single |
1507 | | /// source offloading languages CUDA and HIP. The unique postfix is created |
1508 | | /// using either the CUID argument, or the file's UniqueID and active macros. |
1509 | | /// The fallback method without a CUID requires that the offloading toolchain |
1510 | | /// does not define separate macros via the -cc1 options. |
1511 | | void printPostfixForExternalizedDecl(llvm::raw_ostream &OS, |
1512 | | const Decl *D) const; |
1513 | | |
1514 | | /// Move some lazily-emitted states to the NewBuilder. This is especially |
1515 | | /// essential for the incremental parsing environment like Clang Interpreter, |
1516 | | /// because we'll lose all important information after each repl. |
1517 | 90 | void moveLazyEmissionStates(CodeGenModule *NewBuilder) { |
1518 | 90 | assert(DeferredDeclsToEmit.empty() && |
1519 | 90 | "Should have emitted all decls deferred to emit."); |
1520 | 0 | assert(NewBuilder->DeferredDecls.empty() && |
1521 | 90 | "Newly created module should not have deferred decls"); |
1522 | 0 | NewBuilder->DeferredDecls = std::move(DeferredDecls); |
1523 | | |
1524 | 90 | assert(NewBuilder->DeferredVTables.empty() && |
1525 | 90 | "Newly created module should not have deferred vtables"); |
1526 | 0 | NewBuilder->DeferredVTables = std::move(DeferredVTables); |
1527 | | |
1528 | 90 | assert(NewBuilder->MangledDeclNames.empty() && |
1529 | 90 | "Newly created module should not have mangled decl names"); |
1530 | 0 | assert(NewBuilder->Manglings.empty() && |
1531 | 90 | "Newly created module should not have manglings"); |
1532 | 0 | NewBuilder->Manglings = std::move(Manglings); |
1533 | | |
1534 | 90 | assert(WeakRefReferences.empty() && |
1535 | 90 | "Not all WeakRefRefs have been applied"); |
1536 | 0 | NewBuilder->WeakRefReferences = std::move(WeakRefReferences); |
1537 | | |
1538 | 90 | NewBuilder->TBAA = std::move(TBAA); |
1539 | | |
1540 | 90 | assert(NewBuilder->EmittedDeferredDecls.empty() && |
1541 | 90 | "Still have (unmerged) EmittedDeferredDecls deferred decls"); |
1542 | | |
1543 | 0 | NewBuilder->EmittedDeferredDecls = std::move(EmittedDeferredDecls); |
1544 | 90 | } |
1545 | | |
1546 | | private: |
1547 | | llvm::Constant *GetOrCreateLLVMFunction( |
1548 | | StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable, |
1549 | | bool DontDefer = false, bool IsThunk = false, |
1550 | | llvm::AttributeList ExtraAttrs = llvm::AttributeList(), |
1551 | | ForDefinition_t IsForDefinition = NotForDefinition); |
1552 | | |
1553 | | // References to multiversion functions are resolved through an implicitly |
1554 | | // defined resolver function. This function is responsible for creating |
1555 | | // the resolver symbol for the provided declaration. The value returned |
1556 | | // will be for an ifunc (llvm::GlobalIFunc) if the current target supports |
1557 | | // that feature and for a regular function (llvm::GlobalValue) otherwise. |
1558 | | llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD); |
1559 | | |
1560 | | // In scenarios where a function is not known to be a multiversion function |
1561 | | // until a later declaration, it is sometimes necessary to change the |
1562 | | // previously created mangled name to align with requirements of whatever |
1563 | | // multiversion function kind the function is now known to be. This function |
1564 | | // is responsible for performing such mangled name updates. |
1565 | | void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD, |
1566 | | StringRef &CurName); |
1567 | | |
1568 | | llvm::Constant * |
1569 | | GetOrCreateLLVMGlobal(StringRef MangledName, llvm::Type *Ty, LangAS AddrSpace, |
1570 | | const VarDecl *D, |
1571 | | ForDefinition_t IsForDefinition = NotForDefinition); |
1572 | | |
1573 | | bool GetCPUAndFeaturesAttributes(GlobalDecl GD, |
1574 | | llvm::AttrBuilder &AttrBuilder); |
1575 | | void setNonAliasAttributes(GlobalDecl GD, llvm::GlobalObject *GO); |
1576 | | |
1577 | | /// Set function attributes for a function declaration. |
1578 | | void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F, |
1579 | | bool IsIncompleteFunction, bool IsThunk); |
1580 | | |
1581 | | void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr); |
1582 | | |
1583 | | void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV); |
1584 | | void EmitMultiVersionFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV); |
1585 | | |
1586 | | void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false); |
1587 | | void EmitExternalVarDeclaration(const VarDecl *D); |
1588 | | void EmitAliasDefinition(GlobalDecl GD); |
1589 | | void emitIFuncDefinition(GlobalDecl GD); |
1590 | | void emitCPUDispatchDefinition(GlobalDecl GD); |
1591 | | void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D); |
1592 | | void EmitObjCIvarInitializations(ObjCImplementationDecl *D); |
1593 | | |
1594 | | // C++ related functions. |
1595 | | |
1596 | | void EmitDeclContext(const DeclContext *DC); |
1597 | | void EmitLinkageSpec(const LinkageSpecDecl *D); |
1598 | | |
1599 | | /// Emit the function that initializes C++ thread_local variables. |
1600 | | void EmitCXXThreadLocalInitFunc(); |
1601 | | |
1602 | | /// Emit the function that initializes C++ globals. |
1603 | | void EmitCXXGlobalInitFunc(); |
1604 | | |
1605 | | /// Emit the function that performs cleanup associated with C++ globals. |
1606 | | void EmitCXXGlobalCleanUpFunc(); |
1607 | | |
1608 | | /// Emit the function that initializes the specified global (if PerformInit is |
1609 | | /// true) and registers its destructor. |
1610 | | void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D, |
1611 | | llvm::GlobalVariable *Addr, |
1612 | | bool PerformInit); |
1613 | | |
1614 | | void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr, |
1615 | | llvm::Function *InitFunc, InitSegAttr *ISA); |
1616 | | |
1617 | | // FIXME: Hardcoding priority here is gross. |
1618 | | void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535, |
1619 | | llvm::Constant *AssociatedData = nullptr); |
1620 | | void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535, |
1621 | | bool IsDtorAttrFunc = false); |
1622 | | |
1623 | | /// EmitCtorList - Generates a global array of functions and priorities using |
1624 | | /// the given list and name. This array will have appending linkage and is |
1625 | | /// suitable for use as a LLVM constructor or destructor array. Clears Fns. |
1626 | | void EmitCtorList(CtorList &Fns, const char *GlobalName); |
1627 | | |
1628 | | /// Emit any needed decls for which code generation was deferred. |
1629 | | void EmitDeferred(); |
1630 | | |
1631 | | /// Try to emit external vtables as available_externally if they have emitted |
1632 | | /// all inlined virtual functions. It runs after EmitDeferred() and therefore |
1633 | | /// is not allowed to create new references to things that need to be emitted |
1634 | | /// lazily. |
1635 | | void EmitVTablesOpportunistically(); |
1636 | | |
1637 | | /// Call replaceAllUsesWith on all pairs in Replacements. |
1638 | | void applyReplacements(); |
1639 | | |
1640 | | /// Call replaceAllUsesWith on all pairs in GlobalValReplacements. |
1641 | | void applyGlobalValReplacements(); |
1642 | | |
1643 | | void checkAliases(); |
1644 | | |
1645 | | std::map<int, llvm::TinyPtrVector<llvm::Function *>> DtorsUsingAtExit; |
1646 | | |
1647 | | /// Register functions annotated with __attribute__((destructor)) using |
1648 | | /// __cxa_atexit, if it is available, or atexit otherwise. |
1649 | | void registerGlobalDtorsWithAtExit(); |
1650 | | |
1651 | | // When using sinit and sterm functions, unregister |
1652 | | // __attribute__((destructor)) annotated functions which were previously |
1653 | | // registered by the atexit subroutine using unatexit. |
1654 | | void unregisterGlobalDtorsWithUnAtExit(); |
1655 | | |
1656 | | /// Emit deferred multiversion function resolvers and associated variants. |
1657 | | void emitMultiVersionFunctions(); |
1658 | | |
1659 | | /// Emit any vtables which we deferred and still have a use for. |
1660 | | void EmitDeferredVTables(); |
1661 | | |
1662 | | /// Emit a dummy function that reference a CoreFoundation symbol when |
1663 | | /// @available is used on Darwin. |
1664 | | void emitAtAvailableLinkGuard(); |
1665 | | |
1666 | | /// Emit the llvm.used and llvm.compiler.used metadata. |
1667 | | void emitLLVMUsed(); |
1668 | | |
1669 | | /// Emit the link options introduced by imported modules. |
1670 | | void EmitModuleLinkOptions(); |
1671 | | |
1672 | | /// Helper function for EmitStaticExternCAliases() to redirect ifuncs that |
1673 | | /// have a resolver name that matches 'Elem' to instead resolve to the name of |
1674 | | /// 'CppFunc'. This redirection is necessary in cases where 'Elem' has a name |
1675 | | /// that will be emitted as an alias of the name bound to 'CppFunc'; ifuncs |
1676 | | /// may not reference aliases. Redirection is only performed if 'Elem' is only |
1677 | | /// used by ifuncs in which case, 'Elem' is destroyed. 'true' is returned if |
1678 | | /// redirection is successful, and 'false' is returned otherwise. |
1679 | | bool CheckAndReplaceExternCIFuncs(llvm::GlobalValue *Elem, |
1680 | | llvm::GlobalValue *CppFunc); |
1681 | | |
1682 | | /// Emit aliases for internal-linkage declarations inside "C" language |
1683 | | /// linkage specifications, giving them the "expected" name where possible. |
1684 | | void EmitStaticExternCAliases(); |
1685 | | |
1686 | | void EmitDeclMetadata(); |
1687 | | |
1688 | | /// Emit the Clang version as llvm.ident metadata. |
1689 | | void EmitVersionIdentMetadata(); |
1690 | | |
1691 | | /// Emit the Clang commandline as llvm.commandline metadata. |
1692 | | void EmitCommandLineMetadata(); |
1693 | | |
1694 | | /// Emit the module flag metadata used to pass options controlling the |
1695 | | /// the backend to LLVM. |
1696 | | void EmitBackendOptionsMetadata(const CodeGenOptions CodeGenOpts); |
1697 | | |
1698 | | /// Emits OpenCL specific Metadata e.g. OpenCL version. |
1699 | | void EmitOpenCLMetadata(); |
1700 | | |
1701 | | /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and |
1702 | | /// .gcda files in a way that persists in .bc files. |
1703 | | void EmitCoverageFile(); |
1704 | | |
1705 | | /// Determine whether the definition must be emitted; if this returns \c |
1706 | | /// false, the definition can be emitted lazily if it's used. |
1707 | | bool MustBeEmitted(const ValueDecl *D); |
1708 | | |
1709 | | /// Determine whether the definition can be emitted eagerly, or should be |
1710 | | /// delayed until the end of the translation unit. This is relevant for |
1711 | | /// definitions whose linkage can change, e.g. implicit function instantions |
1712 | | /// which may later be explicitly instantiated. |
1713 | | bool MayBeEmittedEagerly(const ValueDecl *D); |
1714 | | |
1715 | | /// Check whether we can use a "simpler", more core exceptions personality |
1716 | | /// function. |
1717 | | void SimplifyPersonality(); |
1718 | | |
1719 | | /// Helper function for ConstructAttributeList and |
1720 | | /// addDefaultFunctionDefinitionAttributes. Builds a set of function |
1721 | | /// attributes to add to a function with the given properties. |
1722 | | void getDefaultFunctionAttributes(StringRef Name, bool HasOptnone, |
1723 | | bool AttrOnCallSite, |
1724 | | llvm::AttrBuilder &FuncAttrs); |
1725 | | |
1726 | | llvm::Metadata *CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map, |
1727 | | StringRef Suffix); |
1728 | | }; |
1729 | | |
1730 | | } // end namespace CodeGen |
1731 | | } // end namespace clang |
1732 | | |
1733 | | #endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H |