1 //== AnalysisDeclContext.cpp - Analysis context for Path Sens analysis -*- C++ -*-//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines AnalysisDeclContext, a class that manages the analysis context
11 // data for path sensitive analysis.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "clang/Analysis/AnalysisContext.h"
16 #include "BodyFarm.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/Decl.h"
19 #include "clang/AST/DeclObjC.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/ParentMap.h"
22 #include "clang/AST/StmtVisitor.h"
23 #include "clang/Analysis/Analyses/CFGReachabilityAnalysis.h"
24 #include "clang/Analysis/Analyses/LiveVariables.h"
25 #include "clang/Analysis/Analyses/PseudoConstantAnalysis.h"
26 #include "clang/Analysis/CFG.h"
27 #include "clang/Analysis/CFGStmtMap.h"
28 #include "clang/Analysis/Support/BumpVector.h"
29 #include "llvm/ADT/SmallPtrSet.h"
30 #include "llvm/Support/ErrorHandling.h"
31 #include "llvm/Support/SaveAndRestore.h"
32 #include "llvm/Support/raw_ostream.h"
33
34 using namespace clang;
35
36 typedef llvm::DenseMap<const void *, ManagedAnalysis *> ManagedAnalysisMap;
37
AnalysisDeclContext(AnalysisDeclContextManager * Mgr,const Decl * d,const CFG::BuildOptions & buildOptions)38 AnalysisDeclContext::AnalysisDeclContext(AnalysisDeclContextManager *Mgr,
39 const Decl *d,
40 const CFG::BuildOptions &buildOptions)
41 : Manager(Mgr),
42 D(d),
43 cfgBuildOptions(buildOptions),
44 forcedBlkExprs(nullptr),
45 builtCFG(false),
46 builtCompleteCFG(false),
47 ReferencedBlockVars(nullptr),
48 ManagedAnalyses(nullptr)
49 {
50 cfgBuildOptions.forcedBlkExprs = &forcedBlkExprs;
51 }
52
AnalysisDeclContext(AnalysisDeclContextManager * Mgr,const Decl * d)53 AnalysisDeclContext::AnalysisDeclContext(AnalysisDeclContextManager *Mgr,
54 const Decl *d)
55 : Manager(Mgr),
56 D(d),
57 forcedBlkExprs(nullptr),
58 builtCFG(false),
59 builtCompleteCFG(false),
60 ReferencedBlockVars(nullptr),
61 ManagedAnalyses(nullptr)
62 {
63 cfgBuildOptions.forcedBlkExprs = &forcedBlkExprs;
64 }
65
AnalysisDeclContextManager(bool useUnoptimizedCFG,bool addImplicitDtors,bool addInitializers,bool addTemporaryDtors,bool synthesizeBodies,bool addStaticInitBranch,bool addCXXNewAllocator,CodeInjector * injector)66 AnalysisDeclContextManager::AnalysisDeclContextManager(bool useUnoptimizedCFG,
67 bool addImplicitDtors,
68 bool addInitializers,
69 bool addTemporaryDtors,
70 bool synthesizeBodies,
71 bool addStaticInitBranch,
72 bool addCXXNewAllocator,
73 CodeInjector *injector)
74 : Injector(injector), SynthesizeBodies(synthesizeBodies)
75 {
76 cfgBuildOptions.PruneTriviallyFalseEdges = !useUnoptimizedCFG;
77 cfgBuildOptions.AddImplicitDtors = addImplicitDtors;
78 cfgBuildOptions.AddInitializers = addInitializers;
79 cfgBuildOptions.AddTemporaryDtors = addTemporaryDtors;
80 cfgBuildOptions.AddStaticInitBranches = addStaticInitBranch;
81 cfgBuildOptions.AddCXXNewAllocator = addCXXNewAllocator;
82 }
83
clear()84 void AnalysisDeclContextManager::clear() {
85 llvm::DeleteContainerSeconds(Contexts);
86 }
87
getBodyFarm(ASTContext & C,CodeInjector * injector=nullptr)88 static BodyFarm &getBodyFarm(ASTContext &C, CodeInjector *injector = nullptr) {
89 static BodyFarm *BF = new BodyFarm(C, injector);
90 return *BF;
91 }
92
getBody(bool & IsAutosynthesized) const93 Stmt *AnalysisDeclContext::getBody(bool &IsAutosynthesized) const {
94 IsAutosynthesized = false;
95 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
96 Stmt *Body = FD->getBody();
97 if (Manager && Manager->synthesizeBodies()) {
98 Stmt *SynthesizedBody =
99 getBodyFarm(getASTContext(), Manager->Injector.get()).getBody(FD);
100 if (SynthesizedBody) {
101 Body = SynthesizedBody;
102 IsAutosynthesized = true;
103 }
104 }
105 return Body;
106 }
107 else if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
108 Stmt *Body = MD->getBody();
109 if (Manager && Manager->synthesizeBodies()) {
110 Stmt *SynthesizedBody =
111 getBodyFarm(getASTContext(), Manager->Injector.get()).getBody(MD);
112 if (SynthesizedBody) {
113 Body = SynthesizedBody;
114 IsAutosynthesized = true;
115 }
116 }
117 return Body;
118 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D))
119 return BD->getBody();
120 else if (const FunctionTemplateDecl *FunTmpl
121 = dyn_cast_or_null<FunctionTemplateDecl>(D))
122 return FunTmpl->getTemplatedDecl()->getBody();
123
124 llvm_unreachable("unknown code decl");
125 }
126
getBody() const127 Stmt *AnalysisDeclContext::getBody() const {
128 bool Tmp;
129 return getBody(Tmp);
130 }
131
isBodyAutosynthesized() const132 bool AnalysisDeclContext::isBodyAutosynthesized() const {
133 bool Tmp;
134 getBody(Tmp);
135 return Tmp;
136 }
137
isBodyAutosynthesizedFromModelFile() const138 bool AnalysisDeclContext::isBodyAutosynthesizedFromModelFile() const {
139 bool Tmp;
140 Stmt *Body = getBody(Tmp);
141 return Tmp && Body->getLocStart().isValid();
142 }
143
144 /// Returns true if \param VD is an Objective-C implicit 'self' parameter.
isSelfDecl(const VarDecl * VD)145 static bool isSelfDecl(const VarDecl *VD) {
146 return isa<ImplicitParamDecl>(VD) && VD->getName() == "self";
147 }
148
getSelfDecl() const149 const ImplicitParamDecl *AnalysisDeclContext::getSelfDecl() const {
150 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
151 return MD->getSelfDecl();
152 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
153 // See if 'self' was captured by the block.
154 for (const auto &I : BD->captures()) {
155 const VarDecl *VD = I.getVariable();
156 if (isSelfDecl(VD))
157 return dyn_cast<ImplicitParamDecl>(VD);
158 }
159 }
160
161 auto *CXXMethod = dyn_cast<CXXMethodDecl>(D);
162 if (!CXXMethod)
163 return nullptr;
164
165 const CXXRecordDecl *parent = CXXMethod->getParent();
166 if (!parent->isLambda())
167 return nullptr;
168
169 for (const LambdaCapture &LC : parent->captures()) {
170 if (!LC.capturesVariable())
171 continue;
172
173 VarDecl *VD = LC.getCapturedVar();
174 if (isSelfDecl(VD))
175 return dyn_cast<ImplicitParamDecl>(VD);
176 }
177
178 return nullptr;
179 }
180
registerForcedBlockExpression(const Stmt * stmt)181 void AnalysisDeclContext::registerForcedBlockExpression(const Stmt *stmt) {
182 if (!forcedBlkExprs)
183 forcedBlkExprs = new CFG::BuildOptions::ForcedBlkExprs();
184 // Default construct an entry for 'stmt'.
185 if (const Expr *e = dyn_cast<Expr>(stmt))
186 stmt = e->IgnoreParens();
187 (void) (*forcedBlkExprs)[stmt];
188 }
189
190 const CFGBlock *
getBlockForRegisteredExpression(const Stmt * stmt)191 AnalysisDeclContext::getBlockForRegisteredExpression(const Stmt *stmt) {
192 assert(forcedBlkExprs);
193 if (const Expr *e = dyn_cast<Expr>(stmt))
194 stmt = e->IgnoreParens();
195 CFG::BuildOptions::ForcedBlkExprs::const_iterator itr =
196 forcedBlkExprs->find(stmt);
197 assert(itr != forcedBlkExprs->end());
198 return itr->second;
199 }
200
201 /// Add each synthetic statement in the CFG to the parent map, using the
202 /// source statement's parent.
addParentsForSyntheticStmts(const CFG * TheCFG,ParentMap & PM)203 static void addParentsForSyntheticStmts(const CFG *TheCFG, ParentMap &PM) {
204 if (!TheCFG)
205 return;
206
207 for (CFG::synthetic_stmt_iterator I = TheCFG->synthetic_stmt_begin(),
208 E = TheCFG->synthetic_stmt_end();
209 I != E; ++I) {
210 PM.setParent(I->first, PM.getParent(I->second));
211 }
212 }
213
getCFG()214 CFG *AnalysisDeclContext::getCFG() {
215 if (!cfgBuildOptions.PruneTriviallyFalseEdges)
216 return getUnoptimizedCFG();
217
218 if (!builtCFG) {
219 cfg = CFG::buildCFG(D, getBody(), &D->getASTContext(), cfgBuildOptions);
220 // Even when the cfg is not successfully built, we don't
221 // want to try building it again.
222 builtCFG = true;
223
224 if (PM)
225 addParentsForSyntheticStmts(cfg.get(), *PM);
226
227 // The Observer should only observe one build of the CFG.
228 getCFGBuildOptions().Observer = nullptr;
229 }
230 return cfg.get();
231 }
232
getUnoptimizedCFG()233 CFG *AnalysisDeclContext::getUnoptimizedCFG() {
234 if (!builtCompleteCFG) {
235 SaveAndRestore<bool> NotPrune(cfgBuildOptions.PruneTriviallyFalseEdges,
236 false);
237 completeCFG =
238 CFG::buildCFG(D, getBody(), &D->getASTContext(), cfgBuildOptions);
239 // Even when the cfg is not successfully built, we don't
240 // want to try building it again.
241 builtCompleteCFG = true;
242
243 if (PM)
244 addParentsForSyntheticStmts(completeCFG.get(), *PM);
245
246 // The Observer should only observe one build of the CFG.
247 getCFGBuildOptions().Observer = nullptr;
248 }
249 return completeCFG.get();
250 }
251
getCFGStmtMap()252 CFGStmtMap *AnalysisDeclContext::getCFGStmtMap() {
253 if (cfgStmtMap)
254 return cfgStmtMap.get();
255
256 if (CFG *c = getCFG()) {
257 cfgStmtMap.reset(CFGStmtMap::Build(c, &getParentMap()));
258 return cfgStmtMap.get();
259 }
260
261 return nullptr;
262 }
263
getCFGReachablityAnalysis()264 CFGReverseBlockReachabilityAnalysis *AnalysisDeclContext::getCFGReachablityAnalysis() {
265 if (CFA)
266 return CFA.get();
267
268 if (CFG *c = getCFG()) {
269 CFA.reset(new CFGReverseBlockReachabilityAnalysis(*c));
270 return CFA.get();
271 }
272
273 return nullptr;
274 }
275
dumpCFG(bool ShowColors)276 void AnalysisDeclContext::dumpCFG(bool ShowColors) {
277 getCFG()->dump(getASTContext().getLangOpts(), ShowColors);
278 }
279
getParentMap()280 ParentMap &AnalysisDeclContext::getParentMap() {
281 if (!PM) {
282 PM.reset(new ParentMap(getBody()));
283 if (const CXXConstructorDecl *C = dyn_cast<CXXConstructorDecl>(getDecl())) {
284 for (const auto *I : C->inits()) {
285 PM->addStmt(I->getInit());
286 }
287 }
288 if (builtCFG)
289 addParentsForSyntheticStmts(getCFG(), *PM);
290 if (builtCompleteCFG)
291 addParentsForSyntheticStmts(getUnoptimizedCFG(), *PM);
292 }
293 return *PM;
294 }
295
getPseudoConstantAnalysis()296 PseudoConstantAnalysis *AnalysisDeclContext::getPseudoConstantAnalysis() {
297 if (!PCA)
298 PCA.reset(new PseudoConstantAnalysis(getBody()));
299 return PCA.get();
300 }
301
getContext(const Decl * D)302 AnalysisDeclContext *AnalysisDeclContextManager::getContext(const Decl *D) {
303 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
304 // Calling 'hasBody' replaces 'FD' in place with the FunctionDecl
305 // that has the body.
306 FD->hasBody(FD);
307 D = FD;
308 }
309
310 AnalysisDeclContext *&AC = Contexts[D];
311 if (!AC)
312 AC = new AnalysisDeclContext(this, D, cfgBuildOptions);
313 return AC;
314 }
315
316 const StackFrameContext *
getStackFrame(LocationContext const * Parent,const Stmt * S,const CFGBlock * Blk,unsigned Idx)317 AnalysisDeclContext::getStackFrame(LocationContext const *Parent, const Stmt *S,
318 const CFGBlock *Blk, unsigned Idx) {
319 return getLocationContextManager().getStackFrame(this, Parent, S, Blk, Idx);
320 }
321
322 const BlockInvocationContext *
getBlockInvocationContext(const LocationContext * parent,const clang::BlockDecl * BD,const void * ContextData)323 AnalysisDeclContext::getBlockInvocationContext(const LocationContext *parent,
324 const clang::BlockDecl *BD,
325 const void *ContextData) {
326 return getLocationContextManager().getBlockInvocationContext(this, parent,
327 BD, ContextData);
328 }
329
isInStdNamespace(const Decl * D)330 bool AnalysisDeclContext::isInStdNamespace(const Decl *D) {
331 const DeclContext *DC = D->getDeclContext()->getEnclosingNamespaceContext();
332 const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC);
333 if (!ND)
334 return false;
335
336 while (const DeclContext *Parent = ND->getParent()) {
337 if (!isa<NamespaceDecl>(Parent))
338 break;
339 ND = cast<NamespaceDecl>(Parent);
340 }
341
342 return ND->isStdNamespace();
343 }
344
getLocationContextManager()345 LocationContextManager & AnalysisDeclContext::getLocationContextManager() {
346 assert(Manager &&
347 "Cannot create LocationContexts without an AnalysisDeclContextManager!");
348 return Manager->getLocationContextManager();
349 }
350
351 //===----------------------------------------------------------------------===//
352 // FoldingSet profiling.
353 //===----------------------------------------------------------------------===//
354
ProfileCommon(llvm::FoldingSetNodeID & ID,ContextKind ck,AnalysisDeclContext * ctx,const LocationContext * parent,const void * data)355 void LocationContext::ProfileCommon(llvm::FoldingSetNodeID &ID,
356 ContextKind ck,
357 AnalysisDeclContext *ctx,
358 const LocationContext *parent,
359 const void *data) {
360 ID.AddInteger(ck);
361 ID.AddPointer(ctx);
362 ID.AddPointer(parent);
363 ID.AddPointer(data);
364 }
365
Profile(llvm::FoldingSetNodeID & ID)366 void StackFrameContext::Profile(llvm::FoldingSetNodeID &ID) {
367 Profile(ID, getAnalysisDeclContext(), getParent(), CallSite, Block, Index);
368 }
369
Profile(llvm::FoldingSetNodeID & ID)370 void ScopeContext::Profile(llvm::FoldingSetNodeID &ID) {
371 Profile(ID, getAnalysisDeclContext(), getParent(), Enter);
372 }
373
Profile(llvm::FoldingSetNodeID & ID)374 void BlockInvocationContext::Profile(llvm::FoldingSetNodeID &ID) {
375 Profile(ID, getAnalysisDeclContext(), getParent(), BD, ContextData);
376 }
377
378 //===----------------------------------------------------------------------===//
379 // LocationContext creation.
380 //===----------------------------------------------------------------------===//
381
382 template <typename LOC, typename DATA>
383 const LOC*
getLocationContext(AnalysisDeclContext * ctx,const LocationContext * parent,const DATA * d)384 LocationContextManager::getLocationContext(AnalysisDeclContext *ctx,
385 const LocationContext *parent,
386 const DATA *d) {
387 llvm::FoldingSetNodeID ID;
388 LOC::Profile(ID, ctx, parent, d);
389 void *InsertPos;
390
391 LOC *L = cast_or_null<LOC>(Contexts.FindNodeOrInsertPos(ID, InsertPos));
392
393 if (!L) {
394 L = new LOC(ctx, parent, d);
395 Contexts.InsertNode(L, InsertPos);
396 }
397 return L;
398 }
399
400 const StackFrameContext*
getStackFrame(AnalysisDeclContext * ctx,const LocationContext * parent,const Stmt * s,const CFGBlock * blk,unsigned idx)401 LocationContextManager::getStackFrame(AnalysisDeclContext *ctx,
402 const LocationContext *parent,
403 const Stmt *s,
404 const CFGBlock *blk, unsigned idx) {
405 llvm::FoldingSetNodeID ID;
406 StackFrameContext::Profile(ID, ctx, parent, s, blk, idx);
407 void *InsertPos;
408 StackFrameContext *L =
409 cast_or_null<StackFrameContext>(Contexts.FindNodeOrInsertPos(ID, InsertPos));
410 if (!L) {
411 L = new StackFrameContext(ctx, parent, s, blk, idx);
412 Contexts.InsertNode(L, InsertPos);
413 }
414 return L;
415 }
416
417 const ScopeContext *
getScope(AnalysisDeclContext * ctx,const LocationContext * parent,const Stmt * s)418 LocationContextManager::getScope(AnalysisDeclContext *ctx,
419 const LocationContext *parent,
420 const Stmt *s) {
421 return getLocationContext<ScopeContext, Stmt>(ctx, parent, s);
422 }
423
424 const BlockInvocationContext *
getBlockInvocationContext(AnalysisDeclContext * ctx,const LocationContext * parent,const BlockDecl * BD,const void * ContextData)425 LocationContextManager::getBlockInvocationContext(AnalysisDeclContext *ctx,
426 const LocationContext *parent,
427 const BlockDecl *BD,
428 const void *ContextData) {
429 llvm::FoldingSetNodeID ID;
430 BlockInvocationContext::Profile(ID, ctx, parent, BD, ContextData);
431 void *InsertPos;
432 BlockInvocationContext *L =
433 cast_or_null<BlockInvocationContext>(Contexts.FindNodeOrInsertPos(ID,
434 InsertPos));
435 if (!L) {
436 L = new BlockInvocationContext(ctx, parent, BD, ContextData);
437 Contexts.InsertNode(L, InsertPos);
438 }
439 return L;
440 }
441
442 //===----------------------------------------------------------------------===//
443 // LocationContext methods.
444 //===----------------------------------------------------------------------===//
445
getCurrentStackFrame() const446 const StackFrameContext *LocationContext::getCurrentStackFrame() const {
447 const LocationContext *LC = this;
448 while (LC) {
449 if (const StackFrameContext *SFC = dyn_cast<StackFrameContext>(LC))
450 return SFC;
451 LC = LC->getParent();
452 }
453 return nullptr;
454 }
455
inTopFrame() const456 bool LocationContext::inTopFrame() const {
457 return getCurrentStackFrame()->inTopFrame();
458 }
459
isParentOf(const LocationContext * LC) const460 bool LocationContext::isParentOf(const LocationContext *LC) const {
461 do {
462 const LocationContext *Parent = LC->getParent();
463 if (Parent == this)
464 return true;
465 else
466 LC = Parent;
467 } while (LC);
468
469 return false;
470 }
471
dumpStack(raw_ostream & OS,StringRef Indent) const472 void LocationContext::dumpStack(raw_ostream &OS, StringRef Indent) const {
473 ASTContext &Ctx = getAnalysisDeclContext()->getASTContext();
474 PrintingPolicy PP(Ctx.getLangOpts());
475 PP.TerseOutput = 1;
476
477 unsigned Frame = 0;
478 for (const LocationContext *LCtx = this; LCtx; LCtx = LCtx->getParent()) {
479 switch (LCtx->getKind()) {
480 case StackFrame:
481 OS << Indent << '#' << Frame++ << ' ';
482 cast<StackFrameContext>(LCtx)->getDecl()->print(OS, PP);
483 OS << '\n';
484 break;
485 case Scope:
486 OS << Indent << " (scope)\n";
487 break;
488 case Block:
489 OS << Indent << " (block context: "
490 << cast<BlockInvocationContext>(LCtx)->getContextData()
491 << ")\n";
492 break;
493 }
494 }
495 }
496
dumpStack() const497 LLVM_DUMP_METHOD void LocationContext::dumpStack() const {
498 dumpStack(llvm::errs());
499 }
500
501 //===----------------------------------------------------------------------===//
502 // Lazily generated map to query the external variables referenced by a Block.
503 //===----------------------------------------------------------------------===//
504
505 namespace {
506 class FindBlockDeclRefExprsVals : public StmtVisitor<FindBlockDeclRefExprsVals>{
507 BumpVector<const VarDecl*> &BEVals;
508 BumpVectorContext &BC;
509 llvm::SmallPtrSet<const VarDecl*, 4> Visited;
510 llvm::SmallPtrSet<const DeclContext*, 4> IgnoredContexts;
511 public:
FindBlockDeclRefExprsVals(BumpVector<const VarDecl * > & bevals,BumpVectorContext & bc)512 FindBlockDeclRefExprsVals(BumpVector<const VarDecl*> &bevals,
513 BumpVectorContext &bc)
514 : BEVals(bevals), BC(bc) {}
515
VisitStmt(Stmt * S)516 void VisitStmt(Stmt *S) {
517 for (Stmt *Child : S->children())
518 if (Child)
519 Visit(Child);
520 }
521
VisitDeclRefExpr(DeclRefExpr * DR)522 void VisitDeclRefExpr(DeclRefExpr *DR) {
523 // Non-local variables are also directly modified.
524 if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
525 if (!VD->hasLocalStorage()) {
526 if (Visited.insert(VD).second)
527 BEVals.push_back(VD, BC);
528 }
529 }
530 }
531
VisitBlockExpr(BlockExpr * BR)532 void VisitBlockExpr(BlockExpr *BR) {
533 // Blocks containing blocks can transitively capture more variables.
534 IgnoredContexts.insert(BR->getBlockDecl());
535 Visit(BR->getBlockDecl()->getBody());
536 }
537
VisitPseudoObjectExpr(PseudoObjectExpr * PE)538 void VisitPseudoObjectExpr(PseudoObjectExpr *PE) {
539 for (PseudoObjectExpr::semantics_iterator it = PE->semantics_begin(),
540 et = PE->semantics_end(); it != et; ++it) {
541 Expr *Semantic = *it;
542 if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Semantic))
543 Semantic = OVE->getSourceExpr();
544 Visit(Semantic);
545 }
546 }
547 };
548 } // end anonymous namespace
549
550 typedef BumpVector<const VarDecl*> DeclVec;
551
LazyInitializeReferencedDecls(const BlockDecl * BD,void * & Vec,llvm::BumpPtrAllocator & A)552 static DeclVec* LazyInitializeReferencedDecls(const BlockDecl *BD,
553 void *&Vec,
554 llvm::BumpPtrAllocator &A) {
555 if (Vec)
556 return (DeclVec*) Vec;
557
558 BumpVectorContext BC(A);
559 DeclVec *BV = (DeclVec*) A.Allocate<DeclVec>();
560 new (BV) DeclVec(BC, 10);
561
562 // Go through the capture list.
563 for (const auto &CI : BD->captures()) {
564 BV->push_back(CI.getVariable(), BC);
565 }
566
567 // Find the referenced global/static variables.
568 FindBlockDeclRefExprsVals F(*BV, BC);
569 F.Visit(BD->getBody());
570
571 Vec = BV;
572 return BV;
573 }
574
575 llvm::iterator_range<AnalysisDeclContext::referenced_decls_iterator>
getReferencedBlockVars(const BlockDecl * BD)576 AnalysisDeclContext::getReferencedBlockVars(const BlockDecl *BD) {
577 if (!ReferencedBlockVars)
578 ReferencedBlockVars = new llvm::DenseMap<const BlockDecl*,void*>();
579
580 const DeclVec *V =
581 LazyInitializeReferencedDecls(BD, (*ReferencedBlockVars)[BD], A);
582 return llvm::make_range(V->begin(), V->end());
583 }
584
getAnalysisImpl(const void * tag)585 ManagedAnalysis *&AnalysisDeclContext::getAnalysisImpl(const void *tag) {
586 if (!ManagedAnalyses)
587 ManagedAnalyses = new ManagedAnalysisMap();
588 ManagedAnalysisMap *M = (ManagedAnalysisMap*) ManagedAnalyses;
589 return (*M)[tag];
590 }
591
592 //===----------------------------------------------------------------------===//
593 // Cleanup.
594 //===----------------------------------------------------------------------===//
595
~ManagedAnalysis()596 ManagedAnalysis::~ManagedAnalysis() {}
597
~AnalysisDeclContext()598 AnalysisDeclContext::~AnalysisDeclContext() {
599 delete forcedBlkExprs;
600 delete ReferencedBlockVars;
601 // Release the managed analyses.
602 if (ManagedAnalyses) {
603 ManagedAnalysisMap *M = (ManagedAnalysisMap*) ManagedAnalyses;
604 llvm::DeleteContainerSeconds(*M);
605 delete M;
606 }
607 }
608
~AnalysisDeclContextManager()609 AnalysisDeclContextManager::~AnalysisDeclContextManager() {
610 llvm::DeleteContainerSeconds(Contexts);
611 }
612
~LocationContext()613 LocationContext::~LocationContext() {}
614
~LocationContextManager()615 LocationContextManager::~LocationContextManager() {
616 clear();
617 }
618
clear()619 void LocationContextManager::clear() {
620 for (llvm::FoldingSet<LocationContext>::iterator I = Contexts.begin(),
621 E = Contexts.end(); I != E; ) {
622 LocationContext *LC = &*I;
623 ++I;
624 delete LC;
625 }
626
627 Contexts.clear();
628 }
629
630