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llvm-project/clang/lib/Analysis/AnalysisDeclContext.cpp
David Stone 1eea63811a
[clang][NFC] Use constructor instead of factory function in CFGStmtMap (#172530) 
`CFGStmtMap::Build` accepts pointers and returns a pointer to
dynamically allocated memory. In the one location where the type is
actually constructed, the pointers are guaranteed to be non-null. By
accepting references to statically enforce this, we can remove the only
way for the construction to fail.

By making this change, we also allow our user to decide how they want to
own the memory (either directly or indirectly). The user does not
actually need dynamic allocation here, so we replace the
`std::unique_ptr` with `std::optional`.

This simplifies the code by requiring fewer checks, makes comments on
what happens redundant because the code can obviously do only one thing,
avoids potential bugs, and improves performance by allocating less.
2025-12-24 20:25:00 +00:00

709 lines
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//===- AnalysisDeclContext.cpp - Analysis context for Path Sens analysis --===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines AnalysisDeclContext, a class that manages the analysis
// context data for path sensitive analysis.
//
//===----------------------------------------------------------------------===//
#include "clang/Analysis/AnalysisDeclContext.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Expr.h"
#include "clang/AST/LambdaCapture.h"
#include "clang/AST/ParentMap.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Analysis/Analyses/CFGReachabilityAnalysis.h"
#include "clang/Analysis/BodyFarm.h"
#include "clang/Analysis/CFG.h"
#include "clang/Analysis/CFGStmtMap.h"
#include "clang/Analysis/Support/BumpVector.h"
#include "clang/Basic/JsonSupport.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/SaveAndRestore.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <memory>
using namespace clang;
using ManagedAnalysisMap = llvm::DenseMap<const void *, std::unique_ptr<ManagedAnalysis>>;
AnalysisDeclContext::AnalysisDeclContext(AnalysisDeclContextManager *ADCMgr,
const Decl *D,
const CFG::BuildOptions &Options)
: ADCMgr(ADCMgr), D(D), cfgBuildOptions(Options) {
cfgBuildOptions.forcedBlkExprs = &forcedBlkExprs;
}
AnalysisDeclContext::AnalysisDeclContext(AnalysisDeclContextManager *ADCMgr,
const Decl *D)
: ADCMgr(ADCMgr), D(D) {
cfgBuildOptions.forcedBlkExprs = &forcedBlkExprs;
}
AnalysisDeclContextManager::AnalysisDeclContextManager(
ASTContext &ASTCtx, bool useUnoptimizedCFG, bool addImplicitDtors,
bool addInitializers, bool addTemporaryDtors, bool addLifetime,
bool addLoopExit, bool addScopes, bool synthesizeBodies,
bool addStaticInitBranch, bool addCXXNewAllocator,
bool addRichCXXConstructors, bool markElidedCXXConstructors,
bool addVirtualBaseBranches, std::unique_ptr<CodeInjector> injector)
: Injector(std::move(injector)), FunctionBodyFarm(ASTCtx, Injector.get()),
SynthesizeBodies(synthesizeBodies) {
cfgBuildOptions.PruneTriviallyFalseEdges = !useUnoptimizedCFG;
cfgBuildOptions.AddImplicitDtors = addImplicitDtors;
cfgBuildOptions.AddInitializers = addInitializers;
cfgBuildOptions.AddTemporaryDtors = addTemporaryDtors;
cfgBuildOptions.AddLifetime = addLifetime;
cfgBuildOptions.AddLoopExit = addLoopExit;
cfgBuildOptions.AddScopes = addScopes;
cfgBuildOptions.AddStaticInitBranches = addStaticInitBranch;
cfgBuildOptions.AddCXXNewAllocator = addCXXNewAllocator;
cfgBuildOptions.AddRichCXXConstructors = addRichCXXConstructors;
cfgBuildOptions.MarkElidedCXXConstructors = markElidedCXXConstructors;
cfgBuildOptions.AddVirtualBaseBranches = addVirtualBaseBranches;
}
void AnalysisDeclContextManager::clear() { Contexts.clear(); }
Stmt *AnalysisDeclContext::getBody(bool &IsAutosynthesized) const {
IsAutosynthesized = false;
if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
Stmt *Body = FD->getBody();
if (auto *CoroBody = dyn_cast_or_null<CoroutineBodyStmt>(Body))
Body = CoroBody->getBody();
if (ADCMgr && ADCMgr->synthesizeBodies()) {
Stmt *SynthesizedBody = ADCMgr->getBodyFarm().getBody(FD);
if (SynthesizedBody) {
Body = SynthesizedBody;
IsAutosynthesized = true;
}
}
return Body;
}
else if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) {
Stmt *Body = MD->getBody();
if (ADCMgr && ADCMgr->synthesizeBodies()) {
Stmt *SynthesizedBody = ADCMgr->getBodyFarm().getBody(MD);
if (SynthesizedBody) {
Body = SynthesizedBody;
IsAutosynthesized = true;
}
}
return Body;
} else if (const auto *BD = dyn_cast<BlockDecl>(D))
return BD->getBody();
else if (const auto *FunTmpl = dyn_cast_or_null<FunctionTemplateDecl>(D))
return FunTmpl->getTemplatedDecl()->getBody();
else if (const auto *VD = dyn_cast_or_null<VarDecl>(D)) {
if (VD->isFileVarDecl()) {
return const_cast<Stmt *>(dyn_cast_or_null<Stmt>(VD->getInit()));
}
}
llvm_unreachable("unknown code decl");
}
Stmt *AnalysisDeclContext::getBody() const {
bool Tmp;
return getBody(Tmp);
}
bool AnalysisDeclContext::isBodyAutosynthesized() const {
bool Tmp;
getBody(Tmp);
return Tmp;
}
bool AnalysisDeclContext::isBodyAutosynthesizedFromModelFile() const {
bool Tmp;
Stmt *Body = getBody(Tmp);
return Tmp && Body->getBeginLoc().isValid();
}
/// Returns true if \param VD is an Objective-C implicit 'self' parameter.
static bool isSelfDecl(const VarDecl *VD) {
return isa_and_nonnull<ImplicitParamDecl>(VD) && VD->getName() == "self";
}
const ImplicitParamDecl *AnalysisDeclContext::getSelfDecl() const {
if (const auto *MD = dyn_cast<ObjCMethodDecl>(D))
return MD->getSelfDecl();
if (const auto *BD = dyn_cast<BlockDecl>(D)) {
// See if 'self' was captured by the block.
for (const auto &I : BD->captures()) {
const VarDecl *VD = I.getVariable();
if (isSelfDecl(VD))
return dyn_cast<ImplicitParamDecl>(VD);
}
}
auto *CXXMethod = dyn_cast<CXXMethodDecl>(D);
if (!CXXMethod)
return nullptr;
const CXXRecordDecl *parent = CXXMethod->getParent();
if (!parent->isLambda())
return nullptr;
for (const auto &LC : parent->captures()) {
if (!LC.capturesVariable())
continue;
ValueDecl *VD = LC.getCapturedVar();
if (isSelfDecl(dyn_cast<VarDecl>(VD)))
return dyn_cast<ImplicitParamDecl>(VD);
}
return nullptr;
}
void AnalysisDeclContext::registerForcedBlockExpression(const Stmt *stmt) {
if (!forcedBlkExprs)
forcedBlkExprs = new CFG::BuildOptions::ForcedBlkExprs();
// Default construct an entry for 'stmt'.
if (const auto *e = dyn_cast<Expr>(stmt))
stmt = e->IgnoreParens();
(void) (*forcedBlkExprs)[stmt];
}
const CFGBlock *
AnalysisDeclContext::getBlockForRegisteredExpression(const Stmt *stmt) {
assert(forcedBlkExprs);
if (const auto *e = dyn_cast<Expr>(stmt))
stmt = e->IgnoreParens();
CFG::BuildOptions::ForcedBlkExprs::const_iterator itr =
forcedBlkExprs->find(stmt);
assert(itr != forcedBlkExprs->end());
return itr->second;
}
/// Add each synthetic statement in the CFG to the parent map, using the
/// source statement's parent.
static void addParentsForSyntheticStmts(const CFG *TheCFG, ParentMap &PM) {
if (!TheCFG)
return;
for (CFG::synthetic_stmt_iterator I = TheCFG->synthetic_stmt_begin(),
E = TheCFG->synthetic_stmt_end();
I != E; ++I) {
PM.setParent(I->first, PM.getParent(I->second));
}
}
CFG *AnalysisDeclContext::getCFG() {
if (!cfgBuildOptions.PruneTriviallyFalseEdges)
return getUnoptimizedCFG();
if (!builtCFG) {
cfg = CFG::buildCFG(D, getBody(), &D->getASTContext(), cfgBuildOptions);
// Even when the cfg is not successfully built, we don't
// want to try building it again.
builtCFG = true;
if (PM)
addParentsForSyntheticStmts(cfg.get(), *PM);
// The Observer should only observe one build of the CFG.
getCFGBuildOptions().Observer = nullptr;
}
return cfg.get();
}
CFG *AnalysisDeclContext::getUnoptimizedCFG() {
if (!builtCompleteCFG) {
SaveAndRestore NotPrune(cfgBuildOptions.PruneTriviallyFalseEdges, false);
completeCFG =
CFG::buildCFG(D, getBody(), &D->getASTContext(), cfgBuildOptions);
// Even when the cfg is not successfully built, we don't
// want to try building it again.
builtCompleteCFG = true;
if (PM)
addParentsForSyntheticStmts(completeCFG.get(), *PM);
// The Observer should only observe one build of the CFG.
getCFGBuildOptions().Observer = nullptr;
}
return completeCFG.get();
}
const CFGStmtMap *AnalysisDeclContext::getCFGStmtMap() {
if (cfgStmtMap)
return &*cfgStmtMap;
if (const CFG *c = getCFG()) {
cfgStmtMap.emplace(*c, getParentMap());
return &*cfgStmtMap;
}
return nullptr;
}
CFGReverseBlockReachabilityAnalysis *AnalysisDeclContext::getCFGReachablityAnalysis() {
if (CFA)
return CFA.get();
if (CFG *c = getCFG()) {
CFA.reset(new CFGReverseBlockReachabilityAnalysis(*c));
return CFA.get();
}
return nullptr;
}
void AnalysisDeclContext::dumpCFG(bool ShowColors) {
getCFG()->dump(getASTContext().getLangOpts(), ShowColors);
}
ParentMap &AnalysisDeclContext::getParentMap() {
if (!PM) {
PM.reset(new ParentMap(getBody()));
if (const auto *C = dyn_cast<CXXConstructorDecl>(getDecl())) {
for (const auto *I : C->inits()) {
PM->addStmt(I->getInit());
}
}
if (builtCFG)
addParentsForSyntheticStmts(getCFG(), *PM);
if (builtCompleteCFG)
addParentsForSyntheticStmts(getUnoptimizedCFG(), *PM);
}
return *PM;
}
AnalysisDeclContext *AnalysisDeclContextManager::getContext(const Decl *D) {
if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
// Calling 'hasBody' replaces 'FD' in place with the FunctionDecl
// that has the body.
FD->hasBody(FD);
D = FD;
}
std::unique_ptr<AnalysisDeclContext> &AC = Contexts[D];
if (!AC)
AC = std::make_unique<AnalysisDeclContext>(this, D, cfgBuildOptions);
return AC.get();
}
BodyFarm &AnalysisDeclContextManager::getBodyFarm() { return FunctionBodyFarm; }
const StackFrameContext *
AnalysisDeclContext::getStackFrame(const LocationContext *ParentLC,
const Stmt *S, const CFGBlock *Blk,
unsigned BlockCount, unsigned Index) {
return getLocationContextManager().getStackFrame(this, ParentLC, S, Blk,
BlockCount, Index);
}
const BlockInvocationContext *AnalysisDeclContext::getBlockInvocationContext(
const LocationContext *ParentLC, const BlockDecl *BD, const void *Data) {
return getLocationContextManager().getBlockInvocationContext(this, ParentLC,
BD, Data);
}
bool AnalysisDeclContext::isInStdNamespace(const Decl *D) {
const DeclContext *DC = D->getDeclContext()->getEnclosingNamespaceContext();
const auto *ND = dyn_cast<NamespaceDecl>(DC);
if (!ND)
return false;
while (const DeclContext *Parent = ND->getParent()) {
if (!isa<NamespaceDecl>(Parent))
break;
ND = cast<NamespaceDecl>(Parent);
}
return ND->isStdNamespace();
}
std::string AnalysisDeclContext::getFunctionName(const Decl *D) {
std::string Str;
llvm::raw_string_ostream OS(Str);
const ASTContext &Ctx = D->getASTContext();
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
OS << FD->getQualifiedNameAsString();
// In C++, there are overloads.
if (Ctx.getLangOpts().CPlusPlus) {
OS << '(';
for (const auto &P : FD->parameters()) {
if (P != *FD->param_begin())
OS << ", ";
OS << P->getType();
}
OS << ')';
}
} else if (isa<BlockDecl>(D)) {
PresumedLoc Loc = Ctx.getSourceManager().getPresumedLoc(D->getLocation());
if (Loc.isValid()) {
OS << "block (line: " << Loc.getLine() << ", col: " << Loc.getColumn()
<< ')';
}
} else if (const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D)) {
// FIXME: copy-pasted from CGDebugInfo.cpp.
OS << (OMD->isInstanceMethod() ? '-' : '+') << '[';
const DeclContext *DC = OMD->getDeclContext();
if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) {
OS << OID->getName();
} else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) {
OS << OID->getName();
} else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) {
if (OC->IsClassExtension()) {
OS << OC->getClassInterface()->getName();
} else {
OS << OC->getIdentifier()->getNameStart() << '('
<< OC->getIdentifier()->getNameStart() << ')';
}
} else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) {
OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')';
}
OS << ' ' << OMD->getSelector().getAsString() << ']';
}
return Str;
}
LocationContextManager &AnalysisDeclContext::getLocationContextManager() {
assert(
ADCMgr &&
"Cannot create LocationContexts without an AnalysisDeclContextManager!");
return ADCMgr->getLocationContextManager();
}
//===----------------------------------------------------------------------===//
// FoldingSet profiling.
//===----------------------------------------------------------------------===//
void LocationContext::ProfileCommon(llvm::FoldingSetNodeID &ID,
ContextKind ck,
AnalysisDeclContext *ctx,
const LocationContext *parent,
const void *data) {
ID.AddInteger(ck);
ID.AddPointer(ctx);
ID.AddPointer(parent);
ID.AddPointer(data);
}
void StackFrameContext::Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getAnalysisDeclContext(), getParent(), CallSite, Block,
BlockCount, Index);
}
void BlockInvocationContext::Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getAnalysisDeclContext(), getParent(), BD, Data);
}
//===----------------------------------------------------------------------===//
// LocationContext creation.
//===----------------------------------------------------------------------===//
const StackFrameContext *LocationContextManager::getStackFrame(
AnalysisDeclContext *ctx, const LocationContext *parent, const Stmt *s,
const CFGBlock *blk, unsigned blockCount, unsigned idx) {
llvm::FoldingSetNodeID ID;
StackFrameContext::Profile(ID, ctx, parent, s, blk, blockCount, idx);
void *InsertPos;
auto *L =
cast_or_null<StackFrameContext>(Contexts.FindNodeOrInsertPos(ID, InsertPos));
if (!L) {
L = new StackFrameContext(ctx, parent, s, blk, blockCount, idx, ++NewID);
Contexts.InsertNode(L, InsertPos);
}
return L;
}
const BlockInvocationContext *LocationContextManager::getBlockInvocationContext(
AnalysisDeclContext *ADC, const LocationContext *ParentLC,
const BlockDecl *BD, const void *Data) {
llvm::FoldingSetNodeID ID;
BlockInvocationContext::Profile(ID, ADC, ParentLC, BD, Data);
void *InsertPos;
auto *L =
cast_or_null<BlockInvocationContext>(Contexts.FindNodeOrInsertPos(ID,
InsertPos));
if (!L) {
L = new BlockInvocationContext(ADC, ParentLC, BD, Data, ++NewID);
Contexts.InsertNode(L, InsertPos);
}
return L;
}
//===----------------------------------------------------------------------===//
// LocationContext methods.
//===----------------------------------------------------------------------===//
const StackFrameContext *LocationContext::getStackFrame() const {
const LocationContext *LC = this;
while (LC) {
if (const auto *SFC = dyn_cast<StackFrameContext>(LC))
return SFC;
LC = LC->getParent();
}
return nullptr;
}
bool LocationContext::inTopFrame() const {
return getStackFrame()->inTopFrame();
}
bool LocationContext::isParentOf(const LocationContext *LC) const {
do {
const LocationContext *Parent = LC->getParent();
if (Parent == this)
return true;
else
LC = Parent;
} while (LC);
return false;
}
static void printLocation(raw_ostream &Out, const SourceManager &SM,
SourceLocation Loc) {
if (Loc.isFileID() && SM.isInMainFile(Loc))
Out << SM.getExpansionLineNumber(Loc);
else
Loc.print(Out, SM);
}
void LocationContext::dumpStack(raw_ostream &Out) const {
ASTContext &Ctx = getAnalysisDeclContext()->getASTContext();
PrintingPolicy PP(Ctx.getLangOpts());
PP.TerseOutput = 1;
const SourceManager &SM =
getAnalysisDeclContext()->getASTContext().getSourceManager();
unsigned Frame = 0;
for (const LocationContext *LCtx = this; LCtx; LCtx = LCtx->getParent()) {
switch (LCtx->getKind()) {
case StackFrame:
Out << "\t#" << Frame << ' ';
++Frame;
if (const auto *D = dyn_cast<NamedDecl>(LCtx->getDecl()))
Out << "Calling " << AnalysisDeclContext::getFunctionName(D);
else
Out << "Calling anonymous code";
if (const Stmt *S = cast<StackFrameContext>(LCtx)->getCallSite()) {
Out << " at line ";
printLocation(Out, SM, S->getBeginLoc());
}
break;
case Block:
Out << "Invoking block";
if (const Decl *D = cast<BlockInvocationContext>(LCtx)->getDecl()) {
Out << " defined at line ";
printLocation(Out, SM, D->getBeginLoc());
}
break;
}
Out << '\n';
}
}
void LocationContext::printJson(raw_ostream &Out, const char *NL,
unsigned int Space, bool IsDot,
std::function<void(const LocationContext *)>
printMoreInfoPerContext) const {
ASTContext &Ctx = getAnalysisDeclContext()->getASTContext();
PrintingPolicy PP(Ctx.getLangOpts());
PP.TerseOutput = 1;
const SourceManager &SM =
getAnalysisDeclContext()->getASTContext().getSourceManager();
unsigned Frame = 0;
for (const LocationContext *LCtx = this; LCtx; LCtx = LCtx->getParent()) {
Indent(Out, Space, IsDot)
<< "{ \"lctx_id\": " << LCtx->getID() << ", \"location_context\": \"";
switch (LCtx->getKind()) {
case StackFrame:
Out << '#' << Frame << " Call\", \"calling\": \"";
++Frame;
if (const auto *D = dyn_cast<NamedDecl>(LCtx->getDecl()))
Out << D->getQualifiedNameAsString();
else
Out << "anonymous code";
Out << "\", \"location\": ";
if (const Stmt *S = cast<StackFrameContext>(LCtx)->getCallSite()) {
printSourceLocationAsJson(Out, S->getBeginLoc(), SM);
} else {
Out << "null";
}
Out << ", \"items\": ";
break;
case Block:
Out << "Invoking block\" ";
if (const Decl *D = cast<BlockInvocationContext>(LCtx)->getDecl()) {
Out << ", \"location\": ";
printSourceLocationAsJson(Out, D->getBeginLoc(), SM);
Out << ' ';
}
break;
}
printMoreInfoPerContext(LCtx);
Out << '}';
if (LCtx->getParent())
Out << ',';
Out << NL;
}
}
LLVM_DUMP_METHOD void LocationContext::dump() const { printJson(llvm::errs()); }
//===----------------------------------------------------------------------===//
// Lazily generated map to query the external variables referenced by a Block.
//===----------------------------------------------------------------------===//
namespace {
class FindBlockDeclRefExprsVals : public StmtVisitor<FindBlockDeclRefExprsVals>{
BumpVector<const VarDecl *> &BEVals;
BumpVectorContext &BC;
llvm::SmallPtrSet<const VarDecl *, 4> Visited;
llvm::SmallPtrSet<const DeclContext *, 4> IgnoredContexts;
public:
FindBlockDeclRefExprsVals(BumpVector<const VarDecl*> &bevals,
BumpVectorContext &bc)
: BEVals(bevals), BC(bc) {}
void VisitStmt(Stmt *S) {
for (auto *Child : S->children())
if (Child)
Visit(Child);
}
void VisitDeclRefExpr(DeclRefExpr *DR) {
// Non-local variables are also directly modified.
if (const auto *VD = dyn_cast<VarDecl>(DR->getDecl())) {
if (!VD->hasLocalStorage()) {
if (Visited.insert(VD).second)
BEVals.push_back(VD, BC);
}
}
}
void VisitBlockExpr(BlockExpr *BR) {
// Blocks containing blocks can transitively capture more variables.
IgnoredContexts.insert(BR->getBlockDecl());
Visit(BR->getBlockDecl()->getBody());
}
void VisitPseudoObjectExpr(PseudoObjectExpr *PE) {
for (PseudoObjectExpr::semantics_iterator it = PE->semantics_begin(),
et = PE->semantics_end(); it != et; ++it) {
Expr *Semantic = *it;
if (auto *OVE = dyn_cast<OpaqueValueExpr>(Semantic))
Semantic = OVE->getSourceExpr();
Visit(Semantic);
}
}
};
} // namespace
using DeclVec = BumpVector<const VarDecl *>;
static DeclVec* LazyInitializeReferencedDecls(const BlockDecl *BD,
void *&Vec,
llvm::BumpPtrAllocator &A) {
if (Vec)
return (DeclVec*) Vec;
BumpVectorContext BC(A);
DeclVec *BV = (DeclVec*) A.Allocate<DeclVec>();
new (BV) DeclVec(BC, 10);
// Go through the capture list.
for (const auto &CI : BD->captures()) {
BV->push_back(CI.getVariable(), BC);
}
// Find the referenced global/static variables.
FindBlockDeclRefExprsVals F(*BV, BC);
F.Visit(BD->getBody());
Vec = BV;
return BV;
}
llvm::iterator_range<AnalysisDeclContext::referenced_decls_iterator>
AnalysisDeclContext::getReferencedBlockVars(const BlockDecl *BD) {
if (!ReferencedBlockVars)
ReferencedBlockVars = new llvm::DenseMap<const BlockDecl*,void*>();
const DeclVec *V =
LazyInitializeReferencedDecls(BD, (*ReferencedBlockVars)[BD], A);
return llvm::make_range(V->begin(), V->end());
}
std::unique_ptr<ManagedAnalysis> &AnalysisDeclContext::getAnalysisImpl(const void *tag) {
if (!ManagedAnalyses)
ManagedAnalyses = new ManagedAnalysisMap();
ManagedAnalysisMap *M = (ManagedAnalysisMap*) ManagedAnalyses;
return (*M)[tag];
}
//===----------------------------------------------------------------------===//
// Cleanup.
//===----------------------------------------------------------------------===//
ManagedAnalysis::~ManagedAnalysis() = default;
AnalysisDeclContext::~AnalysisDeclContext() {
delete forcedBlkExprs;
delete ReferencedBlockVars;
delete (ManagedAnalysisMap*) ManagedAnalyses;
}
LocationContext::~LocationContext() = default;
LocationContextManager::~LocationContextManager() {
clear();
}
void LocationContextManager::clear() {
for (llvm::FoldingSet<LocationContext>::iterator I = Contexts.begin(),
E = Contexts.end(); I != E; ) {
LocationContext *LC = &*I;
++I;
delete LC;
}
Contexts.clear();
}
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