clang 22.0.0git
CFG.cpp File Reference
#include "clang/Analysis/CFG.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclGroup.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/OperationKinds.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtObjC.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/AST/Type.h"
#include "clang/Analysis/ConstructionContext.h"
#include "clang/Analysis/Support/BumpVector.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/ExceptionSpecificationType.h"
#include "clang/Basic/JsonSupport.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/Specifiers.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/DOTGraphTraits.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/SaveAndRestore.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <memory>
#include <optional>
#include <string>
#include <tuple>
#include <utility>
#include <vector>

Go to the source code of this file.

Classes

struct  llvm::DOTGraphTraits< const CFG * >

Namespaces

namespace  llvm
 Diagnostic wrappers for TextAPI types for error reporting.

Functions

static SourceLocation GetEndLoc (Decl *D)
static bool IsLiteralConstantExpr (const Expr *E)
 Returns true on constant values based around a single IntegerLiteral, CharacterLiteral, or FloatingLiteral.
static const ExprtryTransformToLiteralConstant (const Expr *E)
 Helper for tryNormalizeBinaryOperator.
static std::tuple< const Expr *, BinaryOperatorKind, const Expr * > tryNormalizeBinaryOperator (const BinaryOperator *B)
 Tries to interpret a binary operator into Expr Op NumExpr form, if NumExpr is an integer literal or an enum constant.
static bool areExprTypesCompatible (const Expr *E1, const Expr *E2)
 For an expression x == Foo && x == Bar, this determines whether the Foo and Bar are either of the same enumeration type, or both integer literals.
static TryResult bothKnownTrue (TryResult R1, TryResult R2)
static const VariableArrayTypeFindVA (const Type *t)
static QualType getReferenceInitTemporaryType (const Expr *Init, bool *FoundMTE=nullptr)
 Retrieve the type of the temporary object whose lifetime was extended by a local reference with the given initializer.
static bool isFallthroughStatement (const AttributedStmt *A)
static bool isCXXAssumeAttr (const AttributedStmt *A)
static bool CanThrow (Expr *E, ASTContext &Ctx)
static bool isBuiltinAssumeWithSideEffects (const ASTContext &Ctx, const CallExpr *CE)
static bool shouldAddCase (bool &switchExclusivelyCovered, const Expr::EvalResult *switchCond, const CaseStmt *CS, ASTContext &Ctx)
static void print_initializer (raw_ostream &OS, StmtPrinterHelper &Helper, const CXXCtorInitializer *I)
static void print_construction_context (raw_ostream &OS, StmtPrinterHelper &Helper, const ConstructionContext *CC)
static void print_elem (raw_ostream &OS, StmtPrinterHelper &Helper, const CFGElement &E, bool TerminateWithNewLine=true)
static void print_block (raw_ostream &OS, const CFG *cfg, const CFGBlock &B, StmtPrinterHelper &Helper, bool print_edges, bool ShowColors)
static bool isImmediateSinkBlock (const CFGBlock *Blk)

Variables

static StmtPrinterHelper * GraphHelper

Function Documentation

◆ areExprTypesCompatible()

bool areExprTypesCompatible ( const Expr * E1,
const Expr * E2 )
static

For an expression x == Foo && x == Bar, this determines whether the Foo and Bar are either of the same enumeration type, or both integer literals.

It's an error to pass this arguments that are not either IntegerLiterals or DeclRefExprs (that have decls of type EnumConstantDecl)

Definition at line 147 of file CFG.cpp.

References clang::cast(), and clang::isa().

◆ bothKnownTrue()

TryResult bothKnownTrue ( TryResult R1,
TryResult R2 )
static

Definition at line 422 of file CFG.cpp.

◆ CanThrow()

◆ FindVA()

const VariableArrayType * FindVA ( const Type * t)
static

◆ GetEndLoc()

SourceLocation GetEndLoc ( Decl * D)
static

Definition at line 66 of file CFG.cpp.

References clang::Decl::getLocation().

◆ getReferenceInitTemporaryType()

QualType getReferenceInitTemporaryType ( const Expr * Init,
bool * FoundMTE = nullptr )
static

Retrieve the type of the temporary object whose lifetime was extended by a local reference with the given initializer.

Definition at line 1856 of file CFG.cpp.

References clang::Init.

Referenced by clang::CFGImplicitDtor::getDestructorDecl(), and print_elem().

◆ isBuiltinAssumeWithSideEffects()

bool isBuiltinAssumeWithSideEffects ( const ASTContext & Ctx,
const CallExpr * CE )
static

◆ isCXXAssumeAttr()

bool isCXXAssumeAttr ( const AttributedStmt * A)
static

◆ isFallthroughStatement()

bool isFallthroughStatement ( const AttributedStmt * A)
static

◆ isImmediateSinkBlock()

bool isImmediateSinkBlock ( const CFGBlock * Blk)
static

◆ IsLiteralConstantExpr()

bool IsLiteralConstantExpr ( const Expr * E)
static

Returns true on constant values based around a single IntegerLiteral, CharacterLiteral, or FloatingLiteral.

Allow for use of parentheses, integer casts, and negative signs.

Definition at line 77 of file CFG.cpp.

References clang::Expr::IgnoreParens(), and clang::isa().

Referenced by tryTransformToLiteralConstant().

◆ print_block()

◆ print_construction_context()

◆ print_elem()

void print_elem ( raw_ostream & OS,
StmtPrinterHelper & Helper,
const CFGElement & E,
bool TerminateWithNewLine = true )
static

Definition at line 5873 of file CFG.cpp.

References clang::CFGElement::AutomaticObjectDtor, clang::CFGElement::BaseDtor, clang::CompoundStmt::body_rbegin(), clang::cast(), clang::CFGElement::castAs(), Children, clang::CFGElement::CleanupFunction, clang::CFGElement::Constructor, clang::CFGElement::CXXRecordTypedCall, clang::CFGElement::DeleteDtor, clang::CFGNewAllocator::getAllocatorExpr(), clang::CXXDeleteExpr::getArgument(), clang::CFGElement::getAs(), clang::Type::getAsCXXRecordDecl(), clang::Type::getBaseElementTypeUnsafe(), clang::CFGDeleteDtor::getCXXRecordDecl(), clang::CFGDeleteDtor::getDeleteExpr(), clang::CFGInitializer::getInitializer(), clang::CFGElement::getKind(), clang::NamedDecl::getName(), clang::BinaryOperator::getOpcode(), clang::NamedDecl::getQualifiedNameAsString(), getReferenceInitTemporaryType(), clang::BinaryOperator::getRHS(), clang::CFGStmt::getStmt(), clang::Stmt::getStmtClassName(), clang::StmtExpr::getSubStmt(), clang::CXXBaseSpecifier::getType(), clang::Expr::getType(), clang::ValueDecl::getType(), clang::CFGAutomaticObjDtor::getVarDecl(), clang::CFGLifetimeEnds::getVarDecl(), clang::CFGScopeBegin::getVarDecl(), clang::CFGScopeEnd::getVarDecl(), clang::CFGElement::Initializer, clang::isa(), clang::CFGElement::LifetimeEnds, clang::CFGElement::LoopExit, clang::CFGElement::MemberDtor, clang::CFGElement::NewAllocator, clang::QualType::print(), print_construction_context(), print_initializer(), clang::CFGElement::ScopeBegin, clang::CFGElement::ScopeEnd, clang::CFGElement::Statement, clang::T, and clang::CFGElement::TemporaryDtor.

Referenced by clang::CFGElement::dumpToStream(), and print_block().

◆ print_initializer()

◆ shouldAddCase()

bool shouldAddCase ( bool & switchExclusivelyCovered,
const Expr::EvalResult * switchCond,
const CaseStmt * CS,
ASTContext & Ctx )
static

◆ tryNormalizeBinaryOperator()

std::tuple< const Expr *, BinaryOperatorKind, const Expr * > tryNormalizeBinaryOperator ( const BinaryOperator * B)
static

Tries to interpret a binary operator into Expr Op NumExpr form, if NumExpr is an integer literal or an enum constant.

If this fails, at least one of the returned DeclRefExpr or Expr will be null.

Definition at line 117 of file CFG.cpp.

References clang::BinaryOperator::getLHS(), clang::BinaryOperator::getOpcode(), clang::BinaryOperator::getRHS(), and tryTransformToLiteralConstant().

◆ tryTransformToLiteralConstant()

const Expr * tryTransformToLiteralConstant ( const Expr * E)
static

Helper for tryNormalizeBinaryOperator.

Attempts to extract an IntegerLiteral FloatingLiteral, CharacterLiteral or EnumConstantDecl from the given Expr. If it fails, returns nullptr.

Definition at line 102 of file CFG.cpp.

References clang::Expr::IgnoreParenImpCasts(), clang::Expr::IgnoreParens(), clang::isa(), and IsLiteralConstantExpr().

Referenced by tryNormalizeBinaryOperator().

Variable Documentation

◆ GraphHelper

StmtPrinterHelper* GraphHelper
static