ExprConstant.cpp File Reference

#include "Interp/Context.h"
#include "Interp/Frame.h"
#include "Interp/State.h"
#include "clang/AST/APValue.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTDiagnostic.h"
#include "clang/AST/ASTLambda.h"
#include "clang/AST/Attr.h"
#include "clang/AST/CXXInheritance.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/CurrentSourceLocExprScope.h"
#include "clang/AST/Expr.h"
#include "clang/AST/OSLog.h"
#include "clang/AST/OptionalDiagnostic.h"
#include "clang/AST/RecordLayout.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/APFixedPoint.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/SaveAndRestore.h"
#include "llvm/Support/TimeProfiler.h"
#include "llvm/Support/raw_ostream.h"
#include <cstring>
#include <functional>
#include "clang/AST/TypeNodes.inc"
#include "clang/AST/BuiltinTypes.def"
#include "clang/Basic/OpenCLImageTypes.def"
#include "clang/Basic/OpenCLExtensionTypes.def"
#include "clang/Basic/AArch64SVEACLETypes.def"
#include "clang/Basic/PPCTypes.def"
#include "clang/Basic/RISCVVTypes.def"
#include "clang/AST/StmtNodes.inc"

Include dependency graph for ExprConstant.cpp:

Go to the source code of this file.

Classes
struct	llvm::DenseMapInfo< ObjectUnderConstruction >
struct	DynamicType

Namespaces
	llvm
	YAML serialization mapping.

Macros
#define	DEBUG_TYPE   "exprconstant"
#define	TYPE(Class, Base)
#define	ABSTRACT_TYPE(Class, Base)
#define	NON_CANONICAL_TYPE(Class, Base)
#define	DEPENDENT_TYPE(Class, Base)
#define	NON_CANONICAL_UNLESS_DEPENDENT(Class, Base)
#define	TYPE(ID, BASE)
#define	DEPENDENT_TYPE(ID, BASE)   case Type::ID:
#define	NON_CANONICAL_TYPE(ID, BASE)   case Type::ID:
#define	NON_CANONICAL_UNLESS_DEPENDENT_TYPE(ID, BASE)   case Type::ID:
#define	BUILTIN_TYPE(ID, SINGLETON_ID)
#define	SIGNED_TYPE(ID, SINGLETON_ID)   case BuiltinType::ID: return GCCTypeClass::Integer;
#define	FLOATING_TYPE(ID, SINGLETON_ID)   case BuiltinType::ID: return GCCTypeClass::RealFloat;
#define	PLACEHOLDER_TYPE(ID, SINGLETON_ID)   case BuiltinType::ID: break;
#define	IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix)   case BuiltinType::Id:
#define	EXT_OPAQUE_TYPE(ExtType, Id, Ext)   case BuiltinType::Id:
#define	SVE_TYPE(Name, Id, SingletonId)   case BuiltinType::Id:
#define	PPC_VECTOR_TYPE(Name, Id, Size)   case BuiltinType::Id:
#define	RVV_TYPE(Name, Id, SingletonId)   case BuiltinType::Id:
#define	ABSTRACT_STMT(Node)
#define	STMT(Node, Base)   case Expr::Node##Class:
#define	EXPR(Node, Base)

Typedefs
using	CheckedTemporaries = llvm::SmallPtrSet< const MaterializeTemporaryExpr *, 8 >
	Materialized temporaries that we've already checked to determine if they're initializsed by a constant expression. More...

Enumerations
enum	CheckEvaluationResultKind { CheckEvaluationResultKind::ConstantExpression, CheckEvaluationResultKind::FullyInitialized }
enum	GCCTypeClass {   GCCTypeClass::None = -1, GCCTypeClass::Void = 0, GCCTypeClass::Integer = 1, GCCTypeClass::Enum = 3,   GCCTypeClass::Bool = 4, GCCTypeClass::Pointer = 5, GCCTypeClass::PointerToDataMember = 7, GCCTypeClass::RealFloat = 8,   GCCTypeClass::Complex = 9, GCCTypeClass::PointerToMemberFunction = 12, GCCTypeClass::ClassOrStruct = 12, GCCTypeClass::Union = 13 }
	Values returned by __builtin_classify_type, chosen to match the values produced by GCC's builtin. More...

Functions
static bool	HandleDestruction (EvalInfo &Info, const Expr *E, const LValue &This, QualType ThisType)
	Perform a destructor or pseudo-destructor call on the given object, which might in general not be a complete object. More...
static bool	HandleDestruction (EvalInfo &Info, SourceLocation Loc, APValue::LValueBase LVBase, APValue &Value, QualType T)
	Destroy and end the lifetime of the given complete object. More...
static bool	isRead (AccessKinds AK)
static bool	isModification (AccessKinds AK)
static bool	isAnyAccess (AccessKinds AK)
static bool	isFormalAccess (AccessKinds AK)
	Is this an access per the C++ definition? More...
static bool	isValidIndeterminateAccess (AccessKinds AK)
	Is this kind of axcess valid on an indeterminate object value? More...
static bool	Evaluate (APValue &Result, EvalInfo &Info, const Expr *E)
static bool	EvaluateInPlace (APValue &Result, EvalInfo &Info, const LValue &This, const Expr *E, bool AllowNonLiteralTypes)
	EvaluateInPlace - Evaluate an expression in-place in an APValue. More...
static bool	EvaluateLValue (const Expr *E, LValue &Result, EvalInfo &Info, bool InvalidBaseOK)
	Evaluate an expression as an lvalue. More...
static bool	EvaluatePointer (const Expr *E, LValue &Result, EvalInfo &Info, bool InvalidBaseOK=false)
static bool	EvaluateMemberPointer (const Expr *E, MemberPtr &Result, EvalInfo &Info)
static bool	EvaluateTemporary (const Expr *E, LValue &Result, EvalInfo &Info)
	Evaluate an expression of record type as a temporary. More...
static bool	EvaluateInteger (const Expr *E, APSInt &Result, EvalInfo &Info)
static bool	EvaluateIntegerOrLValue (const Expr *E, APValue &Result, EvalInfo &Info)
	EvaluateIntegerOrLValue - Evaluate an rvalue integral-typed expression, and produce either the integer value or a pointer. More...
static bool	EvaluateFloat (const Expr *E, APFloat &Result, EvalInfo &Info)
static bool	EvaluateComplex (const Expr *E, ComplexValue &Res, EvalInfo &Info)
static bool	EvaluateAtomic (const Expr *E, const LValue *This, APValue &Result, EvalInfo &Info)
static bool	EvaluateAsRValue (EvalInfo &Info, const Expr *E, APValue &Result)
	EvaluateAsRValue - Try to evaluate this expression, performing an implicit lvalue-to-rvalue cast if it is an lvalue. More...
static bool	EvaluateBuiltinStrLen (const Expr *E, uint64_t &Result, EvalInfo &Info)
static bool	EvaluateFixedPointOrInteger (const Expr *E, APFixedPoint &Result, EvalInfo &Info)
	Evaluate an integer or fixed point expression into an APResult. More...
static bool	EvaluateFixedPoint (const Expr *E, APFixedPoint &Result, EvalInfo &Info)
	Evaluate only a fixed point expression into an APResult. More...
static void	negateAsSigned (APSInt &Int)
	Negate an APSInt in place, converting it to a signed form if necessary, and preserving its value (by extending by up to one bit as needed). More...
static bool	EvaluateIgnoredValue (EvalInfo &Info, const Expr *E)
	Evaluate an expression to see if it had side-effects, and discard its result. More...
static bool	IsNoOpCall (const CallExpr *E)
	Should this call expression be treated as a no-op? More...
static bool	IsGlobalLValue (APValue::LValueBase B)
static const ValueDecl *	GetLValueBaseDecl (const LValue &LVal)
static bool	IsLiteralLValue (const LValue &Value)
static bool	IsWeakLValue (const LValue &Value)
static bool	isZeroSized (const LValue &Value)
static bool	HasSameBase (const LValue &A, const LValue &B)
static void	NoteLValueLocation (EvalInfo &Info, APValue::LValueBase Base)
static bool	CheckEvaluationResult (CheckEvaluationResultKind CERK, EvalInfo &Info, SourceLocation DiagLoc, QualType Type, const APValue &Value, ConstantExprKind Kind, SourceLocation SubobjectLoc, CheckedTemporaries &CheckedTemps)
static bool	CheckLValueConstantExpression (EvalInfo &Info, SourceLocation Loc, QualType Type, const LValue &LVal, ConstantExprKind Kind, CheckedTemporaries &CheckedTemps)
	Check that this reference or pointer core constant expression is a valid value for an address or reference constant expression. More...
static bool	CheckMemberPointerConstantExpression (EvalInfo &Info, SourceLocation Loc, QualType Type, const APValue &Value, ConstantExprKind Kind)
	Member pointers are constant expressions unless they point to a non-virtual dllimport member function. More...
static bool	CheckLiteralType (EvalInfo &Info, const Expr *E, const LValue *This=nullptr)
	Check that this core constant expression is of literal type, and if not, produce an appropriate diagnostic. More...
static bool	CheckConstantExpression (EvalInfo &Info, SourceLocation DiagLoc, QualType Type, const APValue &Value, ConstantExprKind Kind)
	Check that this core constant expression value is a valid value for a constant expression. More...
static bool	CheckFullyInitialized (EvalInfo &Info, SourceLocation DiagLoc, QualType Type, const APValue &Value)
	Check that this evaluated value is fully-initialized and can be loaded by an lvalue-to-rvalue conversion. More...
static bool	CheckMemoryLeaks (EvalInfo &Info)
	Enforce C++2a [expr.const]/4.17, which disallows new-expressions unless "the allocated storage is deallocated within the evaluation". More...
static bool	EvalPointerValueAsBool (const APValue &Value, bool &Result)
static bool	HandleConversionToBool (const APValue &Val, bool &Result)
static bool	EvaluateAsBooleanCondition (const Expr *E, bool &Result, EvalInfo &Info)
template<typename T >
static bool	HandleOverflow (EvalInfo &Info, const Expr *E, const T &SrcValue, QualType DestType)
static bool	HandleFloatToIntCast (EvalInfo &Info, const Expr *E, QualType SrcType, const APFloat &Value, QualType DestType, APSInt &Result)
static llvm::RoundingMode	getActiveRoundingMode (EvalInfo &Info, const Expr *E)
	Get rounding mode to use in evaluation of the specified expression. More...
static bool	checkFloatingPointResult (EvalInfo &Info, const Expr *E, APFloat::opStatus St)
	Check if the given evaluation result is allowed for constant evaluation. More...
static bool	HandleFloatToFloatCast (EvalInfo &Info, const Expr *E, QualType SrcType, QualType DestType, APFloat &Result)
static APSInt	HandleIntToIntCast (EvalInfo &Info, const Expr *E, QualType DestType, QualType SrcType, const APSInt &Value)
static bool	HandleIntToFloatCast (EvalInfo &Info, const Expr *E, const FPOptions FPO, QualType SrcType, const APSInt &Value, QualType DestType, APFloat &Result)
static bool	truncateBitfieldValue (EvalInfo &Info, const Expr *E, APValue &Value, const FieldDecl *FD)
static bool	EvalAndBitcastToAPInt (EvalInfo &Info, const Expr *E, llvm::APInt &Res)
template<typename Operation >
static bool	CheckedIntArithmetic (EvalInfo &Info, const Expr *E, const APSInt &LHS, const APSInt &RHS, unsigned BitWidth, Operation Op, APSInt &Result)
	Perform the given integer operation, which is known to need at most BitWidth bits, and check for overflow in the original type (if that type was not an unsigned type). More...
static bool	handleIntIntBinOp (EvalInfo &Info, const Expr *E, const APSInt &LHS, BinaryOperatorKind Opcode, APSInt RHS, APSInt &Result)
	Perform the given binary integer operation. More...
static bool	handleFloatFloatBinOp (EvalInfo &Info, const BinaryOperator *E, APFloat &LHS, BinaryOperatorKind Opcode, const APFloat &RHS)
	Perform the given binary floating-point operation, in-place, on LHS. More...
static bool	handleLogicalOpForVector (const APInt &LHSValue, BinaryOperatorKind Opcode, const APInt &RHSValue, APInt &Result)
static bool	handleLogicalOpForVector (const APFloat &LHSValue, BinaryOperatorKind Opcode, const APFloat &RHSValue, APInt &Result)
static bool	handleLogicalOpForVector (const APValue &LHSValue, BinaryOperatorKind Opcode, const APValue &RHSValue, APInt &Result)
template<typename APTy >
static bool	handleCompareOpForVectorHelper (const APTy &LHSValue, BinaryOperatorKind Opcode, const APTy &RHSValue, APInt &Result)
static bool	handleCompareOpForVector (const APValue &LHSValue, BinaryOperatorKind Opcode, const APValue &RHSValue, APInt &Result)
static bool	handleVectorVectorBinOp (EvalInfo &Info, const BinaryOperator *E, BinaryOperatorKind Opcode, APValue &LHSValue, const APValue &RHSValue)
static bool	CastToDerivedClass (EvalInfo &Info, const Expr *E, LValue &Result, const RecordDecl *TruncatedType, unsigned TruncatedElements)
	Cast an lvalue referring to a base subobject to a derived class, by truncating the lvalue's path to the given length. More...
static bool	HandleLValueDirectBase (EvalInfo &Info, const Expr *E, LValue &Obj, const CXXRecordDecl *Derived, const CXXRecordDecl *Base, const ASTRecordLayout *RL=nullptr)
static bool	HandleLValueBase (EvalInfo &Info, const Expr *E, LValue &Obj, const CXXRecordDecl *DerivedDecl, const CXXBaseSpecifier *Base)
static bool	HandleLValueBasePath (EvalInfo &Info, const CastExpr *E, QualType Type, LValue &Result)
static bool	CastToBaseClass (EvalInfo &Info, const Expr *E, LValue &Result, const CXXRecordDecl *DerivedRD, const CXXRecordDecl *BaseRD)
	Cast an lvalue referring to a derived class to a known base subobject. More...
static bool	HandleLValueMember (EvalInfo &Info, const Expr *E, LValue &LVal, const FieldDecl *FD, const ASTRecordLayout *RL=nullptr)
	Update LVal to refer to the given field, which must be a member of the type currently described by LVal. More...
static bool	HandleLValueIndirectMember (EvalInfo &Info, const Expr *E, LValue &LVal, const IndirectFieldDecl *IFD)
	Update LVal to refer to the given indirect field. More...
static bool	HandleSizeof (EvalInfo &Info, SourceLocation Loc, QualType Type, CharUnits &Size)
	Get the size of the given type in char units. More...
static bool	HandleLValueArrayAdjustment (EvalInfo &Info, const Expr *E, LValue &LVal, QualType EltTy, APSInt Adjustment)
	Update a pointer value to model pointer arithmetic. More...
static bool	HandleLValueArrayAdjustment (EvalInfo &Info, const Expr *E, LValue &LVal, QualType EltTy, int64_t Adjustment)
static bool	HandleLValueComplexElement (EvalInfo &Info, const Expr *E, LValue &LVal, QualType EltTy, bool Imag)
	Update an lvalue to refer to a component of a complex number. More...
static bool	evaluateVarDeclInit (EvalInfo &Info, const Expr *E, const VarDecl *VD, CallStackFrame *Frame, unsigned Version, APValue *&Result)
	Try to evaluate the initializer for a variable declaration. More...
static unsigned	getBaseIndex (const CXXRecordDecl *Derived, const CXXRecordDecl *Base)
	Get the base index of the given base class within an APValue representing the given derived class. More...
static APSInt	extractStringLiteralCharacter (EvalInfo &Info, const Expr *Lit, uint64_t Index)
	Extract the value of a character from a string literal. More...
static void	expandStringLiteral (EvalInfo &Info, const StringLiteral *S, APValue &Result, QualType AllocType=QualType())
static void	expandArray (APValue &Array, unsigned Index)
static bool	isReadByLvalueToRvalueConversion (const CXXRecordDecl *RD)
	Determine whether a type would actually be read by an lvalue-to-rvalue conversion. More...
static bool	isReadByLvalueToRvalueConversion (QualType T)
static bool	diagnoseMutableFields (EvalInfo &Info, const Expr *E, AccessKinds AK, QualType T)
	Diagnose an attempt to read from any unreadable field within the specified type, which might be a class type. More...
static bool	lifetimeStartedInEvaluation (EvalInfo &Info, APValue::LValueBase Base, bool MutableSubobject=false)
static QualType	getSubobjectType (QualType ObjType, QualType SubobjType, bool IsMutable=false)
template<typename SubobjectHandler >
SubobjectHandler::result_type	findSubobject (EvalInfo &Info, const Expr *E, const CompleteObject &Obj, const SubobjectDesignator &Sub, SubobjectHandler &handler)
	Find the designated sub-object of an rvalue. More...
static bool	extractSubobject (EvalInfo &Info, const Expr *E, const CompleteObject &Obj, const SubobjectDesignator &Sub, APValue &Result, AccessKinds AK=AK_Read)
	Extract the designated sub-object of an rvalue. More...
static bool	modifySubobject (EvalInfo &Info, const Expr *E, const CompleteObject &Obj, const SubobjectDesignator &Sub, APValue &NewVal)
	Update the designated sub-object of an rvalue to the given value. More...
static unsigned	FindDesignatorMismatch (QualType ObjType, const SubobjectDesignator &A, const SubobjectDesignator &B, bool &WasArrayIndex)
	Find the position where two subobject designators diverge, or equivalently the length of the common initial subsequence. More...
static bool	AreElementsOfSameArray (QualType ObjType, const SubobjectDesignator &A, const SubobjectDesignator &B)
	Determine whether the given subobject designators refer to elements of the same array object. More...
static CompleteObject	findCompleteObject (EvalInfo &Info, const Expr *E, AccessKinds AK, const LValue &LVal, QualType LValType)
	Find the complete object to which an LValue refers. More...
static bool	handleLValueToRValueConversion (EvalInfo &Info, const Expr *Conv, QualType Type, const LValue &LVal, APValue &RVal, bool WantObjectRepresentation=false)
	Perform an lvalue-to-rvalue conversion on the given glvalue. More...
static bool	handleAssignment (EvalInfo &Info, const Expr *E, const LValue &LVal, QualType LValType, APValue &Val)
	Perform an assignment of Val to LVal. Takes ownership of Val. More...
static bool	handleCompoundAssignment (EvalInfo &Info, const CompoundAssignOperator *E, const LValue &LVal, QualType LValType, QualType PromotedLValType, BinaryOperatorKind Opcode, const APValue &RVal)
	Perform a compound assignment of LVal <op>= RVal. More...
static bool	handleIncDec (EvalInfo &Info, const Expr *E, const LValue &LVal, QualType LValType, bool IsIncrement, APValue *Old)
	Perform an increment or decrement on LVal. More...
static bool	EvaluateObjectArgument (EvalInfo &Info, const Expr *Object, LValue &This)
	Build an lvalue for the object argument of a member function call. More...
static const ValueDecl *	HandleMemberPointerAccess (EvalInfo &Info, QualType LVType, LValue &LV, const Expr *RHS, bool IncludeMember=true)
	HandleMemberPointerAccess - Evaluate a member access operation and build an lvalue referring to the result. More...
static const ValueDecl *	HandleMemberPointerAccess (EvalInfo &Info, const BinaryOperator *BO, LValue &LV, bool IncludeMember=true)
static bool	HandleBaseToDerivedCast (EvalInfo &Info, const CastExpr *E, LValue &Result)
	HandleBaseToDerivedCast - Apply the given base-to-derived cast operation on the provided lvalue, which currently refers to the base object. More...
static bool	getDefaultInitValue (QualType T, APValue &Result)
	Get the value to use for a default-initialized object of type T. More...
static bool	EvaluateVarDecl (EvalInfo &Info, const VarDecl *VD)
static bool	EvaluateDecl (EvalInfo &Info, const Decl *D)
static bool	EvaluateDependentExpr (const Expr *E, EvalInfo &Info)
static bool	EvaluateCond (EvalInfo &Info, const VarDecl *CondDecl, const Expr *Cond, bool &Result)
	Evaluate a condition (either a variable declaration or an expression). More...
static EvalStmtResult	EvaluateStmt (StmtResult &Result, EvalInfo &Info, const Stmt *S, const SwitchCase *SC=nullptr)
static EvalStmtResult	EvaluateLoopBody (StmtResult &Result, EvalInfo &Info, const Stmt *Body, const SwitchCase *Case=nullptr)
	Evaluate the body of a loop, and translate the result as appropriate. More...
static EvalStmtResult	EvaluateSwitch (StmtResult &Result, EvalInfo &Info, const SwitchStmt *SS)
	Evaluate a switch statement. More...
static bool	CheckLocalVariableDeclaration (EvalInfo &Info, const VarDecl *VD)
static bool	CheckTrivialDefaultConstructor (EvalInfo &Info, SourceLocation Loc, const CXXConstructorDecl *CD, bool IsValueInitialization)
	CheckTrivialDefaultConstructor - Check whether a constructor is a trivial default constructor. More...
static bool	CheckConstexprFunction (EvalInfo &Info, SourceLocation CallLoc, const FunctionDecl *Declaration, const FunctionDecl *Definition, const Stmt *Body)
	CheckConstexprFunction - Check that a function can be called in a constant expression. More...
static bool	checkDynamicType (EvalInfo &Info, const Expr *E, const LValue &This, AccessKinds AK, bool Polymorphic)
	Check that we can access the notional vptr of an object / determine its dynamic type. More...
static bool	checkNonVirtualMemberCallThisPointer (EvalInfo &Info, const Expr *E, const LValue &This, const CXXMethodDecl *NamedMember)
	Check that the pointee of the 'this' pointer in a member function call is either within its lifetime or in its period of construction or destruction. More...
static const CXXRecordDecl *	getBaseClassType (SubobjectDesignator &Designator, unsigned PathLength)
static Optional< DynamicType >	ComputeDynamicType (EvalInfo &Info, const Expr *E, LValue &This, AccessKinds AK)
	Determine the dynamic type of an object. More...
static const CXXMethodDecl *	HandleVirtualDispatch (EvalInfo &Info, const Expr *E, LValue &This, const CXXMethodDecl *Found, llvm::SmallVectorImpl< QualType > &CovariantAdjustmentPath)
	Perform virtual dispatch. More...
static bool	HandleCovariantReturnAdjustment (EvalInfo &Info, const Expr *E, APValue &Result, ArrayRef< QualType > Path)
	Perform the adjustment from a value returned by a virtual function to a value of the statically expected type, which may be a pointer or reference to a base class of the returned type. More...
static bool	isBaseClassPublic (const CXXRecordDecl *Derived, const CXXRecordDecl *Base)
	Determine whether Base, which is known to be a direct base class of Derived, is a public base class. More...
static bool	HandleDynamicCast (EvalInfo &Info, const ExplicitCastExpr *E, LValue &Ptr)
	Apply the given dynamic cast operation on the provided lvalue. More...
static bool	HandleUnionActiveMemberChange (EvalInfo &Info, const Expr *LHSExpr, const LValue &LHS)
	Handle a builtin simple-assignment or a call to a trivial assignment operator whose left-hand side might involve a union member access. More...
static bool	EvaluateCallArg (const ParmVarDecl *PVD, const Expr *Arg, CallRef Call, EvalInfo &Info, bool NonNull=false)
static bool	EvaluateArgs (ArrayRef< const Expr * > Args, CallRef Call, EvalInfo &Info, const FunctionDecl *Callee, bool RightToLeft=false)
	Evaluate the arguments to a function call. More...
static bool	handleTrivialCopy (EvalInfo &Info, const ParmVarDecl *Param, const Expr *E, APValue &Result, bool CopyObjectRepresentation)
	Perform a trivial copy from Param, which is the parameter of a copy or move constructor or assignment operator. More...
static bool	HandleFunctionCall (SourceLocation CallLoc, const FunctionDecl *Callee, const LValue *This, ArrayRef< const Expr * > Args, CallRef Call, const Stmt *Body, EvalInfo &Info, APValue &Result, const LValue *ResultSlot)
	Evaluate a function call. More...
static bool	HandleConstructorCall (const Expr *E, const LValue &This, CallRef Call, const CXXConstructorDecl *Definition, EvalInfo &Info, APValue &Result)
	Evaluate a constructor call. More...
static bool	HandleConstructorCall (const Expr *E, const LValue &This, ArrayRef< const Expr * > Args, const CXXConstructorDecl *Definition, EvalInfo &Info, APValue &Result)
static bool	HandleDestructionImpl (EvalInfo &Info, SourceLocation CallLoc, const LValue &This, APValue &Value, QualType T)
static bool	HandleOperatorNewCall (EvalInfo &Info, const CallExpr *E, LValue &Result)
	Perform a call to 'perator new' or to ‘__builtin_operator_new’. More...
static bool	hasVirtualDestructor (QualType T)
static const FunctionDecl *	getVirtualOperatorDelete (QualType T)
static Optional< DynAlloc * >	CheckDeleteKind (EvalInfo &Info, const Expr *E, const LValue &Pointer, DynAlloc::Kind DeallocKind)
	Check that the given object is a suitable pointer to a heap allocation that still exists and is of the right kind for the purpose of a deletion. More...
bool	HandleOperatorDeleteCall (EvalInfo &Info, const CallExpr *E)
static bool	getBytesReturnedByAllocSizeCall (const ASTContext &Ctx, const CallExpr *Call, llvm::APInt &Result)
	Attempts to compute the number of bytes available at the pointer returned by a function with the alloc_size attribute. More...
static bool	getBytesReturnedByAllocSizeCall (const ASTContext &Ctx, const LValue &LVal, llvm::APInt &Result)
	Convenience function. More...
static bool	evaluateLValueAsAllocSize (EvalInfo &Info, APValue::LValueBase Base, LValue &Result)
	Attempts to evaluate the given LValueBase as the result of a call to a function with the alloc_size attribute. More...
static bool	IsDeclSourceLocationCurrent (const FunctionDecl *FD)
static CharUnits	GetAlignOfType (EvalInfo &Info, QualType T, UnaryExprOrTypeTrait ExprKind)
static CharUnits	GetAlignOfExpr (EvalInfo &Info, const Expr *E, UnaryExprOrTypeTrait ExprKind)
static CharUnits	getBaseAlignment (EvalInfo &Info, const LValue &Value)
static bool	getAlignmentArgument (const Expr *E, QualType ForType, EvalInfo &Info, APSInt &Alignment)
	Evaluate the value of the alignment argument to __builtin_align_{up,down}, __builtin_is_aligned and __builtin_assume_aligned. More...
static bool	isOneByteCharacterType (QualType T)
static bool	EvaluateArrayNewInitList (EvalInfo &Info, LValue &This, APValue &Result, const InitListExpr *ILE, QualType AllocType)
static bool	EvaluateArrayNewConstructExpr (EvalInfo &Info, LValue &This, APValue &Result, const CXXConstructExpr *CCE, QualType AllocType)
static bool	HandleClassZeroInitialization (EvalInfo &Info, const Expr *E, const RecordDecl *RD, const LValue &This, APValue &Result)
	Perform zero-initialization on an object of non-union class type. More...
static bool	EvaluateRecord (const Expr *E, const LValue &This, APValue &Result, EvalInfo &Info)
static bool	EvaluateVector (const Expr *E, APValue &Result, EvalInfo &Info)
static llvm::Optional< APValue >	handleVectorUnaryOperator (ASTContext &Ctx, QualType ResultTy, UnaryOperatorKind Op, APValue Elt)
static bool	EvaluateArray (const Expr *E, const LValue &This, APValue &Result, EvalInfo &Info)
static bool	MaybeElementDependentArrayFiller (const Expr *FillerExpr)
static GCCTypeClass	EvaluateBuiltinClassifyType (QualType T, const LangOptions &LangOpts)
	EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way as GCC. More...
static GCCTypeClass	EvaluateBuiltinClassifyType (const CallExpr *E, const LangOptions &LangOpts)
	EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way as GCC. More...
static bool	EvaluateBuiltinConstantPForLValue (const APValue &LV)
	EvaluateBuiltinConstantPForLValue - Determine the result of __builtin_constant_p when applied to the given pointer. More...
static bool	EvaluateBuiltinConstantP (EvalInfo &Info, const Expr *Arg)
	EvaluateBuiltinConstantP - Evaluate __builtin_constant_p as similarly to GCC as we can manage. More...
static QualType	getObjectType (APValue::LValueBase B)
	Retrieves the "underlying object type" of the given expression, as used by __builtin_object_size. More...
static const Expr *	ignorePointerCastsAndParens (const Expr *E)
	A more selective version of E->IgnoreParenCasts for tryEvaluateBuiltinObjectSize. More...
static bool	isDesignatorAtObjectEnd (const ASTContext &Ctx, const LValue &LVal)
	Checks to see if the given LValue's Designator is at the end of the LValue's record layout. More...
static bool	refersToCompleteObject (const LValue &LVal)
	Tests to see if the LValue has a user-specified designator (that isn't necessarily valid). More...
static bool	isUserWritingOffTheEnd (const ASTContext &Ctx, const LValue &LVal)
	Attempts to detect a user writing into a piece of memory that's impossible to figure out the size of by just using types. More...
static bool	convertUnsignedAPIntToCharUnits (const llvm::APInt &Int, CharUnits &Result)
	Converts the given APInt to CharUnits, assuming the APInt is unsigned. More...
static bool	determineEndOffset (EvalInfo &Info, SourceLocation ExprLoc, unsigned Type, const LValue &LVal, CharUnits &EndOffset)
	Helper for tryEvaluateBuiltinObjectSize – Given an LValue, this will determine how many bytes exist from the beginning of the object to either the end of the current subobject, or the end of the object itself, depending on what the LValue looks like + the value of Type. More...
static bool	tryEvaluateBuiltinObjectSize (const Expr *E, unsigned Type, EvalInfo &Info, uint64_t &Size)
	Tries to evaluate the __builtin_object_size for E. More...
static bool	getBuiltinAlignArguments (const CallExpr *E, EvalInfo &Info, APValue &Val, APSInt &Alignment)
static bool	isOnePastTheEndOfCompleteObject (const ASTContext &Ctx, const LValue &LV)
	Determine whether this is a pointer past the end of the complete object referred to by the lvalue. More...
static void	addOrSubLValueAsInteger (APValue &LVal, const APSInt &Index, bool IsSub)
template<class SuccessCB , class AfterCB >
static bool	EvaluateComparisonBinaryOperator (EvalInfo &Info, const BinaryOperator *E, SuccessCB &&Success, AfterCB &&DoAfter)
static bool	TryEvaluateBuiltinNaN (const ASTContext &Context, QualType ResultTy, const Expr *Arg, bool SNaN, llvm::APFloat &Result)
static bool	EvaluateVoid (const Expr *E, EvalInfo &Info)
static bool	FastEvaluateAsRValue (const Expr *Exp, Expr::EvalResult &Result, const ASTContext &Ctx, bool &IsConst)
static bool	hasUnacceptableSideEffect (Expr::EvalStatus &Result, Expr::SideEffectsKind SEK)
static bool	EvaluateAsRValue (const Expr *E, Expr::EvalResult &Result, const ASTContext &Ctx, EvalInfo &Info)
static bool	EvaluateAsInt (const Expr *E, Expr::EvalResult &ExprResult, const ASTContext &Ctx, Expr::SideEffectsKind AllowSideEffects, EvalInfo &Info)
static bool	EvaluateAsFixedPoint (const Expr *E, Expr::EvalResult &ExprResult, const ASTContext &Ctx, Expr::SideEffectsKind AllowSideEffects, EvalInfo &Info)
static bool	EvaluateDestruction (const ASTContext &Ctx, APValue::LValueBase Base, APValue DestroyedValue, QualType Type, SourceLocation Loc, Expr::EvalStatus &EStatus, bool IsConstantDestruction)
static ICEDiag	NoDiag ()
static ICEDiag	Worst (ICEDiag A, ICEDiag B)
static ICEDiag	CheckEvalInICE (const Expr *E, const ASTContext &Ctx)
static ICEDiag	CheckICE (const Expr *E, const ASTContext &Ctx)
static bool	EvaluateCPlusPlus11IntegralConstantExpr (const ASTContext &Ctx, const Expr *E, llvm::APSInt *Value, SourceLocation *Loc)
	Evaluate an expression as a C++11 integral constant expression. More...

Macro Definition Documentation

ABSTRACT_STMT

#define ABSTRACT_STMT

(

Node

)

ABSTRACT_TYPE

#define ABSTRACT_TYPE	(		Class,
			Base
	)

BUILTIN_TYPE

#define BUILTIN_TYPE	(		ID,
			SINGLETON_ID
	)

DEBUG_TYPE

#define DEBUG_TYPE   "exprconstant"

Definition at line 64 of file ExprConstant.cpp.

DEPENDENT_TYPE [1/2]

#define DEPENDENT_TYPE	(		Class,
			Base
	)

Value:

  case Type::Class:                                                            \
    llvm_unreachable(                                                          \
        "dependent types aren't supported in the constant evaluator!");

DEPENDENT_TYPE [2/2]

#define DEPENDENT_TYPE	(		ID,
			BASE
	)		case Type::ID:

EXPR

#define EXPR	(		Node,
			Base
	)

EXT_OPAQUE_TYPE

#define EXT_OPAQUE_TYPE	(		ExtType,
			Id,
			Ext
	)		case BuiltinType::Id:

FLOATING_TYPE

#define FLOATING_TYPE	(		ID,
			SINGLETON_ID
	)		case BuiltinType::ID: return GCCTypeClass::RealFloat;

IMAGE_TYPE

#define IMAGE_TYPE	(		ImgType,
			Id,
			SingletonId,
			Access,
			Suffix
	)		case BuiltinType::Id:

NON_CANONICAL_TYPE [1/2]

#define NON_CANONICAL_TYPE	(		Class,
			Base
	)

Value:

  case Type::Class:                                                            \
    llvm_unreachable("non-canonical type should be impossible!");

NON_CANONICAL_TYPE [2/2]

#define NON_CANONICAL_TYPE	(		ID,
			BASE
	)		case Type::ID:

NON_CANONICAL_UNLESS_DEPENDENT

#define NON_CANONICAL_UNLESS_DEPENDENT	(		Class,
			Base
	)

Value:

  case Type::Class:                                                            \
    llvm_unreachable("either dependent or not canonical!");

NON_CANONICAL_UNLESS_DEPENDENT_TYPE

#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE	(		ID,
			BASE
	)		case Type::ID:

PLACEHOLDER_TYPE

#define PLACEHOLDER_TYPE	(		ID,
			SINGLETON_ID
	)		case BuiltinType::ID: break;

PPC_VECTOR_TYPE

#define PPC_VECTOR_TYPE	(		Name,
			Id,
			Size
	)		case BuiltinType::Id:

RVV_TYPE

#define RVV_TYPE	(		Name,
			Id,
			SingletonId
	)		case BuiltinType::Id:

SIGNED_TYPE

#define SIGNED_TYPE	(		ID,
			SINGLETON_ID
	)		case BuiltinType::ID: return GCCTypeClass::Integer;

STMT

#define STMT	(		Node,
			Base
	)		case Expr::Node##Class:

SVE_TYPE

#define SVE_TYPE	(		Name,
			Id,
			SingletonId
	)		case BuiltinType::Id:

TYPE [1/2]

#define TYPE	(		Class,
			Base
	)

Value:

  case Type::Class:                                                            \
    return visit(cast<Class##Type>(Can.getTypePtr()), Offset);

TYPE [2/2]

#define TYPE	(		ID,
			BASE
	)

Typedef Documentation

CheckedTemporaries

using CheckedTemporaries = llvm::SmallPtrSet<const MaterializeTemporaryExpr *, 8>

Materialized temporaries that we've already checked to determine if they're initializsed by a constant expression.

Definition at line 2127 of file ExprConstant.cpp.

Enumeration Type Documentation

CheckEvaluationResultKind

enum CheckEvaluationResultKind

strong

Enumerator
ConstantExpression
FullyInitialized

Definition at line 2119 of file ExprConstant.cpp.

GCCTypeClass

enum GCCTypeClass

strong

Values returned by __builtin_classify_type, chosen to match the values produced by GCC's builtin.

Enumerator
None
Void
Integer
Enum
Bool
Pointer
PointerToDataMember
RealFloat
Complex
PointerToMemberFunction
ClassOrStruct
Union

Definition at line 11210 of file ExprConstant.cpp.

Function Documentation

addOrSubLValueAsInteger()

static void addOrSubLValueAsInteger ( APValue &  LVal, const APSInt &  Index, bool  IsSub  )

static

Definition at line 12633 of file ExprConstant.cpp.

AreElementsOfSameArray()

static bool AreElementsOfSameArray ( QualType  ObjType, const SubobjectDesignator &  A, const SubobjectDesignator &  B  )

static

Determine whether the given subobject designators refer to elements of the same array object.

Definition at line 3947 of file ExprConstant.cpp.

References FindDesignatorMismatch().

CastToBaseClass()

static bool CastToBaseClass ( EvalInfo &  Info, const Expr *  E, LValue &  Result, const CXXRecordDecl *  DerivedRD, const CXXRecordDecl *  BaseRD  )

static

Cast an lvalue referring to a derived class to a known base subobject.

Definition at line 3129 of file ExprConstant.cpp.

Referenced by HandleCovariantReturnAdjustment().

CastToDerivedClass()

static bool CastToDerivedClass ( EvalInfo &  Info, const Expr *  E, LValue &  Result, const RecordDecl *  TruncatedType, unsigned  TruncatedElements  )

static

Cast an lvalue referring to a base subobject to a derived class, by truncating the lvalue's path to the given length.

Definition at line 3047 of file ExprConstant.cpp.

References clang::CSK_Derived, clang::ASTRecordLayout::getBaseClassOffset(), clang::ASTRecordLayout::getVBaseClassOffset(), and clang::Decl::isInvalidDecl().

Referenced by HandleBaseToDerivedCast(), HandleDynamicCast(), HandleLValueBase(), and HandleMemberPointerAccess().

CheckConstantExpression()

static bool CheckConstantExpression ( EvalInfo &  Info, SourceLocation  DiagLoc, QualType  Type, const APValue &  Value, ConstantExprKind  Kind  )

static

Check that this core constant expression value is a valid value for a constant expression.

If not, report an appropriate diagnostic. Does not check that the expression is of literal type.

Definition at line 2444 of file ExprConstant.cpp.

References CheckEvaluationResult(), ConstantExpression, and clang::Type::isVoidType().

Referenced by EvaluateAsRValue().

CheckConstexprFunction()

static bool CheckConstexprFunction ( EvalInfo &  Info, SourceLocation  CallLoc, const FunctionDecl *  Declaration, const FunctionDecl *  Definition, const Stmt *  Body  )

static

CheckConstexprFunction - Check that a function can be called in a constant expression.

Definition at line 5533 of file ExprConstant.cpp.

References bool, clang::Decl::getLocation(), and clang::FunctionDecl::isConstexpr().

Referenced by HandleDestructionImpl().

CheckDeleteKind()

static Optional<DynAlloc *> CheckDeleteKind ( EvalInfo &  Info, const Expr *  E, const LValue &  Pointer, DynAlloc::Kind  DeallocKind  )

static

Check that the given object is a suitable pointer to a heap allocation that still exists and is of the right kind for the purpose of a deletion.

On success, returns the heap allocation to deallocate. On failure, produces a diagnostic and returns None.

Definition at line 6741 of file ExprConstant.cpp.

References NoteLValueLocation().

Referenced by HandleOperatorDeleteCall().

checkDynamicType()

static bool checkDynamicType ( EvalInfo &  Info, const Expr *  E, const LValue &  This, AccessKinds  AK, bool  Polymorphic  )

static

Check that we can access the notional vptr of an object / determine its dynamic type.

Definition at line 5608 of file ExprConstant.cpp.

References findCompleteObject(), findSubobject(), clang::APValue::getAsString(), and clang::interp::This().

Referenced by checkNonVirtualMemberCallThisPointer(), and ComputeDynamicType().

CheckedIntArithmetic()

template<typename Operation >

static bool CheckedIntArithmetic ( EvalInfo &  Info, const Expr *  E, const APSInt &  LHS, const APSInt &  RHS, unsigned  BitWidth, Operation  Op, APSInt &  Result  )

static

Perform the given integer operation, which is known to need at most BitWidth bits, and check for overflow in the original type (if that type was not an unsigned type).

Definition at line 2728 of file ExprConstant.cpp.

References clang::Expr::getExprLoc(), clang::Expr::getType(), HandleOverflow(), and clang::threadSafety::sx::toString().

Referenced by handleIntIntBinOp().

CheckEvalInICE()

static ICEDiag CheckEvalInICE ( const Expr *  E, const ASTContext &  Ctx  )

static

Definition at line 15490 of file ExprConstant.cpp.

Referenced by CheckICE().

CheckEvaluationResult()

static bool CheckEvaluationResult ( CheckEvaluationResultKind  CERK, EvalInfo &  Info, SourceLocation  DiagLoc, QualType  Type, const APValue &  Value, ConstantExprKind  Kind, SourceLocation  SubobjectLoc, CheckedTemporaries &  CheckedTemps  )

static

Definition at line 2360 of file ExprConstant.cpp.

References clang::Type::castAs(), clang::Type::castAsArrayTypeUnsafe(), CheckLValueConstantExpression(), CheckMemberPointerConstantExpression(), ConstantExpression, clang::RecordDecl::fields(), clang::Type::getAs(), clang::ArrayType::getElementType(), and clang::SourceLocation::isValid().

Referenced by CheckConstantExpression(), CheckFullyInitialized(), and CheckLValueConstantExpression().

checkFloatingPointResult()

static bool checkFloatingPointResult ( EvalInfo &  Info, const Expr *  E, APFloat::opStatus  St  )

static

Check if the given evaluation result is allowed for constant evaluation.

Definition at line 2581 of file ExprConstant.cpp.

References clang::FPOptions::getExceptionMode(), clang::Expr::getFPFeaturesInEffect(), and clang::FPOptions::getRoundingMode().

Referenced by handleFloatFloatBinOp(), HandleFloatToFloatCast(), and HandleIntToFloatCast().

CheckFullyInitialized()

static bool CheckFullyInitialized ( EvalInfo &  Info, SourceLocation  DiagLoc, QualType  Type, const APValue &  Value  )

static

Check that this evaluated value is fully-initialized and can be loaded by an lvalue-to-rvalue conversion.

Definition at line 2459 of file ExprConstant.cpp.

References CheckEvaluationResult(), and FullyInitialized.

CheckICE()

static ICEDiag CheckICE ( const Expr *  E, const ASTContext &  Ctx  )

static

Definition at line 15503 of file ExprConstant.cpp.

References CheckEvalInICE(), clang::Expr::EvaluateKnownConstInt(), clang::Stmt::getBeginLoc(), clang::CallExpr::getBuiltinCallee(), clang::BinaryConditionalOperator::getCommon(), clang::ConditionalOperator::getCond(), clang::ConditionalOperator::getFalseExpr(), clang::BinaryConditionalOperator::getFalseExpr(), clang::ASTContext::getIntWidth(), clang::UnaryExprOrTypeTraitExpr::getKind(), clang::ASTContext::getLangOpts(), clang::BinaryOperator::getLHS(), clang::UnaryOperator::getOpcode(), clang::BinaryOperator::getOpcode(), clang::BinaryOperator::getRHS(), clang::Stmt::getStmtClass(), clang::UnaryOperator::getSubExpr(), clang::ConditionalOperator::getTrueExpr(), clang::Expr::getType(), clang::ValueDecl::getType(), clang::UnaryExprOrTypeTraitExpr::getTypeOfArgument(), clang::Expr::IgnoreParenCasts(), clang::Expr::IgnoreParenImpCasts(), clang::Type::isIntegralOrEnumerationType(), clang::Expr::isPRValue(), clang::Type::isReferenceType(), clang::Type::isSignedIntegerOrEnumerationType(), clang::VarDecl::isUsableInConstantExpressions(), clang::Expr::isValueDependent(), clang::Type::isVariableArrayType(), NoDiag(), and Worst().

Referenced by clang::Expr::isCXX98IntegralConstantExpr(), and clang::Expr::isIntegerConstantExpr().

CheckLiteralType()

static bool CheckLiteralType ( EvalInfo &  Info, const Expr *  E, const LValue *  This = nullptr  )

static

Check that this core constant expression is of literal type, and if not, produce an appropriate diagnostic.

Definition at line 2330 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isLiteralType(), clang::Expr::isPRValue(), and clang::interp::This().

Referenced by EvaluateAsRValue(), and EvaluateInPlace().

CheckLocalVariableDeclaration()

static bool CheckLocalVariableDeclaration ( EvalInfo &  Info, const VarDecl *  VD  )

static

Definition at line 5049 of file ExprConstant.cpp.

References clang::Decl::getLocation(), clang::VarDecl::getTSCSpec(), clang::VarDecl::isLocalVarDecl(), clang::VarDecl::isStaticLocal(), and clang::TSCS_unspecified.

CheckLValueConstantExpression()

static bool CheckLValueConstantExpression ( EvalInfo &  Info, SourceLocation  Loc, QualType  Type, const LValue &  LVal, ConstantExprKind  Kind, CheckedTemporaries &  CheckedTemps  )

static

Check that this reference or pointer core constant expression is a valid value for an address or reference constant expression.

Return true if we can fold this expression, whether or not it's a constant expression.

Definition at line 2139 of file ExprConstant.cpp.

References CheckEvaluationResult(), ConstantExpression, clang::Type::isAnyPointerType(), clang::QualType::isDestructedType(), IsGlobalLValue(), clang::Type::isReferenceType(), NoteLValueLocation(), and V.

Referenced by CheckEvaluationResult(), and clang::Expr::EvaluateAsLValue().

CheckMemberPointerConstantExpression()

static bool CheckMemberPointerConstantExpression ( EvalInfo &  Info, SourceLocation  Loc, QualType  Type, const APValue &  Value, ConstantExprKind  Kind  )

static

Member pointers are constant expressions unless they point to a non-virtual dllimport member function.

Definition at line 2310 of file ExprConstant.cpp.

References clang::Member.

Referenced by CheckEvaluationResult().

CheckMemoryLeaks()

static bool CheckMemoryLeaks ( EvalInfo &  Info )

static

Enforce C++2a [expr.const]/4.17, which disallows new-expressions unless "the allocated storage is deallocated within the evaluation".

Definition at line 2469 of file ExprConstant.cpp.

Referenced by EvaluateAsRValue().

checkNonVirtualMemberCallThisPointer()

static bool checkNonVirtualMemberCallThisPointer ( EvalInfo &  Info, const Expr *  E, const LValue &  This, const CXXMethodDecl *  NamedMember  )

static

Check that the pointee of the 'this' pointer in a member function call is either within its lifetime or in its period of construction or destruction.

Definition at line 5650 of file ExprConstant.cpp.

References clang::AK_Destroy, clang::AK_MemberCall, checkDynamicType(), and clang::interp::This().

CheckTrivialDefaultConstructor()

static bool CheckTrivialDefaultConstructor ( EvalInfo &  Info, SourceLocation  Loc, const CXXConstructorDecl *  CD, bool  IsValueInitialization  )

static

CheckTrivialDefaultConstructor - Check whether a constructor is a trivial default constructor.

If so, we'll fold it whether or not it's marked as constexpr. If it is marked as constexpr, we will never implicitly define it, so we need special handling.

Definition at line 5508 of file ExprConstant.cpp.

References clang::Decl::getLocation(), clang::FunctionDecl::isConstexpr(), clang::CXXConstructorDecl::isDefaultConstructor(), and clang::FunctionDecl::isTrivial().

ComputeDynamicType()

static Optional<DynamicType> ComputeDynamicType ( EvalInfo &  Info, const Expr *  E, LValue &  This, AccessKinds  AK  )

static

Determine the dynamic type of an object.

Definition at line 5675 of file ExprConstant.cpp.

References checkDynamicType(), getBaseClassType(), and clang::interp::This().

Referenced by HandleDynamicCast(), and HandleVirtualDispatch().

convertUnsignedAPIntToCharUnits()

static bool convertUnsignedAPIntToCharUnits ( const llvm::APInt &  Int, CharUnits &  Result  )

static

Converts the given APInt to CharUnits, assuming the APInt is unsigned.

Fails if the conversion would cause loss of precision.

Definition at line 11663 of file ExprConstant.cpp.

References max().

Referenced by determineEndOffset().

determineEndOffset()

static bool determineEndOffset ( EvalInfo &  Info, SourceLocation  ExprLoc, unsigned  Type, const LValue &  LVal, CharUnits &  EndOffset  )

static

Helper for tryEvaluateBuiltinObjectSize – Given an LValue, this will determine how many bytes exist from the beginning of the object to either the end of the current subobject, or the end of the object itself, depending on what the LValue looks like + the value of Type.

If this returns false, the value of Result is undefined.

Definition at line 11678 of file ExprConstant.cpp.

References convertUnsignedAPIntToCharUnits(), getBytesReturnedByAllocSizeCall(), getObjectType(), HandleSizeof(), clang::Type::isFunctionType(), clang::Type::isIncompleteType(), clang::QualType::isNull(), isUserWritingOffTheEnd(), and refersToCompleteObject().

Referenced by tryEvaluateBuiltinObjectSize().

diagnoseMutableFields()

static bool diagnoseMutableFields ( EvalInfo &  Info, const Expr *  E, AccessKinds  AK, QualType  T  )

static

Diagnose an attempt to read from any unreadable field within the specified type, which might be a class type.

Definition at line 3493 of file ExprConstant.cpp.

References clang::CXXRecordDecl::bases(), clang::RecordDecl::fields(), clang::Type::getAsCXXRecordDecl(), clang::Type::getBaseElementTypeUnsafe(), clang::Expr::getType(), clang::CXXRecordDecl::hasMutableFields(), isReadByLvalueToRvalueConversion(), and clang::TagDecl::isUnion().

Referenced by findSubobject().

EvalAndBitcastToAPInt()

static bool EvalAndBitcastToAPInt ( EvalInfo &  Info, const Expr *  E, llvm::APInt &  Res  )

static

Definition at line 2677 of file ExprConstant.cpp.

References clang::Type::castAs(), Evaluate(), clang::APValue::getFloat(), clang::APValue::getInt(), clang::Expr::getType(), clang::APValue::getVectorElt(), clang::APValue::getVectorLength(), clang::APValue::isFloat(), clang::APValue::isInt(), and clang::APValue::isVector().

EvalPointerValueAsBool()

static bool EvalPointerValueAsBool ( const APValue &  Value, bool &  Result  )

static

Definition at line 2481 of file ExprConstant.cpp.

Referenced by HandleConversionToBool().

Evaluate()

static bool Evaluate ( APValue &  Result, EvalInfo &  Info, const Expr *  E  )

static

Definition at line 14899 of file ExprConstant.cpp.

References EvaluateArray(), EvaluateAtomic(), EvaluateComplex(), EvaluateFloat(), EvaluateLValue(), EvaluateMemberPointer(), EvaluatePointer(), EvaluateRecord(), EvaluateVector(), EvaluateVoid(), clang::QualType::getAtomicUnqualifiedType(), clang::Expr::getType(), clang::Type::hasPointerRepresentation(), clang::Type::isAnyComplexType(), clang::Type::isArrayType(), clang::Type::isAtomicType(), clang::Type::isFixedPointType(), clang::Type::isFunctionType(), clang::Expr::isGLValue(), clang::Type::isIntegralOrEnumerationType(), clang::Type::isMemberPointerType(), clang::Type::isRealFloatingType(), clang::Type::isRecordType(), clang::Expr::isValueDependent(), clang::Type::isVectorType(), clang::Type::isVoidType(), and P.

Referenced by EvalAndBitcastToAPInt(), EvaluateAsBooleanCondition(), EvaluateAsRValue(), EvaluateIgnoredValue(), EvaluateInPlace(), and handleLValueToRValueConversion().

EvaluateArgs()

static bool EvaluateArgs ( ArrayRef< const Expr * >  Args, CallRef  Call, EvalInfo &  Info, const FunctionDecl *  Callee, bool  RightToLeft = false  )

static

Evaluate the arguments to a function call.

Definition at line 6106 of file ExprConstant.cpp.

References EvaluateCallArg(), and clang::NonNull.

Referenced by HandleConstructorCall().

EvaluateArray()

static bool EvaluateArray ( const Expr *  E, const LValue &  This, APValue &  Result, EvalInfo &  Info  )

static

Definition at line 10677 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isArrayType(), clang::Expr::isPRValue(), clang::Expr::isValueDependent(), and clang::interp::This().

Referenced by Evaluate(), and EvaluateInPlace().

EvaluateArrayNewConstructExpr()

static bool EvaluateArrayNewConstructExpr ( EvalInfo &  Info, LValue &  This, APValue &  Result, const CXXConstructExpr *  CCE, QualType  AllocType  )

static

Definition at line 10695 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isArrayType(), clang::Expr::isPRValue(), clang::Expr::isValueDependent(), and clang::interp::This().

EvaluateArrayNewInitList()

static bool EvaluateArrayNewInitList ( EvalInfo &  Info, LValue &  This, APValue &  Result, const InitListExpr *  ILE, QualType  AllocType  )

static

Definition at line 10685 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isArrayType(), clang::Expr::isPRValue(), clang::Expr::isValueDependent(), and clang::interp::This().

EvaluateAsBooleanCondition()

static bool EvaluateAsBooleanCondition ( const Expr *  E, bool &  Result, EvalInfo &  Info  )

static

Definition at line 2534 of file ExprConstant.cpp.

References Evaluate(), HandleConversionToBool(), clang::Expr::isPRValue(), and clang::Expr::isValueDependent().

Referenced by clang::Sema::diagnoseArgIndependentDiagnoseIfAttrs(), and EvaluateCond().

EvaluateAsFixedPoint()

static bool EvaluateAsFixedPoint ( const Expr *  E, Expr::EvalResult &  ExprResult, const ASTContext &  Ctx, Expr::SideEffectsKind  AllowSideEffects, EvalInfo &  Info  )

static

Definition at line 15110 of file ExprConstant.cpp.

References EvaluateAsRValue(), clang::Expr::getType(), hasUnacceptableSideEffect(), clang::Type::isFixedPointType(), and clang::Expr::isValueDependent().

Referenced by clang::Expr::EvaluateAsFixedPoint().

EvaluateAsInt()

static bool EvaluateAsInt ( const Expr *  E, Expr::EvalResult &  ExprResult, const ASTContext &  Ctx, Expr::SideEffectsKind  AllowSideEffects, EvalInfo &  Info  )

static

Definition at line 15094 of file ExprConstant.cpp.

References EvaluateAsRValue(), clang::Expr::getType(), hasUnacceptableSideEffect(), clang::Type::isIntegralOrEnumerationType(), and clang::Expr::isValueDependent().

Referenced by clang::Expr::EvaluateAsInt().

EvaluateAsRValue() [1/2]

static bool EvaluateAsRValue ( const Expr *  E, Expr::EvalResult &  Result, const ASTContext &  Ctx, EvalInfo &  Info  )

static

Definition at line 15084 of file ExprConstant.cpp.

References EvaluateAsRValue(), FastEvaluateAsRValue(), and clang::Expr::isValueDependent().

EvaluateAsRValue() [2/2]

static bool EvaluateAsRValue ( EvalInfo &  Info, const Expr *  E, APValue &  Result  )

static

EvaluateAsRValue - Try to evaluate this expression, performing an implicit lvalue-to-rvalue cast if it is an lvalue.

Definition at line 15012 of file ExprConstant.cpp.

References CheckConstantExpression(), CheckLiteralType(), CheckMemoryLeaks(), Evaluate(), clang::Expr::getExprLoc(), clang::Expr::getType(), handleLValueToRValueConversion(), clang::Expr::isGLValue(), clang::QualType::isNull(), and clang::Expr::isValueDependent().

Referenced by clang::Expr::EvaluateAsBooleanCondition(), EvaluateAsFixedPoint(), clang::Expr::EvaluateAsFloat(), EvaluateAsInt(), clang::Expr::EvaluateAsRValue(), EvaluateAsRValue(), EvaluateBuiltinConstantP(), clang::Expr::EvaluateForOverflow(), clang::Expr::EvaluateKnownConstInt(), clang::Expr::EvaluateKnownConstIntCheckOverflow(), clang::Expr::isEvaluatable(), and tryEvaluateBuiltinObjectSize().

EvaluateAtomic()

static bool EvaluateAtomic ( const Expr *  E, const LValue *  This, APValue &  Result, EvalInfo &  Info  )

static

Definition at line 14762 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isAtomicType(), clang::Expr::isPRValue(), clang::Expr::isValueDependent(), and clang::interp::This().

Referenced by Evaluate(), and EvaluateInPlace().

EvaluateBuiltinClassifyType() [1/2]

static GCCTypeClass EvaluateBuiltinClassifyType ( const CallExpr *  E, const LangOptions &  LangOpts  )

static

EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way as GCC.

Definition at line 11383 of file ExprConstant.cpp.

EvaluateBuiltinClassifyType() [2/2]

static GCCTypeClass EvaluateBuiltinClassifyType ( QualType  T, const LangOptions &  LangOpts  )

static

EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way as GCC.

Definition at line 11241 of file ExprConstant.cpp.

EvaluateBuiltinConstantP()

static bool EvaluateBuiltinConstantP ( EvalInfo &  Info, const Expr *  Arg  )

static

EvaluateBuiltinConstantP - Evaluate __builtin_constant_p as similarly to GCC as we can manage.

Definition at line 11421 of file ExprConstant.cpp.

References EvaluateAsRValue(), EvaluateBuiltinConstantPForLValue(), clang::Expr::getType(), clang::Type::isAnyComplexType(), clang::Type::isFloatingType(), clang::Type::isIntegralOrEnumerationType(), clang::Type::isNullPtrType(), clang::Type::isPointerType(), and V.

EvaluateBuiltinConstantPForLValue()

static bool EvaluateBuiltinConstantPForLValue ( const APValue &  LV )

static

EvaluateBuiltinConstantPForLValue - Determine the result of __builtin_constant_p when applied to the given pointer.

A pointer is only "constant" if it is null (or a pointer cast to integer) or it points to the first character of a string literal.

Definition at line 11400 of file ExprConstant.cpp.

References clang::APValue::getLValueBase(), clang::APValue::getLValueOffset(), and clang::CharUnits::isZero().

Referenced by EvaluateBuiltinConstantP().

EvaluateBuiltinStrLen()

static bool EvaluateBuiltinStrLen ( const Expr *  E, uint64_t &  Result, EvalInfo &  Info  )

static

Definition at line 16172 of file ExprConstant.cpp.

References EvaluatePointer(), clang::Type::getPointeeType(), clang::Expr::getType(), clang::Type::hasPointerRepresentation(), and clang::Expr::isPRValue().

EvaluateCallArg()

static bool EvaluateCallArg ( const ParmVarDecl *  PVD, const Expr *  Arg, CallRef  Call, EvalInfo &  Info, bool  NonNull = false  )

static

Definition at line 6080 of file ExprConstant.cpp.

References clang::interp::Call(), EvaluateInPlace(), clang::Expr::getType(), clang::NonNull, and V.

Referenced by EvaluateArgs().

EvaluateComparisonBinaryOperator()

template<class SuccessCB , class AfterCB >

static bool EvaluateComparisonBinaryOperator ( EvalInfo &  Info, const BinaryOperator *  E, SuccessCB &&  Success, AfterCB &&  DoAfter  )

static

Definition at line 12798 of file ExprConstant.cpp.

References clang::Equal, EvaluateComplex(), EvaluateFixedPointOrInteger(), EvaluateFloat(), EvaluateInteger(), EvaluateLValue(), EvaluateMemberPointer(), EvaluatePointer(), FindDesignatorMismatch(), clang::Decl::getAccess(), clang::BinaryOperator::getFPFeaturesInEffect(), clang::BinaryOperator::getLHS(), clang::BinaryOperator::getOpcode(), clang::FieldDecl::getParent(), clang::CharUnits::getQuantity(), clang::BinaryOperator::getRHS(), clang::Expr::getType(), HasSameBase(), clang::Type::isAnyComplexType(), clang::BinaryOperator::isAssignmentOp(), clang::BinaryOperator::isComparisonOp(), clang::BinaryOperator::isEqualityOp(), clang::Type::isFixedPointType(), clang::FPOptions::isFPConstrained(), clang::Type::isIncompleteType(), clang::Type::isIntegralOrEnumerationType(), IsLiteralLValue(), clang::Type::isMemberPointerType(), clang::Type::isNullPtrType(), isOnePastTheEndOfCompleteObject(), clang::Type::isPointerType(), clang::Type::isRealFloatingType(), clang::BinaryOperator::isRelationalOp(), clang::TagDecl::isUnion(), clang::Expr::isValueDependent(), clang::Type::isVoidPointerType(), IsWeakLValue(), and isZeroSized().

EvaluateComplex()

static bool EvaluateComplex ( const Expr *  E, ComplexValue &  Res, EvalInfo &  Info  )

static

Definition at line 14233 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isAnyComplexType(), clang::Expr::isPRValue(), and clang::Expr::isValueDependent().

Referenced by Evaluate(), and EvaluateComparisonBinaryOperator().

EvaluateCond()

static bool EvaluateCond ( EvalInfo &  Info, const VarDecl *  CondDecl, const Expr *  Cond, bool &  Result  )

static

Evaluate a condition (either a variable declaration or an expression).

Definition at line 4907 of file ExprConstant.cpp.

References EvaluateAsBooleanCondition(), EvaluateDecl(), and clang::Expr::isValueDependent().

EvaluateCPlusPlus11IntegralConstantExpr()

static bool EvaluateCPlusPlus11IntegralConstantExpr ( const ASTContext &  Ctx, const Expr *  E, llvm::APSInt *  Value, SourceLocation *  Loc  )

static

Evaluate an expression as a C++11 integral constant expression.

Definition at line 15899 of file ExprConstant.cpp.

References clang::Expr::getExprLoc(), clang::Expr::getType(), clang::Expr::isCXX11ConstantExpr(), and clang::Type::isIntegralOrUnscopedEnumerationType().

Referenced by clang::Expr::getIntegerConstantExpr(), and clang::Expr::isIntegerConstantExpr().

EvaluateDecl()

static bool EvaluateDecl ( EvalInfo &  Info, const Decl *  D  )

static

Definition at line 4883 of file ExprConstant.cpp.

References EvaluateVarDecl().

Referenced by EvaluateCond(), and EvaluateSwitch().

EvaluateDependentExpr()

static bool EvaluateDependentExpr ( const Expr *  E, EvalInfo &  Info  )

static

Definition at line 4897 of file ExprConstant.cpp.

References clang::Expr::containsErrors(), and clang::Expr::isValueDependent().

Referenced by EvaluateSwitch(), and HandleConstructorCall().

EvaluateDestruction()

static bool EvaluateDestruction ( const ASTContext &  Ctx, APValue::LValueBase  Base, APValue  DestroyedValue, QualType  Type, SourceLocation  Loc, Expr::EvalStatus &  EStatus, bool  IsConstantDestruction  )

static

Definition at line 15216 of file ExprConstant.cpp.

References HandleDestruction(), and clang::Expr::EvalStatus::HasSideEffects.

Referenced by clang::VarDecl::evaluateDestruction().

EvaluateFixedPoint()

static bool EvaluateFixedPoint ( const Expr *  E, APFixedPoint &  Result, EvalInfo &  Info  )

static

Evaluate only a fixed point expression into an APResult.

Definition at line 11149 of file ExprConstant.cpp.

References clang::APValue::getFixedPoint(), clang::Expr::getType(), clang::APValue::isFixedPoint(), clang::Type::isFixedPointType(), and clang::Expr::isValueDependent().

Referenced by EvaluateFixedPointOrInteger().

EvaluateFixedPointOrInteger()

static bool EvaluateFixedPointOrInteger ( const Expr *  E, APFixedPoint &  Result, EvalInfo &  Info  )

static

Evaluate an integer or fixed point expression into an APResult.

Definition at line 11165 of file ExprConstant.cpp.

References EvaluateFixedPoint(), EvaluateInteger(), clang::Expr::getType(), clang::Type::isFixedPointType(), clang::Type::isIntegerType(), and clang::Expr::isValueDependent().

Referenced by EvaluateComparisonBinaryOperator().

EvaluateFloat()

static bool EvaluateFloat ( const Expr *  E, APFloat &  Result, EvalInfo &  Info  )

static

Definition at line 13935 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Expr::isPRValue(), clang::Type::isRealFloatingType(), and clang::Expr::isValueDependent().

Referenced by Evaluate(), and EvaluateComparisonBinaryOperator().

EvaluateIgnoredValue()

static bool EvaluateIgnoredValue ( EvalInfo &  Info, const Expr *  E  )

static

Evaluate an expression to see if it had side-effects, and discard its result.

Returns

true if the caller should keep evaluating.

Definition at line 1962 of file ExprConstant.cpp.

References Evaluate(), and clang::Expr::isValueDependent().

Referenced by HandleOperatorDeleteCall(), and HandleOperatorNewCall().

EvaluateInPlace()

static bool EvaluateInPlace ( APValue &  Result, EvalInfo &  Info, const LValue &  This, const Expr *  E, bool  AllowNonLiteralTypes  )

static

EvaluateInPlace - Evaluate an expression in-place in an APValue.

In some cases, the in-place evaluation is essential, since later initializers for an object can indirectly refer to subobjects which were initialized earlier.

Definition at line 14984 of file ExprConstant.cpp.

References CheckLiteralType(), Evaluate(), EvaluateArray(), EvaluateAtomic(), EvaluateRecord(), clang::QualType::getAtomicUnqualifiedType(), clang::Expr::getType(), clang::Type::isArrayType(), clang::Type::isAtomicType(), clang::Expr::isPRValue(), clang::Type::isRecordType(), clang::Expr::isValueDependent(), and clang::interp::This().

Referenced by EvaluateCallArg(), EvaluateVarDecl(), and HandleConstructorCall().

EvaluateInteger()

static bool EvaluateInteger ( const Expr *  E, APSInt &  Result, EvalInfo &  Info  )

static

Definition at line 11128 of file ExprConstant.cpp.

References EvaluateIntegerOrLValue(), clang::APValue::getInt(), clang::APValue::isInt(), and clang::Expr::isValueDependent().

Referenced by EvaluateComparisonBinaryOperator(), EvaluateFixedPointOrInteger(), EvaluateSwitch(), getAlignmentArgument(), getBuiltinAlignArguments(), and HandleOperatorNewCall().

EvaluateIntegerOrLValue()

static bool EvaluateIntegerOrLValue ( const Expr *  E, APValue &  Result, EvalInfo &  Info  )

static

EvaluateIntegerOrLValue - Evaluate an rvalue integral-typed expression, and produce either the integer value or a pointer.

GCC has a heinous extension which folds casts between pointer types and pointer-sized integral types. We support this by allowing the evaluation of an integer rvalue to produce a pointer (represented as an lvalue) instead. Some simple arithmetic on such values is supported (they are treated much like char*).

Definition at line 11121 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isIntegralOrEnumerationType(), clang::Expr::isPRValue(), and clang::Expr::isValueDependent().

Referenced by EvaluateInteger().

EvaluateLoopBody()

static EvalStmtResult EvaluateLoopBody ( StmtResult &  Result, EvalInfo &  Info, const Stmt *  Body, const SwitchCase *  Case = nullptr  )

static

Evaluate the body of a loop, and translate the result as appropriate.

Definition at line 4948 of file ExprConstant.cpp.

References EvaluateStmt().

EvaluateLValue()

static bool EvaluateLValue ( const Expr *  E, LValue &  Result, EvalInfo &  Info, bool  InvalidBaseOK  )

static

Evaluate an expression as an lvalue.

This can be legitimately called on expressions which are not glvalues, in three cases:

• function designators in C, and
• "extern void" objects
• @selector() expressions in Objective-C

Definition at line 8222 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Expr::IgnoreParens(), clang::Type::isFunctionType(), clang::Expr::isGLValue(), clang::Expr::isValueDependent(), and clang::Type::isVoidType().

Referenced by Evaluate(), clang::Expr::EvaluateAsLValue(), EvaluateComparisonBinaryOperator(), and EvaluateObjectArgument().

evaluateLValueAsAllocSize()

static bool evaluateLValueAsAllocSize ( EvalInfo &  Info, APValue::LValueBase  Base, LValue &  Result  )

static

Attempts to evaluate the given LValueBase as the result of a call to a function with the alloc_size attribute.

If it was possible to do so, this function will return true, make Result's Base point to said function call, and mark Result's Base as invalid.

Definition at line 8661 of file ExprConstant.cpp.

References clang::Type::castAs(), clang::VarDecl::getAnyInitializer(), clang::Expr::getType(), clang::ValueDecl::getType(), clang::QualType::isConstQualified(), and clang::VarDecl::isLocalVarDecl().

EvaluateMemberPointer()

static bool EvaluateMemberPointer ( const Expr *  E, MemberPtr &  Result, EvalInfo &  Info  )

static

Definition at line 9737 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::isMemberPointerType(), clang::Expr::isPRValue(), and clang::Expr::isValueDependent().

Referenced by Evaluate(), EvaluateComparisonBinaryOperator(), and HandleMemberPointerAccess().

EvaluateObjectArgument()

static bool EvaluateObjectArgument ( EvalInfo &  Info, const Expr *  Object, LValue &  This  )

static

Build an lvalue for the object argument of a member function call.

Definition at line 4627 of file ExprConstant.cpp.

References EvaluateLValue(), EvaluatePointer(), EvaluateTemporary(), and clang::interp::This().

Referenced by HandleMemberPointerAccess().

EvaluatePointer()

static bool EvaluatePointer ( const Expr *  E, LValue &  Result, EvalInfo &  Info, bool  InvalidBaseOK = false  )

static

Definition at line 8822 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Type::hasPointerRepresentation(), clang::Expr::isPRValue(), and clang::Expr::isValueDependent().

Referenced by Evaluate(), EvaluateBuiltinStrLen(), EvaluateComparisonBinaryOperator(), EvaluateObjectArgument(), getBuiltinAlignArguments(), HandleOperatorDeleteCall(), and tryEvaluateBuiltinObjectSize().

EvaluateRecord()

static bool EvaluateRecord ( const Expr *  E, const LValue &  This, APValue &  Result, EvalInfo &  Info  )

static

Definition at line 10245 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Expr::isPRValue(), clang::Type::isRecordType(), clang::Expr::isValueDependent(), and clang::interp::This().

Referenced by Evaluate(), and EvaluateInPlace().

EvaluateStmt()

static EvalStmtResult EvaluateStmt ( StmtResult &  Result, EvalInfo &  Info, const Stmt *  S, const SwitchCase *  SC = nullptr  )

static

Definition at line 5062 of file ExprConstant.cpp.

Referenced by EvaluateLoopBody(), EvaluateSwitch(), HandleConstructorCall(), HandleDestructionImpl(), and HandleFunctionCall().

EvaluateSwitch()

static EvalStmtResult EvaluateSwitch ( StmtResult &  Result, EvalInfo &  Info, const SwitchStmt *  SS  )

static

Evaluate a switch statement.

Definition at line 4972 of file ExprConstant.cpp.

References EvaluateDecl(), EvaluateDependentExpr(), EvaluateInteger(), clang::Expr::EvaluateKnownConstInt(), EvaluateStmt(), clang::SwitchCase::getBeginLoc(), clang::SwitchStmt::getBody(), clang::SwitchStmt::getCond(), clang::SwitchStmt::getConditionVariable(), clang::SwitchStmt::getInit(), clang::CaseStmt::getLHS(), clang::SwitchCase::getNextSwitchCase(), clang::CaseStmt::getRHS(), clang::SwitchStmt::getSwitchCaseList(), and clang::Expr::isValueDependent().

EvaluateTemporary()

static bool EvaluateTemporary ( const Expr *  E, LValue &  Result, EvalInfo &  Info  )

static

Evaluate an expression of record type as a temporary.

Definition at line 10302 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Expr::isPRValue(), clang::Type::isRecordType(), and clang::Expr::isValueDependent().

Referenced by EvaluateObjectArgument().

EvaluateVarDecl()

static bool EvaluateVarDecl ( EvalInfo &  Info, const VarDecl *  VD  )

static

Definition at line 4853 of file ExprConstant.cpp.

References EvaluateInPlace(), getDefaultInitValue(), clang::VarDecl::getInit(), clang::ValueDecl::getType(), clang::VarDecl::hasLocalStorage(), clang::Type::isDependentType(), clang::Decl::isInvalidDecl(), and clang::Expr::isValueDependent().

Referenced by EvaluateDecl().

evaluateVarDeclInit()

static bool evaluateVarDeclInit ( EvalInfo &  Info, const Expr *  E, const VarDecl *  VD, CallStackFrame *  Frame, unsigned  Version, APValue *&  Result  )

static

Try to evaluate the initializer for a variable declaration.

Parameters

Info	Information about the ongoing evaluation.
E	An expression to be used when printing diagnostics.
VD	The variable whose initializer should be obtained.
Version	The version of the variable within the frame.
Frame	The frame in which the variable was created. Must be null if this variable is not local to the evaluation.
Result	Filled in with a pointer to the value of the variable.

Definition at line 3246 of file ExprConstant.cpp.

Referenced by findCompleteObject().

EvaluateVector()

static bool EvaluateVector ( const Expr *  E, APValue &  Result, EvalInfo &  Info  )

static

Definition at line 10346 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Expr::isPRValue(), and clang::Type::isVectorType().

Referenced by Evaluate().

EvaluateVoid()

static bool EvaluateVoid ( const Expr *  E, EvalInfo &  Info  )

static

Definition at line 14889 of file ExprConstant.cpp.

References clang::Expr::getType(), clang::Expr::isPRValue(), clang::Expr::isValueDependent(), and clang::Type::isVoidType().

Referenced by Evaluate().

expandArray()

static void expandArray ( APValue &  Array, unsigned  Index  )

static

Definition at line 3441 of file ExprConstant.cpp.

Referenced by HandleDestructionImpl().

expandStringLiteral()

static void expandStringLiteral ( EvalInfo &  Info, const StringLiteral *  S, APValue &  Result, QualType  AllocType = QualType()  )

static

Definition at line 3418 of file ExprConstant.cpp.

extractStringLiteralCharacter()

static APSInt extractStringLiteralCharacter ( EvalInfo &  Info, const Expr *  Lit, uint64_t  Index  )

static

Extract the value of a character from a string literal.

Definition at line 3385 of file ExprConstant.cpp.

Referenced by handleLValueToRValueConversion().

extractSubobject()

static bool extractSubobject ( EvalInfo &  Info, const Expr *  E, const CompleteObject &  Obj, const SubobjectDesignator &  Sub, APValue &  Result, AccessKinds  AK = AK_Read  )

static

Extract the designated sub-object of an rvalue.

Definition at line 3842 of file ExprConstant.cpp.

References clang::threadSafety::AK_Read, clang::AK_ReadObjectRepresentation, findSubobject(), and clang::interp::Sub().

Referenced by handleLValueToRValueConversion().

FastEvaluateAsRValue()

static bool FastEvaluateAsRValue ( const Expr *  Exp, Expr::EvalResult &  Result, const ASTContext &  Ctx, bool &  IsConst  )

static

Definition at line 15043 of file ExprConstant.cpp.

References clang::ASTContext::getLangOpts(), clang::Expr::getType(), clang::Type::isArrayType(), clang::QualType::isNull(), clang::Expr::isPRValue(), and clang::Type::isRecordType().

Referenced by clang::Expr::EvaluateAsConstantExpr(), EvaluateAsRValue(), and clang::Expr::EvaluateForOverflow().

findCompleteObject()

static CompleteObject findCompleteObject ( EvalInfo &  Info, const Expr *  E, AccessKinds  AK, const LValue &  LVal, QualType  LValType  )

static

Find the complete object to which an LValue refers.

Definition at line 3967 of file ExprConstant.cpp.

References Depth, evaluateVarDeclInit(), clang::APValue::getAsString(), clang::VarDecl::getDefinition(), clang::Decl::getLocation(), clang::VarDecl::hasDefinition(), isAnyAccess(), clang::QualType::isConstant(), clang::VarDecl::isConstexpr(), isFormalAccess(), clang::Type::isIntegralOrEnumerationType(), clang::Decl::isInvalidDecl(), clang::Type::isLiteralType(), isModification(), clang::QualType::isVolatileQualified(), lifetimeStartedInEvaluation(), NoteLValueLocation(), clang::SD_Static, and V.

Referenced by checkDynamicType(), handleAssignment(), handleCompoundAssignment(), HandleDestruction(), handleIncDec(), and handleLValueToRValueConversion().

FindDesignatorMismatch()

static unsigned FindDesignatorMismatch ( QualType  ObjType, const SubobjectDesignator &  A, const SubobjectDesignator &  B, bool &  WasArrayIndex  )

static

Find the position where two subobject designators diverge, or equivalently the length of the common initial subsequence.

Definition at line 3910 of file ExprConstant.cpp.

References clang::Type::castAs(), clang::Type::castAsArrayTypeUnsafe(), clang::ArrayType::getElementType(), clang::Type::isAnyComplexType(), clang::Type::isArrayType(), clang::QualType::isNull(), and min().

Referenced by AreElementsOfSameArray(), and EvaluateComparisonBinaryOperator().

findSubobject()

template<typename SubobjectHandler >

SubobjectHandler::result_type findSubobject	(	EvalInfo &	Info,
		const Expr *	E,
		const CompleteObject &	Obj,
		const SubobjectDesignator &	Sub,
		SubobjectHandler &	handler
	)

Find the designated sub-object of an rvalue.

Definition at line 3618 of file ExprConstant.cpp.

References clang::AK_Construct, diagnoseMutableFields(), clang::Expr::getExprLoc(), clang::Decl::getLocation(), clang::APValue::isAbsent(), clang::Type::isAnyComplexType(), clang::Type::isArrayType(), clang::FieldDecl::isBitField(), clang::QualType::isConstQualified(), isFormalAccess(), clang::APValue::isIndeterminate(), isModification(), clang::Type::isRecordType(), isValidIndeterminateAccess(), clang::QualType::isVolatileQualified(), clang::QualType::removeLocalConst(), clang::QualType::removeLocalVolatile(), clang::interp::Sub(), and truncateBitfieldValue().

Referenced by checkDynamicType(), extractSubobject(), handleCompoundAssignment(), HandleDestruction(), handleIncDec(), and modifySubobject().

getActiveRoundingMode()

static llvm::RoundingMode getActiveRoundingMode ( EvalInfo &  Info, const Expr *  E  )

static

Get rounding mode to use in evaluation of the specified expression.

If rounding mode is unknown at compile time, still try to evaluate the expression. If the result is exact, it does not depend on rounding mode. So return "tonearest" mode instead of "dynamic".

Definition at line 2572 of file ExprConstant.cpp.

References clang::Expr::getFPFeaturesInEffect(), and clang::FPOptions::getRoundingMode().

Referenced by handleFloatFloatBinOp(), HandleFloatToFloatCast(), and HandleIntToFloatCast().

getAlignmentArgument()

static bool getAlignmentArgument ( const Expr *  E, QualType  ForType, EvalInfo &  Info, APSInt &  Alignment  )

static

Evaluate the value of the alignment argument to __builtin_align_{up,down}, __builtin_is_aligned and __builtin_assume_aligned.

Definition at line 9074 of file ExprConstant.cpp.

References EvaluateInteger().

Referenced by getBuiltinAlignArguments().

GetAlignOfExpr()

static CharUnits GetAlignOfExpr ( EvalInfo &  Info, const Expr *  E, UnaryExprOrTypeTrait  ExprKind  )

static

Definition at line 9043 of file ExprConstant.cpp.

References GetAlignOfType(), clang::Expr::getType(), and clang::Expr::IgnoreParens().

Referenced by getBaseAlignment().

GetAlignOfType()

static CharUnits GetAlignOfType ( EvalInfo &  Info, QualType  T, UnaryExprOrTypeTrait  ExprKind  )

static

Definition at line 9016 of file ExprConstant.cpp.

References clang::Type::getAs(), clang::Type::getPointeeType(), clang::QualType::getQualifiers(), clang::QualType::getTypePtr(), and clang::Qualifiers::hasUnaligned().

Referenced by GetAlignOfExpr(), and getBaseAlignment().

getBaseAlignment()

static CharUnits getBaseAlignment ( EvalInfo &  Info, const LValue &  Value  )

static

Definition at line 9064 of file ExprConstant.cpp.

References GetAlignOfExpr(), and GetAlignOfType().

getBaseClassType()

static const CXXRecordDecl* getBaseClassType ( SubobjectDesignator &  Designator, unsigned  PathLength  )

static

Definition at line 5665 of file ExprConstant.cpp.

Referenced by ComputeDynamicType(), and HandleVirtualDispatch().

getBaseIndex()

static unsigned getBaseIndex ( const CXXRecordDecl *  Derived, const CXXRecordDecl *  Base  )

static

Get the base index of the given base class within an APValue representing the given derived class.

Definition at line 3371 of file ExprConstant.cpp.

getBuiltinAlignArguments()

static bool getBuiltinAlignArguments ( const CallExpr *  E, EvalInfo &  Info, APValue &  Val, APSInt &  Alignment  )

static

Definition at line 11809 of file ExprConstant.cpp.

References EvaluateInteger(), EvaluatePointer(), getAlignmentArgument(), clang::CallExpr::getArg(), clang::Expr::getType(), clang::APValue::hasValue(), clang::Type::isIntegralOrEnumerationType(), and clang::Type::isPointerType().

getBytesReturnedByAllocSizeCall() [1/2]

static bool getBytesReturnedByAllocSizeCall ( const ASTContext &  Ctx, const CallExpr *  Call, llvm::APInt &  Result  )

static

Attempts to compute the number of bytes available at the pointer returned by a function with the alloc_size attribute.

Returns true if we were successful. Places an unsigned number into Result.

This expects the given CallExpr to be a call to a function with an alloc_size attribute.

Definition at line 8600 of file ExprConstant.cpp.

References clang::Expr::EvaluateAsInt(), clang::ASTContext::getSizeType(), and clang::ASTContext::getTypeSize().

Referenced by determineEndOffset(), and getBytesReturnedByAllocSizeCall().

getBytesReturnedByAllocSizeCall() [2/2]

static bool getBytesReturnedByAllocSizeCall ( const ASTContext &  Ctx, const LValue &  LVal, llvm::APInt &  Result  )

static

Convenience function.

LVal's base must be a call to an alloc_size function.

Definition at line 8647 of file ExprConstant.cpp.

References getBytesReturnedByAllocSizeCall().

getDefaultInitValue()

static bool getDefaultInitValue ( QualType  T, APValue &  Result  )

static

Get the value to use for a default-initialized object of type T.

Return false if it encounters something invalid.

Definition at line 4793 of file ExprConstant.cpp.

References distance(), and clang::Type::getAsCXXRecordDecl().

Referenced by clang::VarDecl::evaluateDestruction(), EvaluateVarDecl(), and HandleConstructorCall().

GetLValueBaseDecl()

static const ValueDecl* GetLValueBaseDecl ( const LValue &  LVal )

static

Definition at line 2046 of file ExprConstant.cpp.

Referenced by IsWeakLValue(), and isZeroSized().

getObjectType()

static QualType getObjectType ( APValue::LValueBase  B )

static

Retrieves the "underlying object type" of the given expression, as used by __builtin_object_size.

Definition at line 11470 of file ExprConstant.cpp.

References clang::APValue::LValueBase::dyn_cast(), clang::APValue::LValueBase::getDynamicAllocType(), clang::Expr::getType(), clang::ValueDecl::getType(), clang::APValue::LValueBase::getTypeInfoType(), and clang::APValue::LValueBase::is().

Referenced by clang::Sema::checkInitMethod(), and determineEndOffset().

getSubobjectType()

static QualType getSubobjectType ( QualType  ObjType, QualType  SubobjType, bool  IsMutable = false  )

static

Definition at line 3601 of file ExprConstant.cpp.

References clang::QualType::addConst(), clang::QualType::addVolatile(), clang::QualType::isConstQualified(), and clang::QualType::isVolatileQualified().

getVirtualOperatorDelete()

static const FunctionDecl* getVirtualOperatorDelete ( QualType  T )

static

Definition at line 6729 of file ExprConstant.cpp.

References clang::Type::getAsCXXRecordDecl().

handleAssignment()

static bool handleAssignment ( EvalInfo &  Info, const Expr *  E, const LValue &  LVal, QualType  LValType, APValue &  Val  )

static

Perform an assignment of Val to LVal. Takes ownership of Val.

Definition at line 4323 of file ExprConstant.cpp.

References clang::AK_Assign, findCompleteObject(), and modifySubobject().

Referenced by HandleFunctionCall().

HandleBaseToDerivedCast()

static bool HandleBaseToDerivedCast ( EvalInfo &  Info, const CastExpr *  E, LValue &  Result  )

static

HandleBaseToDerivedCast - Apply the given base-to-derived cast operation on the provided lvalue, which currently refers to the base object.

Definition at line 4755 of file ExprConstant.cpp.

References CastToDerivedClass(), clang::CSK_Derived, clang::Type::getAs(), clang::Type::getAsCXXRecordDecl(), clang::CXXRecordDecl::getCanonicalDecl(), clang::Type::getPointeeType(), clang::Expr::getType(), and clang::CastExpr::path_size().

HandleClassZeroInitialization()

static bool HandleClassZeroInitialization ( EvalInfo &  Info, const Expr *  E, const RecordDecl *  RD, const LValue &  This, APValue &  Result  )

static

Perform zero-initialization on an object of non-union class type.

C++11 [dcl.init]p5: To zero-initialize an object or reference of type T means: [...] – if T is a (possibly cv-qualified) non-union class type, each non-static data member and each base-class subobject is zero-initialized

Definition at line 9841 of file ExprConstant.cpp.

References distance(), clang::RecordDecl::field_begin(), clang::RecordDecl::field_end(), clang::CXXRecordDecl::getNumBases(), clang::Decl::isInvalidDecl(), and clang::TagDecl::isUnion().

handleCompareOpForVector()

static bool handleCompareOpForVector ( const APValue &  LHSValue, BinaryOperatorKind  Opcode, const APValue &  RHSValue, APInt &  Result  )

static

Definition at line 2963 of file ExprConstant.cpp.

References clang::RISCV::Float, clang::APValue::getFloat(), clang::APValue::getInt(), clang::APValue::getKind(), and handleCompareOpForVectorHelper().

Referenced by handleVectorVectorBinOp().

handleCompareOpForVectorHelper()

template<typename APTy >

static bool handleCompareOpForVectorHelper ( const APTy &  LHSValue, BinaryOperatorKind  Opcode, const APTy &  RHSValue, APInt &  Result  )

static

Definition at line 2930 of file ExprConstant.cpp.

Referenced by handleCompareOpForVector().

handleCompoundAssignment()

static bool handleCompoundAssignment ( EvalInfo &  Info, const CompoundAssignOperator *  E, const LValue &  LVal, QualType  LValType, QualType  PromotedLValType, BinaryOperatorKind  Opcode, const APValue &  RVal  )

static

Perform a compound assignment of LVal <op>= RVal.

Definition at line 4462 of file ExprConstant.cpp.

References clang::AK_Assign, findCompleteObject(), and findSubobject().

HandleConstructorCall() [1/2]

static bool HandleConstructorCall ( const Expr *  E, const LValue &  This, ArrayRef< const Expr * >  Args, const CXXConstructorDecl *  Definition, EvalInfo &  Info, APValue &  Result  )

static

Definition at line 6432 of file ExprConstant.cpp.

References EvaluateArgs(), HandleConstructorCall(), and clang::interp::This().

HandleConstructorCall() [2/2]

static bool HandleConstructorCall ( const Expr *  E, const LValue &  This, CallRef  Call, const CXXConstructorDecl *  Definition, EvalInfo &  Info, APValue &  Result  )

static

Evaluate a constructor call.

Definition at line 6219 of file ExprConstant.cpp.

References clang::CXXRecordDecl::bases_begin(), clang::declaresSameEntity(), distance(), EvaluateDependentExpr(), EvaluateInPlace(), EvaluateStmt(), clang::RecordDecl::field_begin(), clang::RecordDecl::field_end(), clang::Type::getAsCXXRecordDecl(), getDefaultInitValue(), clang::Expr::getExprLoc(), clang::FieldDecl::getFieldIndex(), clang::CXXRecordDecl::getNumBases(), clang::CXXRecordDecl::getNumVBases(), clang::FieldDecl::getParent(), clang::CXXBaseSpecifier::getType(), HandleLValueDirectBase(), HandleLValueMember(), handleTrivialCopy(), clang::FieldDecl::isBitField(), clang::Decl::isInvalidDecl(), isReadByLvalueToRvalueConversion(), clang::TagDecl::isUnion(), clang::CXXBaseSpecifier::isVirtual(), Ret(), clang::interp::This(), and truncateBitfieldValue().

Referenced by HandleConstructorCall().

HandleConversionToBool()

static bool HandleConversionToBool ( const APValue &  Val, bool &  Result  )

static

Definition at line 2496 of file ExprConstant.cpp.

References EvalPointerValueAsBool(), clang::RISCV::Float, clang::APValue::getComplexFloatImag(), clang::APValue::getComplexFloatReal(), clang::APValue::getComplexIntImag(), clang::APValue::getComplexIntReal(), clang::APValue::getFixedPoint(), clang::APValue::getFloat(), clang::APValue::getInt(), clang::APValue::getKind(), and clang::APValue::getMemberPointerDecl().

Referenced by clang::Expr::EvaluateAsBooleanCondition(), and EvaluateAsBooleanCondition().

HandleCovariantReturnAdjustment()

static bool HandleCovariantReturnAdjustment ( EvalInfo &  Info, const Expr *  E, APValue &  Result, ArrayRef< QualType >  Path  )

static

Perform the adjustment from a value returned by a virtual function to a value of the statically expected type, which may be a pointer or reference to a base class of the returned type.

Definition at line 5795 of file ExprConstant.cpp.

References CastToBaseClass().

HandleDestruction() [1/2]

static bool HandleDestruction ( EvalInfo &  Info, const Expr *  E, const LValue &  This, QualType  ThisType  )

static

Perform a destructor or pseudo-destructor call on the given object, which might in general not be a complete object.

Definition at line 6637 of file ExprConstant.cpp.

References clang::AK_Destroy, findCompleteObject(), findSubobject(), and clang::interp::This().

Referenced by EvaluateDestruction().

HandleDestruction() [2/2]

static bool HandleDestruction ( EvalInfo &  Info, SourceLocation  Loc, APValue::LValueBase  LVBase, APValue &  Value, QualType  T  )

static

Destroy and end the lifetime of the given complete object.

Definition at line 6645 of file ExprConstant.cpp.

References HandleDestructionImpl().

HandleDestructionImpl()

static bool HandleDestructionImpl ( EvalInfo &  Info, SourceLocation  CallLoc, const LValue &  This, APValue &  Value, QualType  T  )

static

Definition at line 6445 of file ExprConstant.cpp.

References clang::CXXRecordDecl::bases(), CheckConstexprFunction(), EvaluateStmt(), expandArray(), clang::RecordDecl::fields(), clang::APValue::getArrayInitializedElt(), clang::Type::getAsCXXRecordDecl(), clang::APValue::getAsString(), clang::FunctionDecl::getBody(), clang::CXXRecordDecl::getDestructor(), clang::ArrayType::getElementType(), clang::CXXRecordDecl::getNumBases(), clang::CXXRecordDecl::getNumVBases(), clang::ConstantArrayType::getSize(), clang::APValue::getStructBase(), clang::APValue::getStructField(), HandleLValueArrayAdjustment(), HandleLValueDirectBase(), HandleLValueMember(), clang::CXXRecordDecl::hasTrivialDestructor(), clang::RecordDecl::isAnonymousStructOrUnion(), clang::QualType::isDestructedType(), clang::Type::isNullPtrType(), clang::FunctionDecl::isTrivial(), clang::TagDecl::isUnion(), Ret(), clang::interp::This(), and clang::VK_PRValue.

Referenced by HandleDestruction().

HandleDynamicCast()

static bool HandleDynamicCast ( EvalInfo &  Info, const ExplicitCastExpr *  E, LValue &  Ptr  )

static

Apply the given dynamic cast operation on the provided lvalue.

This implements the hard case of dynamic_cast, requiring a "runtime check" to find a suitable target subobject.

Definition at line 5836 of file ExprConstant.cpp.

References clang::AK_DynamicCast, CastToDerivedClass(), ComputeDynamicType(), clang::Type::getPointeeCXXRecordDecl(), clang::Expr::getType(), clang::ExplicitCastExpr::getTypeAsWritten(), clang::Expr::isGLValue(), and clang::Type::isVoidPointerType().

handleFloatFloatBinOp()

static bool handleFloatFloatBinOp ( EvalInfo &  Info, const BinaryOperator *  E, APFloat &  LHS, BinaryOperatorKind  Opcode, const APFloat &  RHS  )

static

Perform the given binary floating-point operation, in-place, on LHS.

Definition at line 2852 of file ExprConstant.cpp.

References checkFloatingPointResult(), and getActiveRoundingMode().

Referenced by handleVectorVectorBinOp().

HandleFloatToFloatCast()

static bool HandleFloatToFloatCast ( EvalInfo &  Info, const Expr *  E, QualType  SrcType, QualType  DestType, APFloat &  Result  )

static

Definition at line 2621 of file ExprConstant.cpp.

References checkFloatingPointResult(), and getActiveRoundingMode().

HandleFloatToIntCast()

static bool HandleFloatToIntCast ( EvalInfo &  Info, const Expr *  E, QualType  SrcType, const APFloat &  Value, QualType  DestType, APSInt &  Result  )

static

Definition at line 2552 of file ExprConstant.cpp.

References HandleOverflow(), and clang::Type::isSignedIntegerOrEnumerationType().

HandleFunctionCall()

static bool HandleFunctionCall ( SourceLocation  CallLoc, const FunctionDecl *  Callee, const LValue *  This, ArrayRef< const Expr * >  Args, CallRef  Call, const Stmt *  Body, EvalInfo &  Info, APValue &  Result, const LValue *  ResultSlot  )

static

Evaluate a function call.

Definition at line 6164 of file ExprConstant.cpp.

References EvaluateStmt(), clang::CXXRecordDecl::getCaptureFields(), clang::FunctionDecl::getParamDecl(), clang::CXXMethodDecl::getParent(), clang::CXXMethodDecl::getThisType(), handleAssignment(), handleTrivialCopy(), clang::CXXMethodDecl::isCopyAssignmentOperator(), clang::FunctionDecl::isDefaulted(), clang::isLambdaCallOperator(), clang::CXXMethodDecl::isMoveAssignmentOperator(), isReadByLvalueToRvalueConversion(), clang::FunctionDecl::isTrivial(), clang::TagDecl::isUnion(), Ret(), and clang::interp::This().

handleIncDec()

static bool handleIncDec ( EvalInfo &  Info, const Expr *  E, const LValue &  LVal, QualType  LValType, bool  IsIncrement, APValue *  Old  )

static

Perform an increment or decrement on LVal.

Definition at line 4610 of file ExprConstant.cpp.

References clang::AK_Decrement, clang::AK_Increment, findCompleteObject(), and findSubobject().

handleIntIntBinOp()

static bool handleIntIntBinOp ( EvalInfo &  Info, const Expr *  E, const APSInt &  LHS, BinaryOperatorKind  Opcode, APSInt  RHS, APSInt &  Result  )

static

Perform the given binary integer operation.

Definition at line 2750 of file ExprConstant.cpp.

References CheckedIntArithmetic(), clang::Expr::getType(), and HandleOverflow().

Referenced by handleVectorVectorBinOp().

HandleIntToFloatCast()

static bool HandleIntToFloatCast ( EvalInfo &  Info, const Expr *  E, const FPOptions  FPO, QualType  SrcType, const APSInt &  Value, QualType  DestType, APFloat &  Result  )

static

Definition at line 2646 of file ExprConstant.cpp.

References checkFloatingPointResult(), and getActiveRoundingMode().

HandleIntToIntCast()

static APSInt HandleIntToIntCast ( EvalInfo &  Info, const Expr *  E, QualType  DestType, QualType  SrcType, const APSInt &  Value  )

static

Definition at line 2633 of file ExprConstant.cpp.

References clang::Type::isBooleanType(), and clang::Type::isUnsignedIntegerOrEnumerationType().

handleLogicalOpForVector() [1/3]

static bool handleLogicalOpForVector ( const APFloat &  LHSValue, BinaryOperatorKind  Opcode, const APFloat &  RHSValue, APInt &  Result  )

static

Definition at line 2903 of file ExprConstant.cpp.

handleLogicalOpForVector() [2/3]

static bool handleLogicalOpForVector ( const APInt &  LHSValue, BinaryOperatorKind  Opcode, const APInt &  RHSValue, APInt &  Result  )

static

Definition at line 2891 of file ExprConstant.cpp.

Referenced by handleLogicalOpForVector(), and handleVectorVectorBinOp().

handleLogicalOpForVector() [3/3]

static bool handleLogicalOpForVector ( const APValue &  LHSValue, BinaryOperatorKind  Opcode, const APValue &  RHSValue, APInt &  Result  )

static

Definition at line 2916 of file ExprConstant.cpp.

References clang::RISCV::Float, clang::APValue::getFloat(), clang::APValue::getInt(), clang::APValue::getKind(), and handleLogicalOpForVector().

HandleLValueArrayAdjustment() [1/2]

static bool HandleLValueArrayAdjustment ( EvalInfo &  Info, const Expr *  E, LValue &  LVal, QualType  EltTy, APSInt  Adjustment  )

static

Update a pointer value to model pointer arithmetic.

Parameters

Info	- Information about the ongoing evaluation.
E	- The expression being evaluated, for diagnostic purposes.
LVal	- The pointer value to be updated.
EltTy	- The pointee type represented by LVal.
Adjustment	- The adjustment, in objects of type EltTy, to add.

Definition at line 3201 of file ExprConstant.cpp.

References clang::Expr::getExprLoc(), and HandleSizeof().

Referenced by HandleDestructionImpl(), and HandleLValueArrayAdjustment().

HandleLValueArrayAdjustment() [2/2]

static bool HandleLValueArrayAdjustment ( EvalInfo &  Info, const Expr *  E, LValue &  LVal, QualType  EltTy, int64_t  Adjustment  )

static

Definition at line 3212 of file ExprConstant.cpp.

References HandleLValueArrayAdjustment().

HandleLValueBase()

static bool HandleLValueBase ( EvalInfo &  Info, const Expr *  E, LValue &  Obj, const CXXRecordDecl *  DerivedDecl, const CXXBaseSpecifier *  Base  )

static

Definition at line 3090 of file ExprConstant.cpp.

References CastToDerivedClass(), clang::ASTRecordLayout::getVBaseClassOffset(), HandleLValueDirectBase(), and clang::Decl::isInvalidDecl().

Referenced by HandleLValueBasePath().

HandleLValueBasePath()

static bool HandleLValueBasePath ( EvalInfo &  Info, const CastExpr *  E, QualType  Type, LValue &  Result  )

static

Definition at line 3115 of file ExprConstant.cpp.

References clang::Type::getAsCXXRecordDecl(), HandleLValueBase(), clang::CastExpr::path_begin(), and clang::CastExpr::path_end().

HandleLValueComplexElement()

static bool HandleLValueComplexElement ( EvalInfo &  Info, const Expr *  E, LValue &  LVal, QualType  EltTy, bool  Imag  )

static

Update an lvalue to refer to a component of a complex number.

Parameters

Info	- Information about the ongoing evaluation.
LVal	- The lvalue to be updated.
EltTy	- The complex number's component type.
Imag	- False for the real component, true for the imaginary.

Definition at line 3224 of file ExprConstant.cpp.

References clang::Expr::getExprLoc(), and HandleSizeof().

HandleLValueDirectBase()

static bool HandleLValueDirectBase ( EvalInfo &  Info, const Expr *  E, LValue &  Obj, const CXXRecordDecl *  Derived, const CXXRecordDecl *  Base, const ASTRecordLayout *  RL = nullptr  )

static

Definition at line 3076 of file ExprConstant.cpp.

References clang::Decl::isInvalidDecl().

Referenced by HandleConstructorCall(), HandleDestructionImpl(), HandleLValueBase(), and HandleMemberPointerAccess().

HandleLValueIndirectMember()

static bool HandleLValueIndirectMember ( EvalInfo &  Info, const Expr *  E, LValue &  LVal, const IndirectFieldDecl *  IFD  )

static

Update LVal to refer to the given indirect field.

Definition at line 3160 of file ExprConstant.cpp.

References clang::IndirectFieldDecl::chain(), and HandleLValueMember().

HandleLValueMember()

static bool HandleLValueMember ( EvalInfo &  Info, const Expr *  E, LValue &  LVal, const FieldDecl *  FD, const ASTRecordLayout *  RL = nullptr  )

static

Update LVal to refer to the given field, which must be a member of the type currently described by LVal.

Definition at line 3145 of file ExprConstant.cpp.

References clang::FieldDecl::getFieldIndex(), clang::FieldDecl::getParent(), and clang::Decl::isInvalidDecl().

Referenced by HandleConstructorCall(), HandleDestructionImpl(), and HandleLValueIndirectMember().

handleLValueToRValueConversion()

static bool handleLValueToRValueConversion ( EvalInfo &  Info, const Expr *  Conv, QualType  Type, const LValue &  LVal, APValue &  RVal, bool  WantObjectRepresentation = false  )

static

Perform an lvalue-to-rvalue conversion on the given glvalue.

This can also be used for 'lvalue-to-lvalue' conversions for looking up the glvalue referred to by an entity of reference type.

Parameters

Info	- Information about the ongoing evaluation.
Conv	- The expression for which we are performing the conversion. Used for diagnostics.
Type	- The type of the glvalue (before stripping cv-qualifiers in the case of a non-class type).
LVal	- The glvalue on which we are attempting to perform this action.
RVal	- The produced value will be placed here.
WantObjectRepresentation	- If true, we're looking for the object representation rather than the value, and in particular, there is no requirement that the result be fully initialized.

Definition at line 4243 of file ExprConstant.cpp.

References clang::threadSafety::AK_Read, clang::AK_ReadObjectRepresentation, Evaluate(), extractStringLiteralCharacter(), extractSubobject(), findCompleteObject(), clang::Type::isArrayType(), and clang::QualType::isConstant().

Referenced by EvaluateAsRValue(), and handleTrivialCopy().

HandleMemberPointerAccess() [1/2]

static const ValueDecl* HandleMemberPointerAccess ( EvalInfo &  Info, const BinaryOperator *  BO, LValue &  LV, bool  IncludeMember = true  )

static

Definition at line 4735 of file ExprConstant.cpp.

References EvaluateMemberPointer(), EvaluateObjectArgument(), clang::BinaryOperator::getLHS(), clang::BinaryOperator::getOpcode(), clang::BinaryOperator::getRHS(), clang::Expr::getType(), and HandleMemberPointerAccess().

HandleMemberPointerAccess() [2/2]

static const ValueDecl* HandleMemberPointerAccess ( EvalInfo &  Info, QualType  LVType, LValue &  LV, const Expr *  RHS, bool  IncludeMember = true  )

static

HandleMemberPointerAccess - Evaluate a member access operation and build an lvalue referring to the result.

Parameters

Info	- Information about the ongoing evaluation.
LV	- An lvalue referring to the base of the member pointer.
RHS	- The member pointer expression.
IncludeMember	- Specifies whether the member itself is included in the resulting LValue subobject designator. This is not possible when creating a bound member function.

Returns

The field or method declaration to which the member pointer refers, or 0 if evaluation fails.

Definition at line 4653 of file ExprConstant.cpp.

References CastToDerivedClass(), EvaluateMemberPointer(), clang::Type::getAs(), clang::Type::getAsCXXRecordDecl(), clang::CXXRecordDecl::getCanonicalDecl(), clang::Type::getPointeeType(), and HandleLValueDirectBase().

Referenced by HandleMemberPointerAccess().

HandleOperatorDeleteCall()

bool HandleOperatorDeleteCall	(	EvalInfo &	Info,
		const CallExpr *	E
	)

Definition at line 6789 of file ExprConstant.cpp.

References CheckDeleteKind(), EvaluateIgnoredValue(), EvaluatePointer(), clang::CallExpr::getArg(), clang::Expr::getExprLoc(), and clang::CallExpr::getNumArgs().

HandleOperatorNewCall()

static bool HandleOperatorNewCall ( EvalInfo &  Info, const CallExpr *  E, LValue &  Result  )

static

Perform a call to 'perator new' or to ‘__builtin_operator_new’.

Definition at line 6659 of file ExprConstant.cpp.

References EvaluateIgnoredValue(), EvaluateInteger(), clang::CallExpr::getArg(), clang::Expr::getExprLoc(), clang::CallExpr::getNumArgs(), clang::CharUnits::getQuantity(), clang::Expr::getType(), HandleSizeof(), clang::Type::isFunctionType(), clang::Type::isIncompleteType(), and clang::Type::isNothrowT().

HandleOverflow()

template<typename T >

static bool HandleOverflow ( EvalInfo &  Info, const Expr *  E, const T &  SrcValue, QualType  DestType  )

static

Definition at line 2545 of file ExprConstant.cpp.

Referenced by CheckedIntArithmetic(), HandleFloatToIntCast(), and handleIntIntBinOp().

HandleSizeof()

static bool HandleSizeof ( EvalInfo &  Info, SourceLocation  Loc, QualType  Type, CharUnits &  Size  )

static

Get the size of the given type in char units.

Definition at line 3170 of file ExprConstant.cpp.

References clang::Type::isConstantSizeType(), clang::Type::isDependentType(), clang::Type::isFunctionType(), and clang::Type::isVoidType().

Referenced by determineEndOffset(), HandleLValueArrayAdjustment(), HandleLValueComplexElement(), and HandleOperatorNewCall().

handleTrivialCopy()

static bool handleTrivialCopy ( EvalInfo &  Info, const ParmVarDecl *  Param, const Expr *  E, APValue &  Result, bool  CopyObjectRepresentation  )

static

Perform a trivial copy from Param, which is the parameter of a copy or move constructor or assignment operator.

Definition at line 6144 of file ExprConstant.cpp.

References clang::QualType::getNonReferenceType(), clang::ValueDecl::getType(), and handleLValueToRValueConversion().

Referenced by HandleConstructorCall(), and HandleFunctionCall().

HandleUnionActiveMemberChange()

static bool HandleUnionActiveMemberChange ( EvalInfo &  Info, const Expr *  LHSExpr, const LValue &  LHS  )

static

Handle a builtin simple-assignment or a call to a trivial assignment operator whose left-hand side might involve a union member access.

If it does, implicitly start the lifetime of any accessed union elements per C++20 [class.union]5.

Definition at line 5984 of file ExprConstant.cpp.

References clang::declaresSameEntity().

handleVectorUnaryOperator()

static llvm::Optional<APValue> handleVectorUnaryOperator ( ASTContext &  Ctx, QualType  ResultTy, UnaryOperatorKind  Op, APValue  Elt  )

static

Definition at line 10526 of file ExprConstant.cpp.

References clang::RISCV::Float, clang::APValue::getFloat(), clang::APValue::getInt(), clang::ASTContext::getIntWidth(), clang::APValue::getKind(), and clang::Type::isUnsignedIntegerType().

handleVectorVectorBinOp()

static bool handleVectorVectorBinOp ( EvalInfo &  Info, const BinaryOperator *  E, BinaryOperatorKind  Opcode, APValue &  LHSValue, const APValue &  RHSValue  )

static

Definition at line 2976 of file ExprConstant.cpp.

References clang::Type::castAs(), clang::RISCV::Float, clang::APValue::getFloat(), clang::APValue::getInt(), clang::APValue::getKind(), clang::VectorType::getNumElements(), clang::Expr::getType(), clang::APValue::getVectorElt(), clang::APValue::getVectorLength(), handleCompareOpForVector(), handleFloatFloatBinOp(), handleIntIntBinOp(), handleLogicalOpForVector(), clang::Type::isFloatingType(), clang::Type::isIntegerType(), clang::APValue::isLValue(), clang::Type::isUnsignedIntegerType(), and clang::APValue::isVector().

HandleVirtualDispatch()

static const CXXMethodDecl* HandleVirtualDispatch ( EvalInfo &  Info, const Expr *  E, LValue &  This, const CXXMethodDecl *  Found, llvm::SmallVectorImpl< QualType > &  CovariantAdjustmentPath  )

static

Perform virtual dispatch.

Definition at line 5730 of file ExprConstant.cpp.

References clang::AK_Destroy, clang::AK_MemberCall, ComputeDynamicType(), getBaseClassType(), clang::CXXMethodDecl::getCorrespondingMethodDeclaredInClass(), clang::FunctionDecl::getReturnType(), and clang::interp::This().

HasSameBase()

static bool HasSameBase ( const LValue &  A, const LValue &  B  )

static

Definition at line 2073 of file ExprConstant.cpp.

Referenced by EvaluateComparisonBinaryOperator().

hasUnacceptableSideEffect()

static bool hasUnacceptableSideEffect ( Expr::EvalStatus &  Result, Expr::SideEffectsKind  SEK  )

static

Definition at line 15078 of file ExprConstant.cpp.

Referenced by EvaluateAsFixedPoint(), clang::Expr::EvaluateAsFloat(), EvaluateAsInt(), and clang::Expr::isEvaluatable().

hasVirtualDestructor()

static bool hasVirtualDestructor ( QualType  T )

static

Definition at line 6722 of file ExprConstant.cpp.

References clang::Type::getAsCXXRecordDecl().

ignorePointerCastsAndParens()

static const Expr* ignorePointerCastsAndParens ( const Expr *  E )

static

A more selective version of E->IgnoreParenCasts for tryEvaluateBuiltinObjectSize.

This ignores some casts/parens that serve only to change the type of E. Ex. For E = (short*)((char*)(&foo)), returns &foo

Always returns an RValue with a pointer representation.

Definition at line 11492 of file ExprConstant.cpp.

References clang::interp::Cast(), clang::Expr::getType(), clang::Type::hasPointerRepresentation(), clang::Expr::IgnoreParens(), and clang::Expr::isPRValue().

Referenced by tryEvaluateBuiltinObjectSize().

isAnyAccess()

static bool isAnyAccess ( AccessKinds  AK )

static

Definition at line 1484 of file ExprConstant.cpp.

References isModification(), and isRead().

Referenced by findCompleteObject(), and isFormalAccess().

isBaseClassPublic()

static bool isBaseClassPublic ( const CXXRecordDecl *  Derived, const CXXRecordDecl *  Base  )

static

Determine whether Base, which is known to be a direct base class of Derived, is a public base class.

Definition at line 5822 of file ExprConstant.cpp.

References clang::AS_public, clang::CXXRecordDecl::bases(), and clang::declaresSameEntity().

IsDeclSourceLocationCurrent()

static bool IsDeclSourceLocationCurrent ( const FunctionDecl *  FD )

static

Definition at line 8859 of file ExprConstant.cpp.

References clang::NamedDecl::getIdentifier(), clang::DeclContext::getParent(), clang::Decl::isInStdNamespace(), and clang::IdentifierInfo::isStr().

isDesignatorAtObjectEnd()

static bool isDesignatorAtObjectEnd ( const ASTContext &  Ctx, const LValue &  LVal  )

static

Checks to see if the given LValue's Designator is at the end of the LValue's record layout.

e.g. struct { struct { int a, b; } fst, snd; } obj; obj.fst // no obj.snd // yes obj.fst.a // no obj.fst.b // no obj.snd.a // no obj.snd.b // yes

Please note: this function is specialized for how __builtin_object_size views "objects".

If this encounters an invalid RecordDecl or otherwise cannot determine the correct result, it will always return true.

Definition at line 11528 of file ExprConstant.cpp.

References clang::Type::castAs(), clang::ASTContext::getAsArrayType(), clang::ASTContext::getASTRecordLayout(), clang::ArrayType::getElementType(), clang::ASTRecordLayout::getFieldCount(), clang::FieldDecl::getFieldIndex(), clang::FieldDecl::getParent(), clang::Type::isArrayType(), clang::Type::isIncompleteArrayType(), and Parent.

Referenced by isUserWritingOffTheEnd().

isFormalAccess()

static bool isFormalAccess ( AccessKinds  AK )

static

Is this an access per the C++ definition?

Definition at line 1489 of file ExprConstant.cpp.

References clang::AK_Construct, clang::AK_Destroy, and isAnyAccess().

Referenced by findCompleteObject(), and findSubobject().

IsGlobalLValue()

static bool IsGlobalLValue ( APValue::LValueBase  B )

static

Definition at line 1979 of file ExprConstant.cpp.

References clang::APValue::LValueBase::dyn_cast(), clang::APValue::LValueBase::get(), clang::Stmt::getStmtClass(), clang::APValue::LValueBase::is(), clang::CompoundLiteralExpr::isFileScope(), clang::Expr::isLValue(), IsNoOpCall(), and clang::SD_Static.

Referenced by CheckLValueConstantExpression(), and clang::Expr::EvalResult::isGlobalLValue().

IsLiteralLValue()

static bool IsLiteralLValue ( const LValue &  Value )

static

Definition at line 2050 of file ExprConstant.cpp.

Referenced by EvaluateComparisonBinaryOperator().

isModification()

static bool isModification ( AccessKinds  AK )

static

Definition at line 1466 of file ExprConstant.cpp.

References clang::AK_Assign, clang::AK_Construct, clang::AK_Decrement, clang::AK_Destroy, clang::AK_DynamicCast, clang::AK_Increment, clang::AK_MemberCall, clang::threadSafety::AK_Read, clang::AK_ReadObjectRepresentation, and clang::AK_TypeId.

Referenced by findCompleteObject(), findSubobject(), and isAnyAccess().

IsNoOpCall()

static bool IsNoOpCall ( const CallExpr *  E )

static

Should this call expression be treated as a no-op?

Definition at line 1972 of file ExprConstant.cpp.

References clang::CallExpr::getBuiltinCallee().

Referenced by IsGlobalLValue().

isOneByteCharacterType()

static bool isOneByteCharacterType ( QualType  T )

static

Definition at line 9122 of file ExprConstant.cpp.

References clang::Type::isChar8Type(), and clang::Type::isCharType().

isOnePastTheEndOfCompleteObject()

static bool isOnePastTheEndOfCompleteObject ( const ASTContext &  Ctx, const LValue &  LV  )

static

Determine whether this is a pointer past the end of the complete object referred to by the lvalue.

Definition at line 12450 of file ExprConstant.cpp.

References clang::ASTContext::getTypeSizeInChars(), and clang::Type::isIncompleteType().

Referenced by EvaluateComparisonBinaryOperator().

isRead()

static bool isRead ( AccessKinds  AK )

static

Definition at line 1462 of file ExprConstant.cpp.

References clang::threadSafety::AK_Read, and clang::AK_ReadObjectRepresentation.

Referenced by isAnyAccess(), clang::PipeType::isReadOnly(), and clang::PipeType::Profile().

isReadByLvalueToRvalueConversion() [1/2]

static bool isReadByLvalueToRvalueConversion ( const CXXRecordDecl *  RD )

static

Determine whether a type would actually be read by an lvalue-to-rvalue conversion.

If it's of class type, we may assume that the copy operation is trivial. Note that this is never true for a union type with fields (because the copy always "reads" the active member) and always true for a non-class type.

Definition at line 3471 of file ExprConstant.cpp.

References clang::CXXRecordDecl::bases(), clang::RecordDecl::field_empty(), clang::RecordDecl::fields(), clang::CXXRecordDecl::isEmpty(), and clang::TagDecl::isUnion().

Referenced by diagnoseMutableFields(), HandleConstructorCall(), HandleFunctionCall(), and isReadByLvalueToRvalueConversion().

isReadByLvalueToRvalueConversion() [2/2]

static bool isReadByLvalueToRvalueConversion ( QualType  T )

static

Definition at line 3467 of file ExprConstant.cpp.

References clang::Type::getAsCXXRecordDecl(), clang::Type::getBaseElementTypeUnsafe(), and isReadByLvalueToRvalueConversion().

isUserWritingOffTheEnd()

static bool isUserWritingOffTheEnd ( const ASTContext &  Ctx, const LValue &  LVal  )

static

Attempts to detect a user writing into a piece of memory that's impossible to figure out the size of by just using types.

Definition at line 11620 of file ExprConstant.cpp.

References clang::ASTContext::getLangOpts(), and isDesignatorAtObjectEnd().

Referenced by determineEndOffset().

isValidIndeterminateAccess()

static bool isValidIndeterminateAccess ( AccessKinds  AK )

static

Is this kind of axcess valid on an indeterminate object value?

Definition at line 1494 of file ExprConstant.cpp.

References clang::AK_Assign, clang::AK_Construct, clang::AK_Decrement, clang::AK_Destroy, clang::AK_DynamicCast, clang::AK_Increment, clang::AK_MemberCall, clang::threadSafety::AK_Read, clang::AK_ReadObjectRepresentation, and clang::AK_TypeId.

Referenced by findSubobject().

IsWeakLValue()

static bool IsWeakLValue ( const LValue &  Value )

static

Definition at line 2057 of file ExprConstant.cpp.

References GetLValueBaseDecl().

Referenced by EvaluateComparisonBinaryOperator().

isZeroSized()

static bool isZeroSized ( const LValue &  Value )

static

Definition at line 2062 of file ExprConstant.cpp.

References clang::Decl::getASTContext(), GetLValueBaseDecl(), clang::ASTContext::getTypeSize(), clang::Type::isArrayType(), and clang::Type::isIncompleteType().

Referenced by EvaluateComparisonBinaryOperator().

lifetimeStartedInEvaluation()

static bool lifetimeStartedInEvaluation ( EvalInfo &  Info, APValue::LValueBase  Base, bool  MutableSubobject = false  )

static

Definition at line 3526 of file ExprConstant.cpp.

References clang::QualType::isConstQualified(), and clang::Type::isReferenceType().

Referenced by findCompleteObject().

MaybeElementDependentArrayFiller()

static bool MaybeElementDependentArrayFiller ( const Expr *  FillerExpr )

static

Definition at line 10707 of file ExprConstant.cpp.

modifySubobject()

static bool modifySubobject ( EvalInfo &  Info, const Expr *  E, const CompleteObject &  Obj, const SubobjectDesignator &  Sub, APValue &  NewVal  )

static

Update the designated sub-object of an rvalue to the given value.

Definition at line 3900 of file ExprConstant.cpp.

References findSubobject(), and clang::interp::Sub().

Referenced by handleAssignment().

negateAsSigned()

static void negateAsSigned ( APSInt &  Int )

static

Negate an APSInt in place, converting it to a signed form if necessary, and preserving its value (by extending by up to one bit as needed).

Definition at line 1856 of file ExprConstant.cpp.

NoDiag()

static ICEDiag NoDiag ( )

static

Definition at line 15486 of file ExprConstant.cpp.

Referenced by CheckICE().

NoteLValueLocation()

static void NoteLValueLocation ( EvalInfo &  Info, APValue::LValueBase  Base  )

static

Definition at line 2087 of file ExprConstant.cpp.

References clang::Expr::getExprLoc(), clang::ParmVarDecl::getFunctionScopeIndex(), and clang::Decl::getLocation().

Referenced by CheckDeleteKind(), CheckLValueConstantExpression(), and findCompleteObject().

refersToCompleteObject()

static bool refersToCompleteObject ( const LValue &  LVal )

static

Tests to see if the LValue has a user-specified designator (that isn't necessarily valid).

Note that this always returns 'true' if the LValue has an unsized array as its first designator entry, because there's currently no way to tell if the user typed *foo or foo[0].

Definition at line 11602 of file ExprConstant.cpp.

Referenced by determineEndOffset().

truncateBitfieldValue()

static bool truncateBitfieldValue ( EvalInfo &  Info, const Expr *  E, APValue &  Value, const FieldDecl *  FD  )

static

Definition at line 2656 of file ExprConstant.cpp.

References clang::FieldDecl::getBitWidthValue(), and clang::FieldDecl::isBitField().

Referenced by findSubobject(), and HandleConstructorCall().

TryEvaluateBuiltinNaN()

static bool TryEvaluateBuiltinNaN ( const ASTContext &  Context, QualType  ResultTy, const Expr *  Arg, bool  SNaN, llvm::APFloat &  Result  )

static

Definition at line 13941 of file ExprConstant.cpp.

tryEvaluateBuiltinObjectSize()

static bool tryEvaluateBuiltinObjectSize ( const Expr *  E, unsigned  Type, EvalInfo &  Info, uint64_t &  Size  )

static

Tries to evaluate the __builtin_object_size for E.

If successful, returns true and stores the result in Size.

If WasError is non-null, this will report whether the failure to evaluate is to be treated as an Error in IntExprEvaluator.

Definition at line 11760 of file ExprConstant.cpp.

References determineEndOffset(), EvaluateAsRValue(), EvaluatePointer(), clang::Expr::getExprLoc(), ignorePointerCastsAndParens(), and clang::Expr::isGLValue().

Worst()

static ICEDiag Worst ( ICEDiag  A, ICEDiag  B  )

static

Definition at line 15488 of file ExprConstant.cpp.

Referenced by CheckICE().