#include "clang/Sema/SemaInternal.h"
#include "clang/Sema/DelayedDiagnostic.h"
#include "clang/Sema/Initialization.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/AnalysisBasedWarnings.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/AST/CXXInheritance.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/EvaluatedExprVisitor.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/ExprObjC.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Basic/PartialDiagnostic.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Lex/LiteralSupport.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/DeclSpec.h"
#include "clang/Sema/Designator.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/ParsedTemplate.h"
#include "clang/Sema/SemaFixItUtils.h"
#include "clang/Sema/Template.h"
#include "TreeTransform.h"
using namespace clang;
using namespace sema;
bool Sema::CanUseDecl(NamedDecl *D) {
if (ParsingInitForAutoVars.count(D))
return false;
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
if (FD->isDeleted())
return false;
}
if (D->getAvailability() == AR_Unavailable &&
cast<Decl>(CurContext)->getAvailability() != AR_Unavailable)
return false;
return true;
}
static void DiagnoseUnusedOfDecl(Sema &S, NamedDecl *D, SourceLocation Loc) {
if (D->hasAttr<UnusedAttr>()) {
const Decl *DC = cast<Decl>(S.getCurObjCLexicalContext());
if (!DC->hasAttr<UnusedAttr>())
S.Diag(Loc, diag::warn_used_but_marked_unused) << D->getDeclName();
}
}
static AvailabilityResult DiagnoseAvailabilityOfDecl(Sema &S,
NamedDecl *D, SourceLocation Loc,
const ObjCInterfaceDecl *UnknownObjCClass) {
std::string Message;
AvailabilityResult Result = D->getAvailability(&Message);
if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D))
if (Result == AR_Available) {
const DeclContext *DC = ECD->getDeclContext();
if (const EnumDecl *TheEnumDecl = dyn_cast<EnumDecl>(DC))
Result = TheEnumDecl->getAvailability(&Message);
}
const ObjCPropertyDecl *ObjCPDecl = 0;
if (Result == AR_Deprecated || Result == AR_Unavailable) {
if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
if (const ObjCPropertyDecl *PD = MD->findPropertyDecl()) {
AvailabilityResult PDeclResult = PD->getAvailability(0);
if (PDeclResult == Result)
ObjCPDecl = PD;
}
}
}
switch (Result) {
case AR_Available:
case AR_NotYetIntroduced:
break;
case AR_Deprecated:
S.EmitDeprecationWarning(D, Message, Loc, UnknownObjCClass, ObjCPDecl);
break;
case AR_Unavailable:
if (S.getCurContextAvailability() != AR_Unavailable) {
if (Message.empty()) {
if (!UnknownObjCClass) {
S.Diag(Loc, diag::err_unavailable) << D->getDeclName();
if (ObjCPDecl)
S.Diag(ObjCPDecl->getLocation(), diag::note_property_attribute)
<< ObjCPDecl->getDeclName() << 1;
}
else
S.Diag(Loc, diag::warn_unavailable_fwdclass_message)
<< D->getDeclName();
}
else
S.Diag(Loc, diag::err_unavailable_message)
<< D->getDeclName() << Message;
S.Diag(D->getLocation(), diag::note_unavailable_here)
<< isa<FunctionDecl>(D) << false;
if (ObjCPDecl)
S.Diag(ObjCPDecl->getLocation(), diag::note_property_attribute)
<< ObjCPDecl->getDeclName() << 1;
}
break;
}
return Result;
}
void Sema::NoteDeletedFunction(FunctionDecl *Decl) {
CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Decl);
if (Method && Method->isDeleted() && !Method->isDeletedAsWritten()) {
if (!Method->isImplicit())
Diag(Decl->getLocation(), diag::note_implicitly_deleted);
CXXSpecialMember CSM = getSpecialMember(Method);
if (CSM != CXXInvalid)
ShouldDeleteSpecialMember(Method, CSM, true);
return;
}
Diag(Decl->getLocation(), diag::note_unavailable_here)
<< 1 << Decl->isDeleted();
}
static bool hasAnyExplicitStorageClass(const FunctionDecl *D) {
for (FunctionDecl::redecl_iterator I = D->redecls_begin(),
E = D->redecls_end();
I != E; ++I) {
if (I->getStorageClassAsWritten() != SC_None)
return true;
}
return false;
}
static void diagnoseUseOfInternalDeclInInlineFunction(Sema &S,
const NamedDecl *D,
SourceLocation Loc) {
if (S.getLangOpts().CPlusPlus)
return;
FunctionDecl *Current = S.getCurFunctionDecl();
if (!Current)
return;
if (!Current->isInlined())
return;
if (Current->getLinkage() != ExternalLinkage)
return;
if (D->getLinkage() != InternalLinkage)
return;
const FunctionDecl *UsedFn = dyn_cast<FunctionDecl>(D);
bool DowngradeWarning = S.getSourceManager().isFromMainFile(Loc);
if (!DowngradeWarning && UsedFn)
DowngradeWarning = UsedFn->isInlined() || UsedFn->hasAttr<ConstAttr>();
S.Diag(Loc, DowngradeWarning ? diag::ext_internal_in_extern_inline
: diag::warn_internal_in_extern_inline)
<< !UsedFn << D;
if (!hasAnyExplicitStorageClass(Current)) {
const FunctionDecl *FirstDecl = Current->getCanonicalDecl();
SourceLocation DeclBegin = FirstDecl->getSourceRange().getBegin();
S.Diag(DeclBegin, diag::note_convert_inline_to_static)
<< Current << FixItHint::CreateInsertion(DeclBegin, "static ");
}
S.Diag(D->getCanonicalDecl()->getLocation(),
diag::note_internal_decl_declared_here)
<< D;
}
bool Sema::DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
const ObjCInterfaceDecl *UnknownObjCClass) {
if (getLangOpts().CPlusPlus && isa<FunctionDecl>(D)) {
llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> >::iterator
Pos = SuppressedDiagnostics.find(D->getCanonicalDecl());
if (Pos != SuppressedDiagnostics.end()) {
SmallVectorImpl<PartialDiagnosticAt> &Suppressed = Pos->second;
for (unsigned I = 0, N = Suppressed.size(); I != N; ++I)
Diag(Suppressed[I].first, Suppressed[I].second);
Suppressed.clear();
}
}
if (ParsingInitForAutoVars.count(D)) {
Diag(Loc, diag::err_auto_variable_cannot_appear_in_own_initializer)
<< D->getDeclName();
return true;
}
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
if (FD->isDeleted()) {
Diag(Loc, diag::err_deleted_function_use);
NoteDeletedFunction(FD);
return true;
}
}
DiagnoseAvailabilityOfDecl(*this, D, Loc, UnknownObjCClass);
DiagnoseUnusedOfDecl(*this, D, Loc);
diagnoseUseOfInternalDeclInInlineFunction(*this, D, Loc);
return false;
}
std::string Sema::getDeletedOrUnavailableSuffix(const FunctionDecl *FD) {
if (FD->isDeleted())
return std::string();
std::string Message;
if (FD->getAvailability(&Message))
return ": " + Message;
return std::string();
}
void Sema::DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc,
Expr **args, unsigned numArgs) {
const SentinelAttr *attr = D->getAttr<SentinelAttr>();
if (!attr)
return;
unsigned numFormalParams;
enum CalleeType { CT_Function, CT_Method, CT_Block } calleeType;
if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
numFormalParams = MD->param_size();
calleeType = CT_Method;
} else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
numFormalParams = FD->param_size();
calleeType = CT_Function;
} else if (isa<VarDecl>(D)) {
QualType type = cast<ValueDecl>(D)->getType();
const FunctionType *fn = 0;
if (const PointerType *ptr = type->getAs<PointerType>()) {
fn = ptr->getPointeeType()->getAs<FunctionType>();
if (!fn) return;
calleeType = CT_Function;
} else if (const BlockPointerType *ptr = type->getAs<BlockPointerType>()) {
fn = ptr->getPointeeType()->castAs<FunctionType>();
calleeType = CT_Block;
} else {
return;
}
if (const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(fn)) {
numFormalParams = proto->getNumArgs();
} else {
numFormalParams = 0;
}
} else {
return;
}
unsigned nullPos = attr->getNullPos();
assert((nullPos == 0 || nullPos == 1) && "invalid null position on sentinel");
numFormalParams = (nullPos > numFormalParams ? 0 : numFormalParams - nullPos);
unsigned numArgsAfterSentinel = attr->getSentinel();
if (numArgs < numFormalParams + numArgsAfterSentinel + 1) {
Diag(Loc, diag::warn_not_enough_argument) << D->getDeclName();
Diag(D->getLocation(), diag::note_sentinel_here) << calleeType;
return;
}
Expr *sentinelExpr = args[numArgs - numArgsAfterSentinel - 1];
if (!sentinelExpr) return;
if (sentinelExpr->isValueDependent()) return;
if (Context.isSentinelNullExpr(sentinelExpr)) return;
SourceLocation MissingNilLoc
= PP.getLocForEndOfToken(sentinelExpr->getLocEnd());
std::string NullValue;
if (calleeType == CT_Method &&
PP.getIdentifierInfo("nil")->hasMacroDefinition())
NullValue = "nil";
else if (PP.getIdentifierInfo("NULL")->hasMacroDefinition())
NullValue = "NULL";
else
NullValue = "(void*) 0";
if (MissingNilLoc.isInvalid())
Diag(Loc, diag::warn_missing_sentinel) << calleeType;
else
Diag(MissingNilLoc, diag::warn_missing_sentinel)
<< calleeType
<< FixItHint::CreateInsertion(MissingNilLoc, ", " + NullValue);
Diag(D->getLocation(), diag::note_sentinel_here) << calleeType;
}
SourceRange Sema::getExprRange(Expr *E) const {
return E ? E->getSourceRange() : SourceRange();
}
ExprResult Sema::DefaultFunctionArrayConversion(Expr *E) {
if (E->getType()->isPlaceholderType()) {
ExprResult result = CheckPlaceholderExpr(E);
if (result.isInvalid()) return ExprError();
E = result.take();
}
QualType Ty = E->getType();
assert(!Ty.isNull() && "DefaultFunctionArrayConversion - missing type");
if (Ty->isFunctionType())
E = ImpCastExprToType(E, Context.getPointerType(Ty),
CK_FunctionToPointerDecay).take();
else if (Ty->isArrayType()) {
if (getLangOpts().C99 || getLangOpts().CPlusPlus || E->isLValue())
E = ImpCastExprToType(E, Context.getArrayDecayedType(Ty),
CK_ArrayToPointerDecay).take();
}
return Owned(E);
}
static void CheckForNullPointerDereference(Sema &S, Expr *E) {
if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E->IgnoreParenCasts()))
if (UO->getOpcode() == UO_Deref &&
UO->getSubExpr()->IgnoreParenCasts()->
isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull) &&
!UO->getType().isVolatileQualified()) {
S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO,
S.PDiag(diag::warn_indirection_through_null)
<< UO->getSubExpr()->getSourceRange());
S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO,
S.PDiag(diag::note_indirection_through_null));
}
}
ExprResult Sema::DefaultLvalueConversion(Expr *E) {
if (E->getType()->isPlaceholderType()) {
ExprResult result = CheckPlaceholderExpr(E);
if (result.isInvalid()) return ExprError();
E = result.take();
}
if (!E->isGLValue()) return Owned(E);
QualType T = E->getType();
assert(!T.isNull() && "r-value conversion on typeless expression?");
if (getLangOpts().CPlusPlus &&
(E->getType() == Context.OverloadTy ||
T->isDependentType() ||
T->isRecordType()))
return Owned(E);
if (T->isVoidType())
return Owned(E);
CheckForNullPointerDereference(*this, E);
if (T.hasQualifiers())
T = T.getUnqualifiedType();
UpdateMarkingForLValueToRValue(E);
ExprResult Res = Owned(ImplicitCastExpr::Create(Context, T, CK_LValueToRValue,
E, 0, VK_RValue));
if (const AtomicType *Atomic = T->getAs<AtomicType>()) {
T = Atomic->getValueType().getUnqualifiedType();
Res = Owned(ImplicitCastExpr::Create(Context, T, CK_AtomicToNonAtomic,
Res.get(), 0, VK_RValue));
}
return Res;
}
ExprResult Sema::DefaultFunctionArrayLvalueConversion(Expr *E) {
ExprResult Res = DefaultFunctionArrayConversion(E);
if (Res.isInvalid())
return ExprError();
Res = DefaultLvalueConversion(Res.take());
if (Res.isInvalid())
return ExprError();
return Res;
}
ExprResult Sema::UsualUnaryConversions(Expr *E) {
ExprResult Res = DefaultFunctionArrayLvalueConversion(E);
if (Res.isInvalid())
return Owned(E);
E = Res.take();
QualType Ty = E->getType();
assert(!Ty.isNull() && "UsualUnaryConversions - missing type");
if (Ty->isHalfType())
return ImpCastExprToType(Res.take(), Context.FloatTy, CK_FloatingCast);
if (Ty->isIntegralOrUnscopedEnumerationType()) {
QualType PTy = Context.isPromotableBitField(E);
if (!PTy.isNull()) {
E = ImpCastExprToType(E, PTy, CK_IntegralCast).take();
return Owned(E);
}
if (Ty->isPromotableIntegerType()) {
QualType PT = Context.getPromotedIntegerType(Ty);
E = ImpCastExprToType(E, PT, CK_IntegralCast).take();
return Owned(E);
}
}
return Owned(E);
}
ExprResult Sema::DefaultArgumentPromotion(Expr *E) {
QualType Ty = E->getType();
assert(!Ty.isNull() && "DefaultArgumentPromotion - missing type");
ExprResult Res = UsualUnaryConversions(E);
if (Res.isInvalid())
return Owned(E);
E = Res.take();
if (Ty->isSpecificBuiltinType(BuiltinType::Float))
E = ImpCastExprToType(E, Context.DoubleTy, CK_FloatingCast).take();
if (getLangOpts().CPlusPlus && E->isGLValue() && !isUnevaluatedContext()) {
ExprResult Temp = PerformCopyInitialization(
InitializedEntity::InitializeTemporary(E->getType()),
E->getExprLoc(),
Owned(E));
if (Temp.isInvalid())
return ExprError();
E = Temp.get();
}
return Owned(E);
}
Sema::VarArgKind Sema::isValidVarArgType(const QualType &Ty) {
if (Ty->isIncompleteType()) {
if (Ty->isObjCObjectType())
return VAK_Invalid;
return VAK_Valid;
}
if (Ty.isCXX98PODType(Context))
return VAK_Valid;
if (getLangOpts().CPlusPlus0x && !Ty->isDependentType())
if (CXXRecordDecl *Record = Ty->getAsCXXRecordDecl())
if (Record->hasTrivialCopyConstructor() &&
Record->hasTrivialMoveConstructor() &&
Record->hasTrivialDestructor())
return VAK_ValidInCXX11;
if (getLangOpts().ObjCAutoRefCount && Ty->isObjCLifetimeType())
return VAK_Valid;
return VAK_Invalid;
}
bool Sema::variadicArgumentPODCheck(const Expr *E, VariadicCallType CT) {
const QualType & Ty = E->getType();
switch (isValidVarArgType(Ty)) {
case VAK_Valid:
break;
case VAK_ValidInCXX11:
DiagRuntimeBehavior(E->getLocStart(), 0,
PDiag(diag::warn_cxx98_compat_pass_non_pod_arg_to_vararg)
<< E->getType() << CT);
break;
case VAK_Invalid: {
if (Ty->isObjCObjectType())
return DiagRuntimeBehavior(E->getLocStart(), 0,
PDiag(diag::err_cannot_pass_objc_interface_to_vararg)
<< Ty << CT);
return DiagRuntimeBehavior(E->getLocStart(), 0,
PDiag(diag::warn_cannot_pass_non_pod_arg_to_vararg)
<< getLangOpts().CPlusPlus0x << Ty << CT);
}
}
return false;
}
ExprResult Sema::DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT,
FunctionDecl *FDecl) {
if (const BuiltinType *PlaceholderTy = E->getType()->getAsPlaceholderType()) {
if (PlaceholderTy->getKind() == BuiltinType::ARCUnbridgedCast &&
(CT == VariadicMethod ||
(FDecl && FDecl->hasAttr<CFAuditedTransferAttr>()))) {
E = stripARCUnbridgedCast(E);
} else {
ExprResult ExprRes = CheckPlaceholderExpr(E);
if (ExprRes.isInvalid())
return ExprError();
E = ExprRes.take();
}
}
ExprResult ExprRes = DefaultArgumentPromotion(E);
if (ExprRes.isInvalid())
return ExprError();
E = ExprRes.take();
if (isValidVarArgType(E->getType()) == VAK_Invalid) {
CXXScopeSpec SS;
SourceLocation TemplateKWLoc;
UnqualifiedId Name;
Name.setIdentifier(PP.getIdentifierInfo("__builtin_trap"),
E->getLocStart());
ExprResult TrapFn = ActOnIdExpression(TUScope, SS, TemplateKWLoc,
Name, true, false);
if (TrapFn.isInvalid())
return ExprError();
ExprResult Call = ActOnCallExpr(TUScope, TrapFn.get(),
E->getLocStart(), MultiExprArg(),
E->getLocEnd());
if (Call.isInvalid())
return ExprError();
ExprResult Comma = ActOnBinOp(TUScope, E->getLocStart(), tok::comma,
Call.get(), E);
if (Comma.isInvalid())
return ExprError();
return Comma.get();
}
if (!getLangOpts().CPlusPlus &&
RequireCompleteType(E->getExprLoc(), E->getType(),
diag::err_call_incomplete_argument))
return ExprError();
return Owned(E);
}
static bool handleIntegerToComplexFloatConversion(Sema &S, ExprResult &IntExpr,
ExprResult &ComplexExpr,
QualType IntTy,
QualType ComplexTy,
bool SkipCast) {
if (IntTy->isComplexType() || IntTy->isRealFloatingType()) return true;
if (SkipCast) return false;
if (IntTy->isIntegerType()) {
QualType fpTy = cast<ComplexType>(ComplexTy)->getElementType();
IntExpr = S.ImpCastExprToType(IntExpr.take(), fpTy, CK_IntegralToFloating);
IntExpr = S.ImpCastExprToType(IntExpr.take(), ComplexTy,
CK_FloatingRealToComplex);
} else {
assert(IntTy->isComplexIntegerType());
IntExpr = S.ImpCastExprToType(IntExpr.take(), ComplexTy,
CK_IntegralComplexToFloatingComplex);
}
return false;
}
static QualType
handleComplexFloatToComplexFloatConverstion(Sema &S, ExprResult &LHS,
ExprResult &RHS, QualType LHSType,
QualType RHSType,
bool IsCompAssign) {
int order = S.Context.getFloatingTypeOrder(LHSType, RHSType);
if (order < 0) {
if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_FloatingComplexCast);
return RHSType;
}
if (order > 0)
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_FloatingComplexCast);
return LHSType;
}
static QualType handleOtherComplexFloatConversion(Sema &S,
ExprResult &ComplexExpr,
ExprResult &OtherExpr,
QualType ComplexTy,
QualType OtherTy,
bool ConvertComplexExpr,
bool ConvertOtherExpr) {
int order = S.Context.getFloatingTypeOrder(ComplexTy, OtherTy);
if (order > 0) { if (ConvertOtherExpr) {
QualType fp = cast<ComplexType>(ComplexTy)->getElementType();
OtherExpr = S.ImpCastExprToType(OtherExpr.take(), fp, CK_FloatingCast);
OtherExpr = S.ImpCastExprToType(OtherExpr.take(), ComplexTy,
CK_FloatingRealToComplex);
}
return ComplexTy;
}
QualType result = (order == 0 ? ComplexTy :
S.Context.getComplexType(OtherTy));
if (ConvertOtherExpr)
OtherExpr = S.ImpCastExprToType(OtherExpr.take(), result,
CK_FloatingRealToComplex);
if (ConvertComplexExpr && order < 0)
ComplexExpr = S.ImpCastExprToType(ComplexExpr.take(), result,
CK_FloatingComplexCast);
return result;
}
static QualType handleComplexFloatConversion(Sema &S, ExprResult &LHS,
ExprResult &RHS, QualType LHSType,
QualType RHSType,
bool IsCompAssign) {
if (!handleIntegerToComplexFloatConversion(S, RHS, LHS, RHSType, LHSType,
false))
return LHSType;
if (!handleIntegerToComplexFloatConversion(S, LHS, RHS, LHSType, RHSType,
IsCompAssign))
return RHSType;
bool LHSComplexFloat = LHSType->isComplexType();
bool RHSComplexFloat = RHSType->isComplexType();
if (LHSComplexFloat && RHSComplexFloat)
return handleComplexFloatToComplexFloatConverstion(S, LHS, RHS,
LHSType, RHSType,
IsCompAssign);
if (LHSComplexFloat)
return handleOtherComplexFloatConversion(
S, LHS, RHS, LHSType, RHSType, !IsCompAssign,
true);
assert(RHSComplexFloat);
return handleOtherComplexFloatConversion(
S, RHS, LHS, RHSType, LHSType, true,
!IsCompAssign);
}
static QualType handleIntToFloatConversion(Sema &S, ExprResult &FloatExpr,
ExprResult &IntExpr,
QualType FloatTy, QualType IntTy,
bool ConvertFloat, bool ConvertInt) {
if (IntTy->isIntegerType()) {
if (ConvertInt)
IntExpr = S.ImpCastExprToType(IntExpr.take(), FloatTy,
CK_IntegralToFloating);
return FloatTy;
}
assert(IntTy->isComplexIntegerType());
QualType result = S.Context.getComplexType(FloatTy);
if (ConvertInt)
IntExpr = S.ImpCastExprToType(IntExpr.take(), result,
CK_IntegralComplexToFloatingComplex);
if (ConvertFloat)
FloatExpr = S.ImpCastExprToType(FloatExpr.take(), result,
CK_FloatingRealToComplex);
return result;
}
static QualType handleFloatConversion(Sema &S, ExprResult &LHS,
ExprResult &RHS, QualType LHSType,
QualType RHSType, bool IsCompAssign) {
bool LHSFloat = LHSType->isRealFloatingType();
bool RHSFloat = RHSType->isRealFloatingType();
if (LHSFloat && RHSFloat) {
int order = S.Context.getFloatingTypeOrder(LHSType, RHSType);
if (order > 0) {
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_FloatingCast);
return LHSType;
}
assert(order < 0 && "illegal float comparison");
if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_FloatingCast);
return RHSType;
}
if (LHSFloat)
return handleIntToFloatConversion(S, LHS, RHS, LHSType, RHSType,
!IsCompAssign,
true);
assert(RHSFloat);
return handleIntToFloatConversion(S, RHS, LHS, RHSType, LHSType,
true,
!IsCompAssign);
}
static QualType handleComplexIntConversion(Sema &S, ExprResult &LHS,
ExprResult &RHS, QualType LHSType,
QualType RHSType,
bool IsCompAssign) {
const ComplexType *LHSComplexInt = LHSType->getAsComplexIntegerType();
const ComplexType *RHSComplexInt = RHSType->getAsComplexIntegerType();
if (LHSComplexInt && RHSComplexInt) {
int order = S.Context.getIntegerTypeOrder(LHSComplexInt->getElementType(),
RHSComplexInt->getElementType());
assert(order && "inequal types with equal element ordering");
if (order > 0) {
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_IntegralComplexCast);
return LHSType;
}
if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_IntegralComplexCast);
return RHSType;
}
if (LHSComplexInt) {
RHS = S.ImpCastExprToType(RHS.take(), LHSComplexInt->getElementType(),
CK_IntegralCast);
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_IntegralRealToComplex);
return LHSType;
}
assert(RHSComplexInt);
if (!IsCompAssign) {
LHS = S.ImpCastExprToType(LHS.take(), RHSComplexInt->getElementType(),
CK_IntegralCast);
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_IntegralRealToComplex);
}
return RHSType;
}
static QualType handleIntegerConversion(Sema &S, ExprResult &LHS,
ExprResult &RHS, QualType LHSType,
QualType RHSType, bool IsCompAssign) {
int order = S.Context.getIntegerTypeOrder(LHSType, RHSType);
bool LHSSigned = LHSType->hasSignedIntegerRepresentation();
bool RHSSigned = RHSType->hasSignedIntegerRepresentation();
if (LHSSigned == RHSSigned) {
if (order >= 0) {
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_IntegralCast);
return LHSType;
} else if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_IntegralCast);
return RHSType;
} else if (order != (LHSSigned ? 1 : -1)) {
if (RHSSigned) {
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_IntegralCast);
return LHSType;
} else if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_IntegralCast);
return RHSType;
} else if (S.Context.getIntWidth(LHSType) != S.Context.getIntWidth(RHSType)) {
if (LHSSigned) {
RHS = S.ImpCastExprToType(RHS.take(), LHSType, CK_IntegralCast);
return LHSType;
} else if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), RHSType, CK_IntegralCast);
return RHSType;
} else {
QualType result =
S.Context.getCorrespondingUnsignedType(LHSSigned ? LHSType : RHSType);
RHS = S.ImpCastExprToType(RHS.take(), result, CK_IntegralCast);
if (!IsCompAssign)
LHS = S.ImpCastExprToType(LHS.take(), result, CK_IntegralCast);
return result;
}
}
QualType Sema::UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS,
bool IsCompAssign) {
if (!IsCompAssign) {
LHS = UsualUnaryConversions(LHS.take());
if (LHS.isInvalid())
return QualType();
}
RHS = UsualUnaryConversions(RHS.take());
if (RHS.isInvalid())
return QualType();
QualType LHSType =
Context.getCanonicalType(LHS.get()->getType()).getUnqualifiedType();
QualType RHSType =
Context.getCanonicalType(RHS.get()->getType()).getUnqualifiedType();
if (const AtomicType *AtomicLHS = LHSType->getAs<AtomicType>())
LHSType = AtomicLHS->getValueType();
if (LHSType == RHSType)
return LHSType;
if (!LHSType->isArithmeticType() || !RHSType->isArithmeticType())
return QualType();
QualType LHSUnpromotedType = LHSType;
if (LHSType->isPromotableIntegerType())
LHSType = Context.getPromotedIntegerType(LHSType);
QualType LHSBitfieldPromoteTy = Context.isPromotableBitField(LHS.get());
if (!LHSBitfieldPromoteTy.isNull())
LHSType = LHSBitfieldPromoteTy;
if (LHSType != LHSUnpromotedType && !IsCompAssign)
LHS = ImpCastExprToType(LHS.take(), LHSType, CK_IntegralCast);
if (LHSType == RHSType)
return LHSType;
if (LHSType->isComplexType() || RHSType->isComplexType())
return handleComplexFloatConversion(*this, LHS, RHS, LHSType, RHSType,
IsCompAssign);
if (LHSType->isRealFloatingType() || RHSType->isRealFloatingType())
return handleFloatConversion(*this, LHS, RHS, LHSType, RHSType,
IsCompAssign);
if (LHSType->isComplexIntegerType() || RHSType->isComplexIntegerType())
return handleComplexIntConversion(*this, LHS, RHS, LHSType, RHSType,
IsCompAssign);
return handleIntegerConversion(*this, LHS, RHS, LHSType, RHSType,
IsCompAssign);
}
ExprResult
Sema::ActOnGenericSelectionExpr(SourceLocation KeyLoc,
SourceLocation DefaultLoc,
SourceLocation RParenLoc,
Expr *ControllingExpr,
MultiTypeArg ArgTypes,
MultiExprArg ArgExprs) {
unsigned NumAssocs = ArgTypes.size();
assert(NumAssocs == ArgExprs.size());
ParsedType *ParsedTypes = ArgTypes.data();
Expr **Exprs = ArgExprs.data();
TypeSourceInfo **Types = new TypeSourceInfo*[NumAssocs];
for (unsigned i = 0; i < NumAssocs; ++i) {
if (ParsedTypes[i])
(void) GetTypeFromParser(ParsedTypes[i], &Types[i]);
else
Types[i] = 0;
}
ExprResult ER = CreateGenericSelectionExpr(KeyLoc, DefaultLoc, RParenLoc,
ControllingExpr, Types, Exprs,
NumAssocs);
delete [] Types;
return ER;
}
ExprResult
Sema::CreateGenericSelectionExpr(SourceLocation KeyLoc,
SourceLocation DefaultLoc,
SourceLocation RParenLoc,
Expr *ControllingExpr,
TypeSourceInfo **Types,
Expr **Exprs,
unsigned NumAssocs) {
bool TypeErrorFound = false,
IsResultDependent = ControllingExpr->isTypeDependent(),
ContainsUnexpandedParameterPack
= ControllingExpr->containsUnexpandedParameterPack();
for (unsigned i = 0; i < NumAssocs; ++i) {
if (Exprs[i]->containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
if (Types[i]) {
if (Types[i]->getType()->containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
if (Types[i]->getType()->isDependentType()) {
IsResultDependent = true;
} else {
unsigned D = 0;
if (Types[i]->getType()->isIncompleteType())
D = diag::err_assoc_type_incomplete;
else if (!Types[i]->getType()->isObjectType())
D = diag::err_assoc_type_nonobject;
else if (Types[i]->getType()->isVariablyModifiedType())
D = diag::err_assoc_type_variably_modified;
if (D != 0) {
Diag(Types[i]->getTypeLoc().getBeginLoc(), D)
<< Types[i]->getTypeLoc().getSourceRange()
<< Types[i]->getType();
TypeErrorFound = true;
}
for (unsigned j = i+1; j < NumAssocs; ++j)
if (Types[j] && !Types[j]->getType()->isDependentType() &&
Context.typesAreCompatible(Types[i]->getType(),
Types[j]->getType())) {
Diag(Types[j]->getTypeLoc().getBeginLoc(),
diag::err_assoc_compatible_types)
<< Types[j]->getTypeLoc().getSourceRange()
<< Types[j]->getType()
<< Types[i]->getType();
Diag(Types[i]->getTypeLoc().getBeginLoc(),
diag::note_compat_assoc)
<< Types[i]->getTypeLoc().getSourceRange()
<< Types[i]->getType();
TypeErrorFound = true;
}
}
}
}
if (TypeErrorFound)
return ExprError();
if (IsResultDependent)
return Owned(new (Context) GenericSelectionExpr(
Context, KeyLoc, ControllingExpr,
llvm::makeArrayRef(Types, NumAssocs),
llvm::makeArrayRef(Exprs, NumAssocs),
DefaultLoc, RParenLoc, ContainsUnexpandedParameterPack));
SmallVector<unsigned, 1> CompatIndices;
unsigned DefaultIndex = -1U;
for (unsigned i = 0; i < NumAssocs; ++i) {
if (!Types[i])
DefaultIndex = i;
else if (Context.typesAreCompatible(ControllingExpr->getType(),
Types[i]->getType()))
CompatIndices.push_back(i);
}
if (CompatIndices.size() > 1) {
ControllingExpr = ControllingExpr->IgnoreParens();
Diag(ControllingExpr->getLocStart(), diag::err_generic_sel_multi_match)
<< ControllingExpr->getSourceRange() << ControllingExpr->getType()
<< (unsigned) CompatIndices.size();
for (SmallVector<unsigned, 1>::iterator I = CompatIndices.begin(),
E = CompatIndices.end(); I != E; ++I) {
Diag(Types[*I]->getTypeLoc().getBeginLoc(),
diag::note_compat_assoc)
<< Types[*I]->getTypeLoc().getSourceRange()
<< Types[*I]->getType();
}
return ExprError();
}
if (DefaultIndex == -1U && CompatIndices.size() == 0) {
ControllingExpr = ControllingExpr->IgnoreParens();
Diag(ControllingExpr->getLocStart(), diag::err_generic_sel_no_match)
<< ControllingExpr->getSourceRange() << ControllingExpr->getType();
return ExprError();
}
unsigned ResultIndex =
CompatIndices.size() ? CompatIndices[0] : DefaultIndex;
return Owned(new (Context) GenericSelectionExpr(
Context, KeyLoc, ControllingExpr,
llvm::makeArrayRef(Types, NumAssocs),
llvm::makeArrayRef(Exprs, NumAssocs),
DefaultLoc, RParenLoc, ContainsUnexpandedParameterPack,
ResultIndex));
}
static SourceLocation getUDSuffixLoc(Sema &S, SourceLocation TokLoc,
unsigned Offset) {
return Lexer::AdvanceToTokenCharacter(TokLoc, Offset, S.getSourceManager(),
S.getLangOpts());
}
static ExprResult BuildCookedLiteralOperatorCall(Sema &S, Scope *Scope,
IdentifierInfo *UDSuffix,
SourceLocation UDSuffixLoc,
ArrayRef<Expr*> Args,
SourceLocation LitEndLoc) {
assert(Args.size() <= 2 && "too many arguments for literal operator");
QualType ArgTy[2];
for (unsigned ArgIdx = 0; ArgIdx != Args.size(); ++ArgIdx) {
ArgTy[ArgIdx] = Args[ArgIdx]->getType();
if (ArgTy[ArgIdx]->isArrayType())
ArgTy[ArgIdx] = S.Context.getArrayDecayedType(ArgTy[ArgIdx]);
}
DeclarationName OpName =
S.Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix);
DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc);
OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc);
LookupResult R(S, OpName, UDSuffixLoc, Sema::LookupOrdinaryName);
if (S.LookupLiteralOperator(Scope, R, llvm::makeArrayRef(ArgTy, Args.size()),
false) == Sema::LOLR_Error)
return ExprError();
return S.BuildLiteralOperatorCall(R, OpNameInfo, Args, LitEndLoc);
}
ExprResult
Sema::ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks,
Scope *UDLScope) {
assert(NumStringToks && "Must have at least one string!");
StringLiteralParser Literal(StringToks, NumStringToks, PP);
if (Literal.hadError)
return ExprError();
SmallVector<SourceLocation, 4> StringTokLocs;
for (unsigned i = 0; i != NumStringToks; ++i)
StringTokLocs.push_back(StringToks[i].getLocation());
QualType StrTy = Context.CharTy;
if (Literal.isWide())
StrTy = Context.getWCharType();
else if (Literal.isUTF16())
StrTy = Context.Char16Ty;
else if (Literal.isUTF32())
StrTy = Context.Char32Ty;
else if (Literal.isPascal())
StrTy = Context.UnsignedCharTy;
StringLiteral::StringKind Kind = StringLiteral::Ascii;
if (Literal.isWide())
Kind = StringLiteral::Wide;
else if (Literal.isUTF8())
Kind = StringLiteral::UTF8;
else if (Literal.isUTF16())
Kind = StringLiteral::UTF16;
else if (Literal.isUTF32())
Kind = StringLiteral::UTF32;
if (getLangOpts().CPlusPlus || getLangOpts().ConstStrings)
StrTy.addConst();
StrTy = Context.getConstantArrayType(StrTy,
llvm::APInt(32, Literal.GetNumStringChars()+1),
ArrayType::Normal, 0);
StringLiteral *Lit = StringLiteral::Create(Context, Literal.GetString(),
Kind, Literal.Pascal, StrTy,
&StringTokLocs[0],
StringTokLocs.size());
if (Literal.getUDSuffix().empty())
return Owned(Lit);
IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix());
SourceLocation UDSuffixLoc =
getUDSuffixLoc(*this, StringTokLocs[Literal.getUDSuffixToken()],
Literal.getUDSuffixOffset());
if (!UDLScope)
return ExprError(Diag(UDSuffixLoc, diag::err_invalid_string_udl));
QualType SizeType = Context.getSizeType();
llvm::APInt Len(Context.getIntWidth(SizeType), Literal.GetNumStringChars());
IntegerLiteral *LenArg = IntegerLiteral::Create(Context, Len, SizeType,
StringTokLocs[0]);
Expr *Args[] = { Lit, LenArg };
return BuildCookedLiteralOperatorCall(*this, UDLScope, UDSuffix, UDSuffixLoc,
Args, StringTokLocs.back());
}
ExprResult
Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK,
SourceLocation Loc,
const CXXScopeSpec *SS) {
DeclarationNameInfo NameInfo(D->getDeclName(), Loc);
return BuildDeclRefExpr(D, Ty, VK, NameInfo, SS);
}
ExprResult
Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK,
const DeclarationNameInfo &NameInfo,
const CXXScopeSpec *SS) {
if (getLangOpts().CUDA)
if (const FunctionDecl *Caller = dyn_cast<FunctionDecl>(CurContext))
if (const FunctionDecl *Callee = dyn_cast<FunctionDecl>(D)) {
CUDAFunctionTarget CallerTarget = IdentifyCUDATarget(Caller),
CalleeTarget = IdentifyCUDATarget(Callee);
if (CheckCUDATarget(CallerTarget, CalleeTarget)) {
Diag(NameInfo.getLoc(), diag::err_ref_bad_target)
<< CalleeTarget << D->getIdentifier() << CallerTarget;
Diag(D->getLocation(), diag::note_previous_decl)
<< D->getIdentifier();
return ExprError();
}
}
bool refersToEnclosingScope =
(CurContext != D->getDeclContext() &&
D->getDeclContext()->isFunctionOrMethod());
DeclRefExpr *E = DeclRefExpr::Create(Context,
SS ? SS->getWithLocInContext(Context)
: NestedNameSpecifierLoc(),
SourceLocation(),
D, refersToEnclosingScope,
NameInfo, Ty, VK);
MarkDeclRefReferenced(E);
if (getLangOpts().ObjCARCWeak && isa<VarDecl>(D) &&
Ty.getObjCLifetime() == Qualifiers::OCL_Weak) {
DiagnosticsEngine::Level Level =
Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
E->getLocStart());
if (Level != DiagnosticsEngine::Ignored)
getCurFunction()->recordUseOfWeak(E);
}
FieldDecl *FD = dyn_cast<FieldDecl>(D);
if (FD && FD->isBitField())
E->setObjectKind(OK_BitField);
return Owned(E);
}
void
Sema::DecomposeUnqualifiedId(const UnqualifiedId &Id,
TemplateArgumentListInfo &Buffer,
DeclarationNameInfo &NameInfo,
const TemplateArgumentListInfo *&TemplateArgs) {
if (Id.getKind() == UnqualifiedId::IK_TemplateId) {
Buffer.setLAngleLoc(Id.TemplateId->LAngleLoc);
Buffer.setRAngleLoc(Id.TemplateId->RAngleLoc);
ASTTemplateArgsPtr TemplateArgsPtr(Id.TemplateId->getTemplateArgs(),
Id.TemplateId->NumArgs);
translateTemplateArguments(TemplateArgsPtr, Buffer);
TemplateName TName = Id.TemplateId->Template.get();
SourceLocation TNameLoc = Id.TemplateId->TemplateNameLoc;
NameInfo = Context.getNameForTemplate(TName, TNameLoc);
TemplateArgs = &Buffer;
} else {
NameInfo = GetNameFromUnqualifiedId(Id);
TemplateArgs = 0;
}
}
bool Sema::DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
CorrectionCandidateCallback &CCC,
TemplateArgumentListInfo *ExplicitTemplateArgs,
llvm::ArrayRef<Expr *> Args) {
DeclarationName Name = R.getLookupName();
unsigned diagnostic = diag::err_undeclared_var_use;
unsigned diagnostic_suggest = diag::err_undeclared_var_use_suggest;
if (Name.getNameKind() == DeclarationName::CXXOperatorName ||
Name.getNameKind() == DeclarationName::CXXLiteralOperatorName ||
Name.getNameKind() == DeclarationName::CXXConversionFunctionName) {
diagnostic = diag::err_undeclared_use;
diagnostic_suggest = diag::err_undeclared_use_suggest;
}
DeclContext *DC = (SS.isEmpty() && !CallsUndergoingInstantiation.empty())
? CurContext : 0;
while (DC) {
if (isa<CXXRecordDecl>(DC)) {
LookupQualifiedName(R, DC);
if (!R.empty()) {
R.suppressDiagnostics();
bool isDefaultArgument = !ActiveTemplateInstantiations.empty() &&
ActiveTemplateInstantiations.back().Kind ==
ActiveTemplateInstantiation::DefaultFunctionArgumentInstantiation;
CXXMethodDecl *CurMethod = dyn_cast<CXXMethodDecl>(CurContext);
bool isInstance = CurMethod &&
CurMethod->isInstance() &&
DC == CurMethod->getParent() && !isDefaultArgument;
if (getLangOpts().MicrosoftMode)
diagnostic = diag::warn_found_via_dependent_bases_lookup;
if (isInstance) {
Diag(R.getNameLoc(), diagnostic) << Name
<< FixItHint::CreateInsertion(R.getNameLoc(), "this->");
UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(
CallsUndergoingInstantiation.back()->getCallee());
CXXMethodDecl *DepMethod;
if (CurMethod->getTemplatedKind() ==
FunctionDecl::TK_FunctionTemplateSpecialization)
DepMethod = cast<CXXMethodDecl>(CurMethod->getPrimaryTemplate()->
getInstantiatedFromMemberTemplate()->getTemplatedDecl());
else
DepMethod = cast<CXXMethodDecl>(
CurMethod->getInstantiatedFromMemberFunction());
assert(DepMethod && "No template pattern found");
QualType DepThisType = DepMethod->getThisType(Context);
CheckCXXThisCapture(R.getNameLoc());
CXXThisExpr *DepThis = new (Context) CXXThisExpr(
R.getNameLoc(), DepThisType, false);
TemplateArgumentListInfo TList;
if (ULE->hasExplicitTemplateArgs())
ULE->copyTemplateArgumentsInto(TList);
CXXScopeSpec SS;
SS.Adopt(ULE->getQualifierLoc());
CXXDependentScopeMemberExpr *DepExpr =
CXXDependentScopeMemberExpr::Create(
Context, DepThis, DepThisType, true, SourceLocation(),
SS.getWithLocInContext(Context),
ULE->getTemplateKeywordLoc(), 0,
R.getLookupNameInfo(),
ULE->hasExplicitTemplateArgs() ? &TList : 0);
CallsUndergoingInstantiation.back()->setCallee(DepExpr);
} else {
Diag(R.getNameLoc(), diagnostic) << Name;
}
for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I)
Diag((*I)->getLocation(), diag::note_dependent_var_use);
if (isDefaultArgument && ((*R.begin())->isCXXInstanceMember())) {
Diag(R.getNameLoc(), diag::err_member_call_without_object);
return true;
}
return false;
}
R.clear();
}
if (getLangOpts().MicrosoftMode && isa<FunctionDecl>(DC) &&
cast<FunctionDecl>(DC)->getFriendObjectKind() &&
DC->getLexicalParent()->isRecord())
DC = DC->getLexicalParent();
else
DC = DC->getParent();
}
TypoCorrection Corrected;
if (S && (Corrected = CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(),
S, &SS, CCC))) {
std::string CorrectedStr(Corrected.getAsString(getLangOpts()));
std::string CorrectedQuotedStr(Corrected.getQuoted(getLangOpts()));
R.setLookupName(Corrected.getCorrection());
if (NamedDecl *ND = Corrected.getCorrectionDecl()) {
if (Corrected.isOverloaded()) {
OverloadCandidateSet OCS(R.getNameLoc());
OverloadCandidateSet::iterator Best;
for (TypoCorrection::decl_iterator CD = Corrected.begin(),
CDEnd = Corrected.end();
CD != CDEnd; ++CD) {
if (FunctionTemplateDecl *FTD =
dyn_cast<FunctionTemplateDecl>(*CD))
AddTemplateOverloadCandidate(
FTD, DeclAccessPair::make(FTD, AS_none), ExplicitTemplateArgs,
Args, OCS);
else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(*CD))
if (!ExplicitTemplateArgs || ExplicitTemplateArgs->size() == 0)
AddOverloadCandidate(FD, DeclAccessPair::make(FD, AS_none),
Args, OCS);
}
switch (OCS.BestViableFunction(*this, R.getNameLoc(), Best)) {
case OR_Success:
ND = Best->Function;
break;
default:
break;
}
}
R.addDecl(ND);
if (isa<ValueDecl>(ND) || isa<FunctionTemplateDecl>(ND)) {
if (SS.isEmpty())
Diag(R.getNameLoc(), diagnostic_suggest) << Name << CorrectedQuotedStr
<< FixItHint::CreateReplacement(R.getNameLoc(), CorrectedStr);
else
Diag(R.getNameLoc(), diag::err_no_member_suggest)
<< Name << computeDeclContext(SS, false) << CorrectedQuotedStr
<< SS.getRange()
<< FixItHint::CreateReplacement(R.getNameLoc(), CorrectedStr);
if (ND)
Diag(ND->getLocation(), diag::note_previous_decl)
<< CorrectedQuotedStr;
return false;
}
if (isa<TypeDecl>(ND) || isa<ObjCInterfaceDecl>(ND)) {
if (SS.isEmpty())
Diag(R.getNameLoc(), diagnostic_suggest)
<< Name << CorrectedQuotedStr;
else
Diag(R.getNameLoc(), diag::err_no_member_suggest)
<< Name << computeDeclContext(SS, false) << CorrectedQuotedStr
<< SS.getRange();
return true;
}
} else {
if (SS.isEmpty())
Diag(R.getNameLoc(), diagnostic_suggest) << Name << CorrectedQuotedStr;
else
Diag(R.getNameLoc(), diag::err_no_member_suggest)
<< Name << computeDeclContext(SS, false) << CorrectedQuotedStr
<< SS.getRange();
return true;
}
}
R.clear();
if (!SS.isEmpty()) {
Diag(R.getNameLoc(), diag::err_no_member)
<< Name << computeDeclContext(SS, false)
<< SS.getRange();
return true;
}
Diag(R.getNameLoc(), diagnostic) << Name;
return true;
}
ExprResult Sema::ActOnIdExpression(Scope *S,
CXXScopeSpec &SS,
SourceLocation TemplateKWLoc,
UnqualifiedId &Id,
bool HasTrailingLParen,
bool IsAddressOfOperand,
CorrectionCandidateCallback *CCC) {
assert(!(IsAddressOfOperand && HasTrailingLParen) &&
"cannot be direct & operand and have a trailing lparen");
if (SS.isInvalid())
return ExprError();
TemplateArgumentListInfo TemplateArgsBuffer;
DeclarationNameInfo NameInfo;
const TemplateArgumentListInfo *TemplateArgs;
DecomposeUnqualifiedId(Id, TemplateArgsBuffer, NameInfo, TemplateArgs);
DeclarationName Name = NameInfo.getName();
IdentifierInfo *II = Name.getAsIdentifierInfo();
SourceLocation NameLoc = NameInfo.getLoc();
bool DependentID = false;
if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName &&
Name.getCXXNameType()->isDependentType()) {
DependentID = true;
} else if (SS.isSet()) {
if (DeclContext *DC = computeDeclContext(SS, false)) {
if (RequireCompleteDeclContext(SS, DC))
return ExprError();
} else {
DependentID = true;
}
}
if (DependentID)
return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
IsAddressOfOperand, TemplateArgs);
LookupResult R(*this, NameInfo,
(Id.getKind() == UnqualifiedId::IK_ImplicitSelfParam)
? LookupObjCImplicitSelfParam : LookupOrdinaryName);
if (TemplateArgs) {
bool MemberOfUnknownSpecialization;
LookupTemplateName(R, S, SS, QualType(), false,
MemberOfUnknownSpecialization);
if (MemberOfUnknownSpecialization ||
(R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation))
return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
IsAddressOfOperand, TemplateArgs);
} else {
bool IvarLookupFollowUp = II && !SS.isSet() && getCurMethodDecl();
LookupParsedName(R, S, &SS, !IvarLookupFollowUp);
if (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation)
return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
IsAddressOfOperand, TemplateArgs);
if (IvarLookupFollowUp) {
ExprResult E(LookupInObjCMethod(R, S, II, true));
if (E.isInvalid())
return ExprError();
if (Expr *Ex = E.takeAs<Expr>())
return Owned(Ex);
}
}
if (R.isAmbiguous())
return ExprError();
bool ADL = UseArgumentDependentLookup(SS, R, HasTrailingLParen);
if (R.empty() && !ADL) {
if (HasTrailingLParen && II && !getLangOpts().CPlusPlus) {
NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *II, S);
if (D) R.addDecl(D);
}
if (R.empty()) {
if (getLangOpts().MicrosoftMode && CurContext->isDependentContext() &&
isa<CXXMethodDecl>(CurContext))
return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
IsAddressOfOperand, TemplateArgs);
CorrectionCandidateCallback DefaultValidator;
if (DiagnoseEmptyLookup(S, SS, R, CCC ? *CCC : DefaultValidator))
return ExprError();
assert(!R.empty() &&
"DiagnoseEmptyLookup returned false but added no results");
if (ObjCIvarDecl *Ivar = R.getAsSingle<ObjCIvarDecl>()) {
R.clear();
ExprResult E(LookupInObjCMethod(R, S, Ivar->getIdentifier()));
if (!E.isInvalid() && !E.get())
return ExprError();
return E;
}
}
}
assert(!R.empty() || ADL);
if (!R.empty() && (*R.begin())->isCXXClassMember()) {
bool MightBeImplicitMember;
if (!IsAddressOfOperand)
MightBeImplicitMember = true;
else if (!SS.isEmpty())
MightBeImplicitMember = false;
else if (R.isOverloadedResult())
MightBeImplicitMember = false;
else if (R.isUnresolvableResult())
MightBeImplicitMember = true;
else
MightBeImplicitMember = isa<FieldDecl>(R.getFoundDecl()) ||
isa<IndirectFieldDecl>(R.getFoundDecl());
if (MightBeImplicitMember)
return BuildPossibleImplicitMemberExpr(SS, TemplateKWLoc,
R, TemplateArgs);
}
if (TemplateArgs || TemplateKWLoc.isValid())
return BuildTemplateIdExpr(SS, TemplateKWLoc, R, ADL, TemplateArgs);
return BuildDeclarationNameExpr(SS, R, ADL);
}
ExprResult
Sema::BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
const DeclarationNameInfo &NameInfo) {
DeclContext *DC;
if (!(DC = computeDeclContext(SS, false)) || DC->isDependentContext())
return BuildDependentDeclRefExpr(SS, SourceLocation(),
NameInfo, 0);
if (RequireCompleteDeclContext(SS, DC))
return ExprError();
LookupResult R(*this, NameInfo, LookupOrdinaryName);
LookupQualifiedName(R, DC);
if (R.isAmbiguous())
return ExprError();
if (R.empty()) {
Diag(NameInfo.getLoc(), diag::err_no_member)
<< NameInfo.getName() << DC << SS.getRange();
return ExprError();
}
return BuildDeclarationNameExpr(SS, R, false);
}
ExprResult
Sema::LookupInObjCMethod(LookupResult &Lookup, Scope *S,
IdentifierInfo *II, bool AllowBuiltinCreation) {
SourceLocation Loc = Lookup.getNameLoc();
ObjCMethodDecl *CurMethod = getCurMethodDecl();
bool IsClassMethod = CurMethod->isClassMethod();
bool LookForIvars;
if (Lookup.empty())
LookForIvars = true;
else if (IsClassMethod)
LookForIvars = false;
else
LookForIvars = (Lookup.isSingleResult() &&
Lookup.getFoundDecl()->isDefinedOutsideFunctionOrMethod());
ObjCInterfaceDecl *IFace = 0;
if (LookForIvars) {
IFace = CurMethod->getClassInterface();
ObjCInterfaceDecl *ClassDeclared;
ObjCIvarDecl *IV = 0;
if (IFace && (IV = IFace->lookupInstanceVariable(II, ClassDeclared))) {
if (IsClassMethod)
return ExprError(Diag(Loc, diag::error_ivar_use_in_class_method)
<< IV->getDeclName());
if (IV->isInvalidDecl())
return ExprError();
if (DiagnoseUseOfDecl(IV, Loc))
return ExprError();
if (IV->getAccessControl() == ObjCIvarDecl::Private &&
!declaresSameEntity(ClassDeclared, IFace) &&
!getLangOpts().DebuggerSupport)
Diag(Loc, diag::error_private_ivar_access) << IV->getDeclName();
IdentifierInfo &II = Context.Idents.get("self");
UnqualifiedId SelfName;
SelfName.setIdentifier(&II, SourceLocation());
SelfName.setKind(UnqualifiedId::IK_ImplicitSelfParam);
CXXScopeSpec SelfScopeSpec;
SourceLocation TemplateKWLoc;
ExprResult SelfExpr = ActOnIdExpression(S, SelfScopeSpec, TemplateKWLoc,
SelfName, false, false);
if (SelfExpr.isInvalid())
return ExprError();
SelfExpr = DefaultLvalueConversion(SelfExpr.take());
if (SelfExpr.isInvalid())
return ExprError();
MarkAnyDeclReferenced(Loc, IV);
ObjCMethodFamily MF = CurMethod->getMethodFamily();
if (MF != OMF_init && MF != OMF_dealloc && MF != OMF_finalize)
Diag(Loc, diag::warn_direct_ivar_access) << IV->getDeclName();
ObjCIvarRefExpr *Result = new (Context) ObjCIvarRefExpr(IV, IV->getType(),
Loc,
SelfExpr.take(),
true, true);
if (getLangOpts().ObjCAutoRefCount) {
if (IV->getType().getObjCLifetime() == Qualifiers::OCL_Weak) {
DiagnosticsEngine::Level Level =
Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak, Loc);
if (Level != DiagnosticsEngine::Ignored)
getCurFunction()->recordUseOfWeak(Result);
}
if (CurContext->isClosure())
Diag(Loc, diag::warn_implicitly_retains_self)
<< FixItHint::CreateInsertion(Loc, "self->");
}
return Owned(Result);
}
} else if (CurMethod->isInstanceMethod()) {
if (ObjCInterfaceDecl *IFace = CurMethod->getClassInterface()) {
ObjCInterfaceDecl *ClassDeclared;
if (ObjCIvarDecl *IV = IFace->lookupInstanceVariable(II, ClassDeclared)) {
if (IV->getAccessControl() != ObjCIvarDecl::Private ||
declaresSameEntity(IFace, ClassDeclared))
Diag(Loc, diag::warn_ivar_use_hidden) << IV->getDeclName();
}
}
} else if (Lookup.isSingleResult() &&
Lookup.getFoundDecl()->isDefinedOutsideFunctionOrMethod()) {
if (const ObjCIvarDecl *IV = dyn_cast<ObjCIvarDecl>(Lookup.getFoundDecl()))
return ExprError(Diag(Loc, diag::error_ivar_use_in_class_method)
<< IV->getDeclName());
}
if (Lookup.empty() && II && AllowBuiltinCreation) {
if (unsigned BuiltinID = II->getBuiltinID()) {
if (!(getLangOpts().CPlusPlus &&
Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))) {
NamedDecl *D = LazilyCreateBuiltin((IdentifierInfo *)II, BuiltinID,
S, Lookup.isForRedeclaration(),
Lookup.getNameLoc());
if (D) Lookup.addDecl(D);
}
}
}
return Owned((Expr*) 0);
}
ExprResult
Sema::PerformObjectMemberConversion(Expr *From,
NestedNameSpecifier *Qualifier,
NamedDecl *FoundDecl,
NamedDecl *Member) {
CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Member->getDeclContext());
if (!RD)
return Owned(From);
QualType DestRecordType;
QualType DestType;
QualType FromRecordType;
QualType FromType = From->getType();
bool PointerConversions = false;
if (isa<FieldDecl>(Member)) {
DestRecordType = Context.getCanonicalType(Context.getTypeDeclType(RD));
if (FromType->getAs<PointerType>()) {
DestType = Context.getPointerType(DestRecordType);
FromRecordType = FromType->getPointeeType();
PointerConversions = true;
} else {
DestType = DestRecordType;
FromRecordType = FromType;
}
} else if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Member)) {
if (Method->isStatic())
return Owned(From);
DestType = Method->getThisType(Context);
DestRecordType = DestType->getPointeeType();
if (FromType->getAs<PointerType>()) {
FromRecordType = FromType->getPointeeType();
PointerConversions = true;
} else {
FromRecordType = FromType;
DestType = DestRecordType;
}
} else {
return Owned(From);
}
if (DestType->isDependentType() || FromType->isDependentType())
return Owned(From);
if (Context.hasSameUnqualifiedType(FromRecordType, DestRecordType))
return Owned(From);
SourceRange FromRange = From->getSourceRange();
SourceLocation FromLoc = FromRange.getBegin();
ExprValueKind VK = From->getValueKind();
if (Qualifier) {
QualType QType = QualType(Qualifier->getAsType(), 0);
assert(!QType.isNull() && "lookup done with dependent qualifier?");
assert(QType->isRecordType() && "lookup done with non-record type");
QualType QRecordType = QualType(QType->getAs<RecordType>(), 0);
if (IsDerivedFrom(FromRecordType, QRecordType)) {
CXXCastPath BasePath;
if (CheckDerivedToBaseConversion(FromRecordType, QRecordType,
FromLoc, FromRange, &BasePath))
return ExprError();
if (PointerConversions)
QType = Context.getPointerType(QType);
From = ImpCastExprToType(From, QType, CK_UncheckedDerivedToBase,
VK, &BasePath).take();
FromType = QType;
FromRecordType = QRecordType;
if (Context.hasSameUnqualifiedType(FromRecordType, DestRecordType))
return Owned(From);
}
}
bool IgnoreAccess = false;
if (FoundDecl->getDeclContext() != Member->getDeclContext()) {
assert(isa<UsingShadowDecl>(FoundDecl));
QualType URecordType = Context.getTypeDeclType(
cast<CXXRecordDecl>(FoundDecl->getDeclContext()));
if (!Context.hasSameUnqualifiedType(FromRecordType, URecordType)) {
assert(IsDerivedFrom(FromRecordType, URecordType));
CXXCastPath BasePath;
if (CheckDerivedToBaseConversion(FromRecordType, URecordType,
FromLoc, FromRange, &BasePath))
return ExprError();
QualType UType = URecordType;
if (PointerConversions)
UType = Context.getPointerType(UType);
From = ImpCastExprToType(From, UType, CK_UncheckedDerivedToBase,
VK, &BasePath).take();
FromType = UType;
FromRecordType = URecordType;
}
IgnoreAccess = true;
}
CXXCastPath BasePath;
if (CheckDerivedToBaseConversion(FromRecordType, DestRecordType,
FromLoc, FromRange, &BasePath,
IgnoreAccess))
return ExprError();
return ImpCastExprToType(From, DestType, CK_UncheckedDerivedToBase,
VK, &BasePath);
}
bool Sema::UseArgumentDependentLookup(const CXXScopeSpec &SS,
const LookupResult &R,
bool HasTrailingLParen) {
if (!HasTrailingLParen)
return false;
if (SS.isSet())
return false;
if (!getLangOpts().CPlusPlus)
return false;
for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) {
NamedDecl *D = *I;
if (D->isCXXClassMember())
return false;
if (isa<UsingShadowDecl>(D))
D = cast<UsingShadowDecl>(D)->getTargetDecl();
else if (D->getDeclContext()->isFunctionOrMethod())
return false;
if (isa<FunctionDecl>(D)) {
FunctionDecl *FDecl = cast<FunctionDecl>(D);
if (FDecl->getBuiltinID() && FDecl->isImplicit())
return false;
} else if (!isa<FunctionTemplateDecl>(D))
return false;
}
return true;
}
static bool CheckDeclInExpr(Sema &S, SourceLocation Loc, NamedDecl *D) {
if (isa<TypedefNameDecl>(D)) {
S.Diag(Loc, diag::err_unexpected_typedef) << D->getDeclName();
return true;
}
if (isa<ObjCInterfaceDecl>(D)) {
S.Diag(Loc, diag::err_unexpected_interface) << D->getDeclName();
return true;
}
if (isa<NamespaceDecl>(D)) {
S.Diag(Loc, diag::err_unexpected_namespace) << D->getDeclName();
return true;
}
return false;
}
ExprResult
Sema::BuildDeclarationNameExpr(const CXXScopeSpec &SS,
LookupResult &R,
bool NeedsADL) {
if (!NeedsADL && R.isSingleResult() && !R.getAsSingle<FunctionTemplateDecl>())
return BuildDeclarationNameExpr(SS, R.getLookupNameInfo(),
R.getFoundDecl());
if (R.isSingleResult() &&
CheckDeclInExpr(*this, R.getNameLoc(), R.getFoundDecl()))
return ExprError();
R.suppressDiagnostics();
UnresolvedLookupExpr *ULE
= UnresolvedLookupExpr::Create(Context, R.getNamingClass(),
SS.getWithLocInContext(Context),
R.getLookupNameInfo(),
NeedsADL, R.isOverloadedResult(),
R.begin(), R.end());
return Owned(ULE);
}
ExprResult
Sema::BuildDeclarationNameExpr(const CXXScopeSpec &SS,
const DeclarationNameInfo &NameInfo,
NamedDecl *D) {
assert(D && "Cannot refer to a NULL declaration");
assert(!isa<FunctionTemplateDecl>(D) &&
"Cannot refer unambiguously to a function template");
SourceLocation Loc = NameInfo.getLoc();
if (CheckDeclInExpr(*this, Loc, D))
return ExprError();
if (TemplateDecl *Template = dyn_cast<TemplateDecl>(D)) {
Diag(Loc, diag::err_template_decl_ref)
<< Template << SS.getRange();
Diag(Template->getLocation(), diag::note_template_decl_here);
return ExprError();
}
ValueDecl *VD = dyn_cast<ValueDecl>(D);
if (!VD) {
Diag(Loc, diag::err_ref_non_value)
<< D << SS.getRange();
Diag(D->getLocation(), diag::note_declared_at);
return ExprError();
}
if (DiagnoseUseOfDecl(VD, Loc))
return ExprError();
if (VD->isInvalidDecl())
return ExprError();
if (IndirectFieldDecl *indirectField = dyn_cast<IndirectFieldDecl>(VD))
if (!indirectField->isCXXClassMember())
return BuildAnonymousStructUnionMemberReference(SS, NameInfo.getLoc(),
indirectField);
{
QualType type = VD->getType();
ExprValueKind valueKind = VK_RValue;
switch (D->getKind()) {
#define ABSTRACT_DECL(kind)
#define VALUE(type, base)
#define DECL(type, base) \
case Decl::type:
#include "clang/AST/DeclNodes.inc"
llvm_unreachable("invalid value decl kind");
case Decl::ObjCAtDefsField:
case Decl::ObjCIvar:
llvm_unreachable("forming non-member reference to ivar?");
case Decl::EnumConstant:
case Decl::UnresolvedUsingValue:
valueKind = VK_RValue;
break;
case Decl::Field:
case Decl::IndirectField:
assert(getLangOpts().CPlusPlus &&
"building reference to field in C?");
type = type.getNonReferenceType();
valueKind = VK_LValue;
break;
case Decl::NonTypeTemplateParm: {
if (const ReferenceType *reftype = type->getAs<ReferenceType>()) {
type = reftype->getPointeeType();
valueKind = VK_LValue; break;
}
valueKind = VK_RValue;
type = type.getUnqualifiedType();
break;
}
case Decl::Var:
if (!getLangOpts().CPlusPlus &&
!type.hasQualifiers() &&
type->isVoidType()) {
valueKind = VK_RValue;
break;
}
case Decl::ImplicitParam:
case Decl::ParmVar: {
valueKind = VK_LValue;
type = type.getNonReferenceType();
if (!isUnevaluatedContext()) {
QualType CapturedType = getCapturedDeclRefType(cast<VarDecl>(VD), Loc);
if (!CapturedType.isNull())
type = CapturedType;
}
break;
}
case Decl::Function: {
if (unsigned BID = cast<FunctionDecl>(VD)->getBuiltinID()) {
if (!Context.BuiltinInfo.isPredefinedLibFunction(BID)) {
type = Context.BuiltinFnTy;
valueKind = VK_RValue;
break;
}
}
const FunctionType *fty = type->castAs<FunctionType>();
if (fty->getResultType() == Context.UnknownAnyTy) {
type = Context.UnknownAnyTy;
valueKind = VK_RValue;
break;
}
if (getLangOpts().CPlusPlus) {
valueKind = VK_LValue;
break;
}
if (!cast<FunctionDecl>(VD)->hasPrototype() &&
isa<FunctionProtoType>(fty))
type = Context.getFunctionNoProtoType(fty->getResultType(),
fty->getExtInfo());
valueKind = VK_RValue;
break;
}
case Decl::CXXMethod:
if (const FunctionProtoType *proto
= dyn_cast<FunctionProtoType>(VD->getType()))
if (proto->getResultType() == Context.UnknownAnyTy) {
type = Context.UnknownAnyTy;
valueKind = VK_RValue;
break;
}
if (cast<CXXMethodDecl>(VD)->isStatic()) {
valueKind = VK_LValue;
break;
}
case Decl::CXXConversion:
case Decl::CXXDestructor:
case Decl::CXXConstructor:
valueKind = VK_RValue;
break;
}
return BuildDeclRefExpr(VD, type, valueKind, NameInfo, &SS);
}
}
ExprResult Sema::ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind) {
PredefinedExpr::IdentType IT;
switch (Kind) {
default: llvm_unreachable("Unknown simple primary expr!");
case tok::kw___func__: IT = PredefinedExpr::Func; break; case tok::kw___FUNCTION__: IT = PredefinedExpr::Function; break;
case tok::kw_L__FUNCTION__: IT = PredefinedExpr::LFunction; break;
case tok::kw___PRETTY_FUNCTION__: IT = PredefinedExpr::PrettyFunction; break;
}
Decl *currentDecl = getCurFunctionOrMethodDecl();
if (!currentDecl && getCurBlock())
currentDecl = getCurBlock()->TheDecl;
if (!currentDecl) {
Diag(Loc, diag::ext_predef_outside_function);
currentDecl = Context.getTranslationUnitDecl();
}
QualType ResTy;
if (cast<DeclContext>(currentDecl)->isDependentContext()) {
ResTy = Context.DependentTy;
} else {
unsigned Length = PredefinedExpr::ComputeName(IT, currentDecl).length();
llvm::APInt LengthI(32, Length + 1);
if (IT == PredefinedExpr::LFunction)
ResTy = Context.WCharTy.withConst();
else
ResTy = Context.CharTy.withConst();
ResTy = Context.getConstantArrayType(ResTy, LengthI, ArrayType::Normal, 0);
}
return Owned(new (Context) PredefinedExpr(Loc, ResTy, IT));
}
ExprResult Sema::ActOnCharacterConstant(const Token &Tok, Scope *UDLScope) {
SmallString<16> CharBuffer;
bool Invalid = false;
StringRef ThisTok = PP.getSpelling(Tok, CharBuffer, &Invalid);
if (Invalid)
return ExprError();
CharLiteralParser Literal(ThisTok.begin(), ThisTok.end(), Tok.getLocation(),
PP, Tok.getKind());
if (Literal.hadError())
return ExprError();
QualType Ty;
if (Literal.isWide())
Ty = Context.WCharTy; else if (Literal.isUTF16())
Ty = Context.Char16Ty; else if (Literal.isUTF32())
Ty = Context.Char32Ty; else if (!getLangOpts().CPlusPlus || Literal.isMultiChar())
Ty = Context.IntTy; else
Ty = Context.CharTy;
CharacterLiteral::CharacterKind Kind = CharacterLiteral::Ascii;
if (Literal.isWide())
Kind = CharacterLiteral::Wide;
else if (Literal.isUTF16())
Kind = CharacterLiteral::UTF16;
else if (Literal.isUTF32())
Kind = CharacterLiteral::UTF32;
Expr *Lit = new (Context) CharacterLiteral(Literal.getValue(), Kind, Ty,
Tok.getLocation());
if (Literal.getUDSuffix().empty())
return Owned(Lit);
IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix());
SourceLocation UDSuffixLoc =
getUDSuffixLoc(*this, Tok.getLocation(), Literal.getUDSuffixOffset());
if (!UDLScope)
return ExprError(Diag(UDSuffixLoc, diag::err_invalid_character_udl));
return BuildCookedLiteralOperatorCall(*this, UDLScope, UDSuffix, UDSuffixLoc,
llvm::makeArrayRef(&Lit, 1),
Tok.getLocation());
}
ExprResult Sema::ActOnIntegerConstant(SourceLocation Loc, uint64_t Val) {
unsigned IntSize = Context.getTargetInfo().getIntWidth();
return Owned(IntegerLiteral::Create(Context, llvm::APInt(IntSize, Val),
Context.IntTy, Loc));
}
static Expr *BuildFloatingLiteral(Sema &S, NumericLiteralParser &Literal,
QualType Ty, SourceLocation Loc) {
const llvm::fltSemantics &Format = S.Context.getFloatTypeSemantics(Ty);
using llvm::APFloat;
APFloat Val(Format);
APFloat::opStatus result = Literal.GetFloatValue(Val);
if ((result & APFloat::opOverflow) ||
((result & APFloat::opUnderflow) && Val.isZero())) {
unsigned diagnostic;
SmallString<20> buffer;
if (result & APFloat::opOverflow) {
diagnostic = diag::warn_float_overflow;
APFloat::getLargest(Format).toString(buffer);
} else {
diagnostic = diag::warn_float_underflow;
APFloat::getSmallest(Format).toString(buffer);
}
S.Diag(Loc, diagnostic)
<< Ty
<< StringRef(buffer.data(), buffer.size());
}
bool isExact = (result == APFloat::opOK);
return FloatingLiteral::Create(S.Context, Val, isExact, Ty, Loc);
}
ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
if (Tok.getLength() == 1) {
const char Val = PP.getSpellingOfSingleCharacterNumericConstant(Tok);
return ActOnIntegerConstant(Tok.getLocation(), Val-'0');
}
SmallString<128> SpellingBuffer;
SpellingBuffer.resize(Tok.getLength() + 1);
bool Invalid = false;
StringRef TokSpelling = PP.getSpelling(Tok, SpellingBuffer, &Invalid);
if (Invalid)
return ExprError();
NumericLiteralParser Literal(TokSpelling, Tok.getLocation(), PP);
if (Literal.hadError)
return ExprError();
if (Literal.hasUDSuffix()) {
IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix());
SourceLocation UDSuffixLoc =
getUDSuffixLoc(*this, Tok.getLocation(), Literal.getUDSuffixOffset());
if (!UDLScope)
return ExprError(Diag(UDSuffixLoc, diag::err_invalid_numeric_udl));
QualType CookedTy;
if (Literal.isFloatingLiteral()) {
CookedTy = Context.LongDoubleTy;
} else {
CookedTy = Context.UnsignedLongLongTy;
}
DeclarationName OpName =
Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix);
DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc);
OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc);
LookupResult R(*this, OpName, UDSuffixLoc, LookupOrdinaryName);
switch (LookupLiteralOperator(UDLScope, R, llvm::makeArrayRef(&CookedTy, 1),
true)) {
case LOLR_Error:
return ExprError();
case LOLR_Cooked: {
Expr *Lit;
if (Literal.isFloatingLiteral()) {
Lit = BuildFloatingLiteral(*this, Literal, CookedTy, Tok.getLocation());
} else {
llvm::APInt ResultVal(Context.getTargetInfo().getLongLongWidth(), 0);
if (Literal.GetIntegerValue(ResultVal))
Diag(Tok.getLocation(), diag::warn_integer_too_large);
Lit = IntegerLiteral::Create(Context, ResultVal, CookedTy,
Tok.getLocation());
}
return BuildLiteralOperatorCall(R, OpNameInfo,
llvm::makeArrayRef(&Lit, 1),
Tok.getLocation());
}
case LOLR_Raw: {
SourceLocation TokLoc = Tok.getLocation();
unsigned Length = Literal.getUDSuffixOffset();
QualType StrTy = Context.getConstantArrayType(
Context.CharTy, llvm::APInt(32, Length + 1),
ArrayType::Normal, 0);
Expr *Lit = StringLiteral::Create(
Context, StringRef(TokSpelling.data(), Length), StringLiteral::Ascii,
false, StrTy, &TokLoc, 1);
return BuildLiteralOperatorCall(R, OpNameInfo,
llvm::makeArrayRef(&Lit, 1), TokLoc);
}
case LOLR_Template:
TemplateArgumentListInfo ExplicitArgs;
unsigned CharBits = Context.getIntWidth(Context.CharTy);
bool CharIsUnsigned = Context.CharTy->isUnsignedIntegerType();
llvm::APSInt Value(CharBits, CharIsUnsigned);
for (unsigned I = 0, N = Literal.getUDSuffixOffset(); I != N; ++I) {
Value = TokSpelling[I];
TemplateArgument Arg(Context, Value, Context.CharTy);
TemplateArgumentLocInfo ArgInfo;
ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo));
}
return BuildLiteralOperatorCall(R, OpNameInfo, ArrayRef<Expr*>(),
Tok.getLocation(), &ExplicitArgs);
}
llvm_unreachable("unexpected literal operator lookup result");
}
Expr *Res;
if (Literal.isFloatingLiteral()) {
QualType Ty;
if (Literal.isFloat)
Ty = Context.FloatTy;
else if (!Literal.isLong)
Ty = Context.DoubleTy;
else
Ty = Context.LongDoubleTy;
Res = BuildFloatingLiteral(*this, Literal, Ty, Tok.getLocation());
if (Ty == Context.DoubleTy) {
if (getLangOpts().SinglePrecisionConstants) {
Res = ImpCastExprToType(Res, Context.FloatTy, CK_FloatingCast).take();
} else if (getLangOpts().OpenCL && !getOpenCLOptions().cl_khr_fp64) {
Diag(Tok.getLocation(), diag::warn_double_const_requires_fp64);
Res = ImpCastExprToType(Res, Context.FloatTy, CK_FloatingCast).take();
}
}
} else if (!Literal.isIntegerLiteral()) {
return ExprError();
} else {
QualType Ty;
if (!getLangOpts().C99 && Literal.isLongLong) {
if (getLangOpts().CPlusPlus)
Diag(Tok.getLocation(),
getLangOpts().CPlusPlus0x ?
diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
else
Diag(Tok.getLocation(), diag::ext_c99_longlong);
}
unsigned MaxWidth = Context.getTargetInfo().getIntMaxTWidth();
if (Literal.isMicrosoftInteger && MaxWidth < 128 &&
PP.getTargetInfo().hasInt128Type())
MaxWidth = 128;
llvm::APInt ResultVal(MaxWidth, 0);
if (Literal.GetIntegerValue(ResultVal)) {
Diag(Tok.getLocation(), diag::warn_integer_too_large);
Ty = Context.UnsignedLongLongTy;
assert(Context.getTypeSize(Ty) == ResultVal.getBitWidth() &&
"long long is not intmax_t?");
} else {
bool AllowUnsigned = Literal.isUnsigned || Literal.getRadix() != 10;
unsigned Width = 0;
if (!Literal.isLong && !Literal.isLongLong) {
unsigned IntSize = Context.getTargetInfo().getIntWidth();
if (ResultVal.isIntN(IntSize)) {
if (!Literal.isUnsigned && ResultVal[IntSize-1] == 0)
Ty = Context.IntTy;
else if (AllowUnsigned)
Ty = Context.UnsignedIntTy;
Width = IntSize;
}
}
if (Ty.isNull() && !Literal.isLongLong) {
unsigned LongSize = Context.getTargetInfo().getLongWidth();
if (ResultVal.isIntN(LongSize)) {
if (!Literal.isUnsigned && ResultVal[LongSize-1] == 0)
Ty = Context.LongTy;
else if (AllowUnsigned)
Ty = Context.UnsignedLongTy;
Width = LongSize;
}
}
if (Ty.isNull()) {
unsigned LongLongSize = Context.getTargetInfo().getLongLongWidth();
if (ResultVal.isIntN(LongLongSize)) {
if (!Literal.isUnsigned && (ResultVal[LongLongSize-1] == 0 ||
(getLangOpts().MicrosoftExt && Literal.isLongLong)))
Ty = Context.LongLongTy;
else if (AllowUnsigned)
Ty = Context.UnsignedLongLongTy;
Width = LongLongSize;
}
}
if (Ty.isNull() && Literal.isMicrosoftInteger &&
PP.getTargetInfo().hasInt128Type()) {
if (Literal.isUnsigned)
Ty = Context.UnsignedInt128Ty;
else
Ty = Context.Int128Ty;
Width = 128;
}
if (Ty.isNull()) {
Diag(Tok.getLocation(), diag::warn_integer_too_large_for_signed);
Ty = Context.UnsignedLongLongTy;
Width = Context.getTargetInfo().getLongLongWidth();
}
if (ResultVal.getBitWidth() != Width)
ResultVal = ResultVal.trunc(Width);
}
Res = IntegerLiteral::Create(Context, ResultVal, Ty, Tok.getLocation());
}
if (Literal.isImaginary)
Res = new (Context) ImaginaryLiteral(Res,
Context.getComplexType(Res->getType()));
return Owned(Res);
}
ExprResult Sema::ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E) {
assert((E != 0) && "ActOnParenExpr() missing expr");
return Owned(new (Context) ParenExpr(L, R, E));
}
static bool CheckVecStepTraitOperandType(Sema &S, QualType T,
SourceLocation Loc,
SourceRange ArgRange) {
if (!(T->isArithmeticType() || T->isVoidType() || T->isVectorType())) {
S.Diag(Loc, diag::err_vecstep_non_scalar_vector_type)
<< T << ArgRange;
return true;
}
assert((T->isVoidType() || !T->isIncompleteType()) &&
"Scalar types should always be complete");
return false;
}
static bool CheckExtensionTraitOperandType(Sema &S, QualType T,
SourceLocation Loc,
SourceRange ArgRange,
UnaryExprOrTypeTrait TraitKind) {
if (T->isFunctionType()) {
if (TraitKind == UETT_SizeOf)
S.Diag(Loc, diag::ext_sizeof_function_type) << ArgRange;
return false;
}
if (T->isVoidType()) {
S.Diag(Loc, diag::ext_sizeof_void_type) << TraitKind << ArgRange;
return false;
}
return true;
}
static bool CheckObjCTraitOperandConstraints(Sema &S, QualType T,
SourceLocation Loc,
SourceRange ArgRange,
UnaryExprOrTypeTrait TraitKind) {
if (!S.LangOpts.ObjCRuntime.allowsSizeofAlignof() && T->isObjCObjectType()) {
S.Diag(Loc, diag::err_sizeof_nonfragile_interface)
<< T << (TraitKind == UETT_SizeOf)
<< ArgRange;
return true;
}
return false;
}
bool Sema::CheckUnaryExprOrTypeTraitOperand(Expr *E,
UnaryExprOrTypeTrait ExprKind) {
QualType ExprTy = E->getType();
if (const ReferenceType *Ref = ExprTy->getAs<ReferenceType>())
ExprTy = Ref->getPointeeType();
if (ExprKind == UETT_VecStep)
return CheckVecStepTraitOperandType(*this, ExprTy, E->getExprLoc(),
E->getSourceRange());
if (!CheckExtensionTraitOperandType(*this, ExprTy, E->getExprLoc(),
E->getSourceRange(), ExprKind))
return false;
if (RequireCompleteExprType(E,
diag::err_sizeof_alignof_incomplete_type,
ExprKind, E->getSourceRange()))
return true;
ExprTy = E->getType();
if (const ReferenceType *Ref = ExprTy->getAs<ReferenceType>())
ExprTy = Ref->getPointeeType();
if (CheckObjCTraitOperandConstraints(*this, ExprTy, E->getExprLoc(),
E->getSourceRange(), ExprKind))
return true;
if (ExprKind == UETT_SizeOf) {
if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E->IgnoreParens())) {
if (ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(DeclRef->getFoundDecl())) {
QualType OType = PVD->getOriginalType();
QualType Type = PVD->getType();
if (Type->isPointerType() && OType->isArrayType()) {
Diag(E->getExprLoc(), diag::warn_sizeof_array_param)
<< Type << OType;
Diag(PVD->getLocation(), diag::note_declared_at);
}
}
}
}
return false;
}
bool Sema::CheckUnaryExprOrTypeTraitOperand(QualType ExprType,
SourceLocation OpLoc,
SourceRange ExprRange,
UnaryExprOrTypeTrait ExprKind) {
if (ExprType->isDependentType())
return false;
if (const ReferenceType *Ref = ExprType->getAs<ReferenceType>())
ExprType = Ref->getPointeeType();
if (ExprKind == UETT_VecStep)
return CheckVecStepTraitOperandType(*this, ExprType, OpLoc, ExprRange);
if (!CheckExtensionTraitOperandType(*this, ExprType, OpLoc, ExprRange,
ExprKind))
return false;
if (RequireCompleteType(OpLoc, ExprType,
diag::err_sizeof_alignof_incomplete_type,
ExprKind, ExprRange))
return true;
if (CheckObjCTraitOperandConstraints(*this, ExprType, OpLoc, ExprRange,
ExprKind))
return true;
return false;
}
static bool CheckAlignOfExpr(Sema &S, Expr *E) {
E = E->IgnoreParens();
if (isa<DeclRefExpr>(E))
return false;
if (E->isTypeDependent())
return false;
if (E->getBitField()) {
S.Diag(E->getExprLoc(), diag::err_sizeof_alignof_bitfield)
<< 1 << E->getSourceRange();
return true;
}
if (MemberExpr *ME = dyn_cast<MemberExpr>(E))
if (isa<FieldDecl>(ME->getMemberDecl()))
return false;
return S.CheckUnaryExprOrTypeTraitOperand(E, UETT_AlignOf);
}
bool Sema::CheckVecStepExpr(Expr *E) {
E = E->IgnoreParens();
if (E->isTypeDependent())
return false;
return CheckUnaryExprOrTypeTraitOperand(E, UETT_VecStep);
}
ExprResult
Sema::CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
SourceLocation OpLoc,
UnaryExprOrTypeTrait ExprKind,
SourceRange R) {
if (!TInfo)
return ExprError();
QualType T = TInfo->getType();
if (!T->isDependentType() &&
CheckUnaryExprOrTypeTraitOperand(T, OpLoc, R, ExprKind))
return ExprError();
return Owned(new (Context) UnaryExprOrTypeTraitExpr(ExprKind, TInfo,
Context.getSizeType(),
OpLoc, R.getEnd()));
}
ExprResult
Sema::CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc,
UnaryExprOrTypeTrait ExprKind) {
ExprResult PE = CheckPlaceholderExpr(E);
if (PE.isInvalid())
return ExprError();
E = PE.get();
bool isInvalid = false;
if (E->isTypeDependent()) {
} else if (ExprKind == UETT_AlignOf) {
isInvalid = CheckAlignOfExpr(*this, E);
} else if (ExprKind == UETT_VecStep) {
isInvalid = CheckVecStepExpr(E);
} else if (E->getBitField()) { Diag(E->getExprLoc(), diag::err_sizeof_alignof_bitfield) << 0;
isInvalid = true;
} else {
isInvalid = CheckUnaryExprOrTypeTraitOperand(E, UETT_SizeOf);
}
if (isInvalid)
return ExprError();
if (ExprKind == UETT_SizeOf && E->getType()->isVariableArrayType()) {
PE = TranformToPotentiallyEvaluated(E);
if (PE.isInvalid()) return ExprError();
E = PE.take();
}
return Owned(new (Context) UnaryExprOrTypeTraitExpr(
ExprKind, E, Context.getSizeType(), OpLoc,
E->getSourceRange().getEnd()));
}
ExprResult
Sema::ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
UnaryExprOrTypeTrait ExprKind, bool IsType,
void *TyOrEx, const SourceRange &ArgRange) {
if (TyOrEx == 0) return ExprError();
if (IsType) {
TypeSourceInfo *TInfo;
(void) GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrEx), &TInfo);
return CreateUnaryExprOrTypeTraitExpr(TInfo, OpLoc, ExprKind, ArgRange);
}
Expr *ArgEx = (Expr *)TyOrEx;
ExprResult Result = CreateUnaryExprOrTypeTraitExpr(ArgEx, OpLoc, ExprKind);
return Result;
}
static QualType CheckRealImagOperand(Sema &S, ExprResult &V, SourceLocation Loc,
bool IsReal) {
if (V.get()->isTypeDependent())
return S.Context.DependentTy;
if (V.get()->getObjectKind() != OK_Ordinary) {
V = S.DefaultLvalueConversion(V.take());
if (V.isInvalid())
return QualType();
}
if (const ComplexType *CT = V.get()->getType()->getAs<ComplexType>())
return CT->getElementType();
if (V.get()->getType()->isArithmeticType())
return V.get()->getType();
ExprResult PR = S.CheckPlaceholderExpr(V.get());
if (PR.isInvalid()) return QualType();
if (PR.get() != V.get()) {
V = PR;
return CheckRealImagOperand(S, V, Loc, IsReal);
}
S.Diag(Loc, diag::err_realimag_invalid_type) << V.get()->getType()
<< (IsReal ? "__real" : "__imag");
return QualType();
}
ExprResult
Sema::ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
tok::TokenKind Kind, Expr *Input) {
UnaryOperatorKind Opc;
switch (Kind) {
default: llvm_unreachable("Unknown unary op!");
case tok::plusplus: Opc = UO_PostInc; break;
case tok::minusminus: Opc = UO_PostDec; break;
}
ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Input);
if (Result.isInvalid()) return ExprError();
Input = Result.take();
return BuildUnaryOp(S, OpLoc, Opc, Input);
}
static bool checkArithmeticOnObjCPointer(Sema &S,
SourceLocation opLoc,
Expr *op) {
assert(op->getType()->isObjCObjectPointerType());
if (S.LangOpts.ObjCRuntime.allowsPointerArithmetic())
return false;
S.Diag(opLoc, diag::err_arithmetic_nonfragile_interface)
<< op->getType()->castAs<ObjCObjectPointerType>()->getPointeeType()
<< op->getSourceRange();
return true;
}
ExprResult
Sema::ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc,
Expr *Idx, SourceLocation RLoc) {
ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Base);
if (Result.isInvalid()) return ExprError();
Base = Result.take();
Expr *LHSExp = Base, *RHSExp = Idx;
if (getLangOpts().CPlusPlus &&
(LHSExp->isTypeDependent() || RHSExp->isTypeDependent())) {
return Owned(new (Context) ArraySubscriptExpr(LHSExp, RHSExp,
Context.DependentTy,
VK_LValue, OK_Ordinary,
RLoc));
}
if (getLangOpts().CPlusPlus &&
(LHSExp->getType()->isRecordType() ||
LHSExp->getType()->isEnumeralType() ||
RHSExp->getType()->isRecordType() ||
RHSExp->getType()->isEnumeralType()) &&
!LHSExp->getType()->isObjCObjectPointerType()) {
return CreateOverloadedArraySubscriptExpr(LLoc, RLoc, Base, Idx);
}
return CreateBuiltinArraySubscriptExpr(Base, LLoc, Idx, RLoc);
}
ExprResult
Sema::CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc,
Expr *Idx, SourceLocation RLoc) {
Expr *LHSExp = Base;
Expr *RHSExp = Idx;
if (!LHSExp->getType()->getAs<VectorType>()) {
ExprResult Result = DefaultFunctionArrayLvalueConversion(LHSExp);
if (Result.isInvalid())
return ExprError();
LHSExp = Result.take();
}
ExprResult Result = DefaultFunctionArrayLvalueConversion(RHSExp);
if (Result.isInvalid())
return ExprError();
RHSExp = Result.take();
QualType LHSTy = LHSExp->getType(), RHSTy = RHSExp->getType();
ExprValueKind VK = VK_LValue;
ExprObjectKind OK = OK_Ordinary;
Expr *BaseExpr, *IndexExpr;
QualType ResultType;
if (LHSTy->isDependentType() || RHSTy->isDependentType()) {
BaseExpr = LHSExp;
IndexExpr = RHSExp;
ResultType = Context.DependentTy;
} else if (const PointerType *PTy = LHSTy->getAs<PointerType>()) {
BaseExpr = LHSExp;
IndexExpr = RHSExp;
ResultType = PTy->getPointeeType();
} else if (const ObjCObjectPointerType *PTy =
LHSTy->getAs<ObjCObjectPointerType>()) {
BaseExpr = LHSExp;
IndexExpr = RHSExp;
if (!LangOpts.ObjCRuntime.isSubscriptPointerArithmetic())
return BuildObjCSubscriptExpression(RLoc, BaseExpr, IndexExpr, 0, 0);
ResultType = PTy->getPointeeType();
if (!LangOpts.ObjCRuntime.allowsPointerArithmetic()) {
Diag(LLoc, diag::err_subscript_nonfragile_interface)
<< ResultType << BaseExpr->getSourceRange();
return ExprError();
}
} else if (const PointerType *PTy = RHSTy->getAs<PointerType>()) {
BaseExpr = RHSExp;
IndexExpr = LHSExp;
ResultType = PTy->getPointeeType();
} else if (const ObjCObjectPointerType *PTy =
RHSTy->getAs<ObjCObjectPointerType>()) {
BaseExpr = RHSExp;
IndexExpr = LHSExp;
ResultType = PTy->getPointeeType();
if (!LangOpts.ObjCRuntime.allowsPointerArithmetic()) {
Diag(LLoc, diag::err_subscript_nonfragile_interface)
<< ResultType << BaseExpr->getSourceRange();
return ExprError();
}
} else if (const VectorType *VTy = LHSTy->getAs<VectorType>()) {
BaseExpr = LHSExp; IndexExpr = RHSExp;
VK = LHSExp->getValueKind();
if (VK != VK_RValue)
OK = OK_VectorComponent;
ResultType = VTy->getElementType();
} else if (LHSTy->isArrayType()) {
Diag(LHSExp->getLocStart(), diag::ext_subscript_non_lvalue) <<
LHSExp->getSourceRange();
LHSExp = ImpCastExprToType(LHSExp, Context.getArrayDecayedType(LHSTy),
CK_ArrayToPointerDecay).take();
LHSTy = LHSExp->getType();
BaseExpr = LHSExp;
IndexExpr = RHSExp;
ResultType = LHSTy->getAs<PointerType>()->getPointeeType();
} else if (RHSTy->isArrayType()) {
Diag(RHSExp->getLocStart(), diag::ext_subscript_non_lvalue) <<
RHSExp->getSourceRange();
RHSExp = ImpCastExprToType(RHSExp, Context.getArrayDecayedType(RHSTy),
CK_ArrayToPointerDecay).take();
RHSTy = RHSExp->getType();
BaseExpr = RHSExp;
IndexExpr = LHSExp;
ResultType = RHSTy->getAs<PointerType>()->getPointeeType();
} else {
return ExprError(Diag(LLoc, diag::err_typecheck_subscript_value)
<< LHSExp->getSourceRange() << RHSExp->getSourceRange());
}
if (!IndexExpr->getType()->isIntegerType() && !IndexExpr->isTypeDependent())
return ExprError(Diag(LLoc, diag::err_typecheck_subscript_not_integer)
<< IndexExpr->getSourceRange());
if ((IndexExpr->getType()->isSpecificBuiltinType(BuiltinType::Char_S) ||
IndexExpr->getType()->isSpecificBuiltinType(BuiltinType::Char_U))
&& !IndexExpr->isTypeDependent())
Diag(LLoc, diag::warn_subscript_is_char) << IndexExpr->getSourceRange();
if (ResultType->isFunctionType()) {
Diag(BaseExpr->getLocStart(), diag::err_subscript_function_type)
<< ResultType << BaseExpr->getSourceRange();
return ExprError();
}
if (ResultType->isVoidType() && !getLangOpts().CPlusPlus) {
Diag(LLoc, diag::ext_gnu_subscript_void_type)
<< BaseExpr->getSourceRange();
if (!ResultType.hasQualifiers()) VK = VK_RValue;
} else if (!ResultType->isDependentType() &&
RequireCompleteType(LLoc, ResultType,
diag::err_subscript_incomplete_type, BaseExpr))
return ExprError();
assert(VK == VK_RValue || LangOpts.CPlusPlus ||
!ResultType.isCForbiddenLValueType());
return Owned(new (Context) ArraySubscriptExpr(LHSExp, RHSExp,
ResultType, VK, OK, RLoc));
}
ExprResult Sema::BuildCXXDefaultArgExpr(SourceLocation CallLoc,
FunctionDecl *FD,
ParmVarDecl *Param) {
if (Param->hasUnparsedDefaultArg()) {
Diag(CallLoc,
diag::err_use_of_default_argument_to_function_declared_later) <<
FD << cast<CXXRecordDecl>(FD->getDeclContext())->getDeclName();
Diag(UnparsedDefaultArgLocs[Param],
diag::note_default_argument_declared_here);
return ExprError();
}
if (Param->hasUninstantiatedDefaultArg()) {
Expr *UninstExpr = Param->getUninstantiatedDefaultArg();
EnterExpressionEvaluationContext EvalContext(*this, PotentiallyEvaluated,
Param);
MultiLevelTemplateArgumentList ArgList
= getTemplateInstantiationArgs(FD, 0, true);
std::pair<const TemplateArgument *, unsigned> Innermost
= ArgList.getInnermost();
InstantiatingTemplate Inst(*this, CallLoc, Param,
ArrayRef<TemplateArgument>(Innermost.first,
Innermost.second));
if (Inst)
return ExprError();
ExprResult Result;
{
ContextRAII SavedContext(*this, FD);
LocalInstantiationScope Local(*this);
Result = SubstExpr(UninstExpr, ArgList);
}
if (Result.isInvalid())
return ExprError();
InitializedEntity Entity
= InitializedEntity::InitializeParameter(Context, Param);
InitializationKind Kind
= InitializationKind::CreateCopy(Param->getLocation(),
UninstExpr->getLocStart());
Expr *ResultE = Result.takeAs<Expr>();
InitializationSequence InitSeq(*this, Entity, Kind, &ResultE, 1);
Result = InitSeq.Perform(*this, Entity, Kind, ResultE);
if (Result.isInvalid())
return ExprError();
Expr *Arg = Result.takeAs<Expr>();
CheckImplicitConversions(Arg, Param->getOuterLocStart());
return Owned(CXXDefaultArgExpr::Create(Context, CallLoc, Param, Arg));
}
if (isa<ExprWithCleanups>(Param->getInit())) {
ExprNeedsCleanups = true;
assert(!cast<ExprWithCleanups>(Param->getInit())->getNumObjects() &&
"default argument expression has capturing blocks?");
}
MarkDeclarationsReferencedInExpr(Param->getDefaultArg(),
true);
return Owned(CXXDefaultArgExpr::Create(Context, CallLoc, Param));
}
Sema::VariadicCallType
Sema::getVariadicCallType(FunctionDecl *FDecl, const FunctionProtoType *Proto,
Expr *Fn) {
if (Proto && Proto->isVariadic()) {
if (dyn_cast_or_null<CXXConstructorDecl>(FDecl))
return VariadicConstructor;
else if (Fn && Fn->getType()->isBlockPointerType())
return VariadicBlock;
else if (FDecl) {
if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl))
if (Method->isInstance())
return VariadicMethod;
}
return VariadicFunction;
}
return VariadicDoesNotApply;
}
bool
Sema::ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
FunctionDecl *FDecl,
const FunctionProtoType *Proto,
Expr **Args, unsigned NumArgs,
SourceLocation RParenLoc,
bool IsExecConfig) {
if (FDecl)
if (unsigned ID = FDecl->getBuiltinID())
if (Context.BuiltinInfo.hasCustomTypechecking(ID))
return false;
unsigned NumArgsInProto = Proto->getNumArgs();
bool Invalid = false;
unsigned MinArgs = FDecl ? FDecl->getMinRequiredArguments() : NumArgsInProto;
unsigned FnKind = Fn->getType()->isBlockPointerType()
? 1
: (IsExecConfig ? 3
: 0 );
if (NumArgs < NumArgsInProto) {
if (NumArgs < MinArgs) {
if (MinArgs == 1 && FDecl && FDecl->getParamDecl(0)->getDeclName())
Diag(RParenLoc, MinArgs == NumArgsInProto && !Proto->isVariadic()
? diag::err_typecheck_call_too_few_args_one
: diag::err_typecheck_call_too_few_args_at_least_one)
<< FnKind
<< FDecl->getParamDecl(0) << Fn->getSourceRange();
else
Diag(RParenLoc, MinArgs == NumArgsInProto && !Proto->isVariadic()
? diag::err_typecheck_call_too_few_args
: diag::err_typecheck_call_too_few_args_at_least)
<< FnKind
<< MinArgs << NumArgs << Fn->getSourceRange();
if (FDecl && !FDecl->getBuiltinID() && !IsExecConfig)
Diag(FDecl->getLocStart(), diag::note_callee_decl)
<< FDecl;
return true;
}
Call->setNumArgs(Context, NumArgsInProto);
}
if (NumArgs > NumArgsInProto) {
if (!Proto->isVariadic()) {
if (NumArgsInProto == 1 && FDecl && FDecl->getParamDecl(0)->getDeclName())
Diag(Args[NumArgsInProto]->getLocStart(),
MinArgs == NumArgsInProto
? diag::err_typecheck_call_too_many_args_one
: diag::err_typecheck_call_too_many_args_at_most_one)
<< FnKind
<< FDecl->getParamDecl(0) << NumArgs << Fn->getSourceRange()
<< SourceRange(Args[NumArgsInProto]->getLocStart(),
Args[NumArgs-1]->getLocEnd());
else
Diag(Args[NumArgsInProto]->getLocStart(),
MinArgs == NumArgsInProto
? diag::err_typecheck_call_too_many_args
: diag::err_typecheck_call_too_many_args_at_most)
<< FnKind
<< NumArgsInProto << NumArgs << Fn->getSourceRange()
<< SourceRange(Args[NumArgsInProto]->getLocStart(),
Args[NumArgs-1]->getLocEnd());
if (FDecl && !FDecl->getBuiltinID() && !IsExecConfig)
Diag(FDecl->getLocStart(), diag::note_callee_decl)
<< FDecl;
Call->setNumArgs(Context, NumArgsInProto);
return true;
}
}
SmallVector<Expr *, 8> AllArgs;
VariadicCallType CallType = getVariadicCallType(FDecl, Proto, Fn);
Invalid = GatherArgumentsForCall(Call->getLocStart(), FDecl,
Proto, 0, Args, NumArgs, AllArgs, CallType);
if (Invalid)
return true;
unsigned TotalNumArgs = AllArgs.size();
for (unsigned i = 0; i < TotalNumArgs; ++i)
Call->setArg(i, AllArgs[i]);
return false;
}
bool Sema::GatherArgumentsForCall(SourceLocation CallLoc,
FunctionDecl *FDecl,
const FunctionProtoType *Proto,
unsigned FirstProtoArg,
Expr **Args, unsigned NumArgs,
SmallVector<Expr *, 8> &AllArgs,
VariadicCallType CallType,
bool AllowExplicit) {
unsigned NumArgsInProto = Proto->getNumArgs();
unsigned NumArgsToCheck = NumArgs;
bool Invalid = false;
if (NumArgs != NumArgsInProto)
NumArgsToCheck = NumArgsInProto;
unsigned ArgIx = 0;
for (unsigned i = FirstProtoArg; i != NumArgsToCheck; i++) {
QualType ProtoArgType = Proto->getArgType(i);
Expr *Arg;
ParmVarDecl *Param;
if (ArgIx < NumArgs) {
Arg = Args[ArgIx++];
if (RequireCompleteType(Arg->getLocStart(),
ProtoArgType,
diag::err_call_incomplete_argument, Arg))
return true;
Param = 0;
if (FDecl && i < FDecl->getNumParams())
Param = FDecl->getParamDecl(i);
if (Arg->getType() == Context.ARCUnbridgedCastTy &&
FDecl && FDecl->hasAttr<CFAuditedTransferAttr>() &&
(!Param || !Param->hasAttr<CFConsumedAttr>()))
Arg = stripARCUnbridgedCast(Arg);
InitializedEntity Entity =
Param? InitializedEntity::InitializeParameter(Context, Param)
: InitializedEntity::InitializeParameter(Context, ProtoArgType,
Proto->isArgConsumed(i));
ExprResult ArgE = PerformCopyInitialization(Entity,
SourceLocation(),
Owned(Arg),
false,
AllowExplicit);
if (ArgE.isInvalid())
return true;
Arg = ArgE.takeAs<Expr>();
} else {
Param = FDecl->getParamDecl(i);
ExprResult ArgExpr =
BuildCXXDefaultArgExpr(CallLoc, FDecl, Param);
if (ArgExpr.isInvalid())
return true;
Arg = ArgExpr.takeAs<Expr>();
}
CheckArrayAccess(Arg);
CheckStaticArrayArgument(CallLoc, Param, Arg);
AllArgs.push_back(Arg);
}
if (CallType != VariadicDoesNotApply) {
if (Proto->getResultType() == Context.UnknownAnyTy &&
FDecl && FDecl->isExternC()) {
for (unsigned i = ArgIx; i != NumArgs; ++i) {
ExprResult arg;
if (isa<ExplicitCastExpr>(Args[i]->IgnoreParens()))
arg = DefaultFunctionArrayLvalueConversion(Args[i]);
else
arg = DefaultVariadicArgumentPromotion(Args[i], CallType, FDecl);
Invalid |= arg.isInvalid();
AllArgs.push_back(arg.take());
}
} else {
for (unsigned i = ArgIx; i != NumArgs; ++i) {
ExprResult Arg = DefaultVariadicArgumentPromotion(Args[i], CallType,
FDecl);
Invalid |= Arg.isInvalid();
AllArgs.push_back(Arg.take());
}
}
for (unsigned i = ArgIx; i != NumArgs; ++i)
CheckArrayAccess(Args[i]);
}
return Invalid;
}
static void DiagnoseCalleeStaticArrayParam(Sema &S, ParmVarDecl *PVD) {
TypeLoc TL = PVD->getTypeSourceInfo()->getTypeLoc();
if (ArrayTypeLoc *ATL = dyn_cast<ArrayTypeLoc>(&TL))
S.Diag(PVD->getLocation(), diag::note_callee_static_array)
<< ATL->getLocalSourceRange();
}
void
Sema::CheckStaticArrayArgument(SourceLocation CallLoc,
ParmVarDecl *Param,
const Expr *ArgExpr) {
if (!Param || getLangOpts().CPlusPlus)
return;
QualType OrigTy = Param->getOriginalType();
const ArrayType *AT = Context.getAsArrayType(OrigTy);
if (!AT || AT->getSizeModifier() != ArrayType::Static)
return;
if (ArgExpr->isNullPointerConstant(Context,
Expr::NPC_NeverValueDependent)) {
Diag(CallLoc, diag::warn_null_arg) << ArgExpr->getSourceRange();
DiagnoseCalleeStaticArrayParam(*this, Param);
return;
}
const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT);
if (!CAT)
return;
const ConstantArrayType *ArgCAT =
Context.getAsConstantArrayType(ArgExpr->IgnoreParenImpCasts()->getType());
if (!ArgCAT)
return;
if (ArgCAT->getSize().ult(CAT->getSize())) {
Diag(CallLoc, diag::warn_static_array_too_small)
<< ArgExpr->getSourceRange()
<< (unsigned) ArgCAT->getSize().getZExtValue()
<< (unsigned) CAT->getSize().getZExtValue();
DiagnoseCalleeStaticArrayParam(*this, Param);
}
}
static ExprResult rebuildUnknownAnyFunction(Sema &S, Expr *fn);
ExprResult
Sema::ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
MultiExprArg ArgExprs, SourceLocation RParenLoc,
Expr *ExecConfig, bool IsExecConfig) {
ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Fn);
if (Result.isInvalid()) return ExprError();
Fn = Result.take();
if (getLangOpts().CPlusPlus) {
if (isa<CXXPseudoDestructorExpr>(Fn)) {
if (!ArgExprs.empty()) {
Diag(Fn->getLocStart(), diag::err_pseudo_dtor_call_with_args)
<< FixItHint::CreateRemoval(
SourceRange(ArgExprs[0]->getLocStart(),
ArgExprs.back()->getLocEnd()));
}
return Owned(new (Context) CallExpr(Context, Fn, MultiExprArg(),
Context.VoidTy, VK_RValue,
RParenLoc));
}
bool Dependent = false;
if (Fn->isTypeDependent())
Dependent = true;
else if (Expr::hasAnyTypeDependentArguments(ArgExprs))
Dependent = true;
if (Dependent) {
if (ExecConfig) {
return Owned(new (Context) CUDAKernelCallExpr(
Context, Fn, cast<CallExpr>(ExecConfig), ArgExprs,
Context.DependentTy, VK_RValue, RParenLoc));
} else {
return Owned(new (Context) CallExpr(Context, Fn, ArgExprs,
Context.DependentTy, VK_RValue,
RParenLoc));
}
}
if (Fn->getType()->isRecordType())
return Owned(BuildCallToObjectOfClassType(S, Fn, LParenLoc,
ArgExprs.data(),
ArgExprs.size(), RParenLoc));
if (Fn->getType() == Context.UnknownAnyTy) {
ExprResult result = rebuildUnknownAnyFunction(*this, Fn);
if (result.isInvalid()) return ExprError();
Fn = result.take();
}
if (Fn->getType() == Context.BoundMemberTy) {
return BuildCallToMemberFunction(S, Fn, LParenLoc, ArgExprs.data(),
ArgExprs.size(), RParenLoc);
}
}
if (Fn->getType() == Context.OverloadTy) {
OverloadExpr::FindResult find = OverloadExpr::find(Fn);
if (!find.HasFormOfMemberPointer) {
OverloadExpr *ovl = find.Expression;
if (isa<UnresolvedLookupExpr>(ovl)) {
UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(ovl);
return BuildOverloadedCallExpr(S, Fn, ULE, LParenLoc, ArgExprs.data(),
ArgExprs.size(), RParenLoc, ExecConfig);
} else {
return BuildCallToMemberFunction(S, Fn, LParenLoc, ArgExprs.data(),
ArgExprs.size(), RParenLoc);
}
}
}
if (Fn->getType() == Context.UnknownAnyTy) {
ExprResult result = rebuildUnknownAnyFunction(*this, Fn);
if (result.isInvalid()) return ExprError();
Fn = result.take();
}
Expr *NakedFn = Fn->IgnoreParens();
NamedDecl *NDecl = 0;
if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(NakedFn))
if (UnOp->getOpcode() == UO_AddrOf)
NakedFn = UnOp->getSubExpr()->IgnoreParens();
if (isa<DeclRefExpr>(NakedFn))
NDecl = cast<DeclRefExpr>(NakedFn)->getDecl();
else if (isa<MemberExpr>(NakedFn))
NDecl = cast<MemberExpr>(NakedFn)->getMemberDecl();
return BuildResolvedCallExpr(Fn, NDecl, LParenLoc, ArgExprs.data(),
ArgExprs.size(), RParenLoc, ExecConfig,
IsExecConfig);
}
ExprResult
Sema::ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc,
MultiExprArg ExecConfig, SourceLocation GGGLoc) {
FunctionDecl *ConfigDecl = Context.getcudaConfigureCallDecl();
if (!ConfigDecl)
return ExprError(Diag(LLLLoc, diag::err_undeclared_var_use)
<< "cudaConfigureCall");
QualType ConfigQTy = ConfigDecl->getType();
DeclRefExpr *ConfigDR = new (Context) DeclRefExpr(
ConfigDecl, false, ConfigQTy, VK_LValue, LLLLoc);
MarkFunctionReferenced(LLLLoc, ConfigDecl);
return ActOnCallExpr(S, ConfigDR, LLLLoc, ExecConfig, GGGLoc, 0,
true);
}
ExprResult Sema::ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy,
SourceLocation BuiltinLoc,
SourceLocation RParenLoc) {
ExprValueKind VK = VK_RValue;
ExprObjectKind OK = OK_Ordinary;
QualType DstTy = GetTypeFromParser(ParsedDestTy);
QualType SrcTy = E->getType();
if (Context.getTypeSize(DstTy) != Context.getTypeSize(SrcTy))
return ExprError(Diag(BuiltinLoc,
diag::err_invalid_astype_of_different_size)
<< DstTy
<< SrcTy
<< E->getSourceRange());
return Owned(new (Context) AsTypeExpr(E, DstTy, VK, OK, BuiltinLoc,
RParenLoc));
}
ExprResult
Sema::BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
SourceLocation LParenLoc,
Expr **Args, unsigned NumArgs,
SourceLocation RParenLoc,
Expr *Config, bool IsExecConfig) {
FunctionDecl *FDecl = dyn_cast_or_null<FunctionDecl>(NDecl);
unsigned BuiltinID = (FDecl ? FDecl->getBuiltinID() : 0);
ExprResult Result;
if (BuiltinID &&
Fn->getType()->isSpecificBuiltinType(BuiltinType::BuiltinFn)) {
Result = ImpCastExprToType(Fn, Context.getPointerType(FDecl->getType()),
CK_BuiltinFnToFnPtr).take();
} else {
Result = UsualUnaryConversions(Fn);
}
if (Result.isInvalid())
return ExprError();
Fn = Result.take();
CallExpr *TheCall;
if (Config)
TheCall = new (Context) CUDAKernelCallExpr(Context, Fn,
cast<CallExpr>(Config),
llvm::makeArrayRef(Args,NumArgs),
Context.BoolTy,
VK_RValue,
RParenLoc);
else
TheCall = new (Context) CallExpr(Context, Fn,
llvm::makeArrayRef(Args, NumArgs),
Context.BoolTy,
VK_RValue,
RParenLoc);
if (BuiltinID && Context.BuiltinInfo.hasCustomTypechecking(BuiltinID))
return CheckBuiltinFunctionCall(BuiltinID, TheCall);
retry:
const FunctionType *FuncT;
if (const PointerType *PT = Fn->getType()->getAs<PointerType>()) {
FuncT = PT->getPointeeType()->getAs<FunctionType>();
if (FuncT == 0)
return ExprError(Diag(LParenLoc, diag::err_typecheck_call_not_function)
<< Fn->getType() << Fn->getSourceRange());
} else if (const BlockPointerType *BPT =
Fn->getType()->getAs<BlockPointerType>()) {
FuncT = BPT->getPointeeType()->castAs<FunctionType>();
} else {
if (Fn->getType() == Context.UnknownAnyTy) {
ExprResult rewrite = rebuildUnknownAnyFunction(*this, Fn);
if (rewrite.isInvalid()) return ExprError();
Fn = rewrite.take();
TheCall->setCallee(Fn);
goto retry;
}
return ExprError(Diag(LParenLoc, diag::err_typecheck_call_not_function)
<< Fn->getType() << Fn->getSourceRange());
}
if (getLangOpts().CUDA) {
if (Config) {
if (FDecl && !FDecl->hasAttr<CUDAGlobalAttr>())
return ExprError(Diag(LParenLoc,diag::err_kern_call_not_global_function)
<< FDecl->getName() << Fn->getSourceRange());
if (!FuncT->getResultType()->isVoidType())
return ExprError(Diag(LParenLoc, diag::err_kern_type_not_void_return)
<< Fn->getType() << Fn->getSourceRange());
} else {
if (FDecl && FDecl->hasAttr<CUDAGlobalAttr>())
return ExprError(Diag(LParenLoc, diag::err_global_call_not_config)
<< FDecl->getName() << Fn->getSourceRange());
}
}
if (CheckCallReturnType(FuncT->getResultType(),
Fn->getLocStart(), TheCall,
FDecl))
return ExprError();
TheCall->setType(FuncT->getCallResultType(Context));
TheCall->setValueKind(Expr::getValueKindForType(FuncT->getResultType()));
const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FuncT);
if (Proto) {
if (ConvertArgumentsForCall(TheCall, Fn, FDecl, Proto, Args, NumArgs,
RParenLoc, IsExecConfig))
return ExprError();
} else {
assert(isa<FunctionNoProtoType>(FuncT) && "Unknown FunctionType!");
if (FDecl) {
const FunctionDecl *Def = 0;
if (FDecl->hasBody(Def) && NumArgs != Def->param_size()) {
Proto = Def->getType()->getAs<FunctionProtoType>();
if (!Proto || !(Proto->isVariadic() && NumArgs >= Def->param_size()))
Diag(RParenLoc, diag::warn_call_wrong_number_of_arguments)
<< (NumArgs > Def->param_size()) << FDecl << Fn->getSourceRange();
}
if (!FDecl->hasPrototype())
Proto = FDecl->getType()->getAs<FunctionProtoType>();
}
for (unsigned i = 0; i != NumArgs; i++) {
Expr *Arg = Args[i];
if (Proto && i < Proto->getNumArgs()) {
InitializedEntity Entity
= InitializedEntity::InitializeParameter(Context,
Proto->getArgType(i),
Proto->isArgConsumed(i));
ExprResult ArgE = PerformCopyInitialization(Entity,
SourceLocation(),
Owned(Arg));
if (ArgE.isInvalid())
return true;
Arg = ArgE.takeAs<Expr>();
} else {
ExprResult ArgE = DefaultArgumentPromotion(Arg);
if (ArgE.isInvalid())
return true;
Arg = ArgE.takeAs<Expr>();
}
if (RequireCompleteType(Arg->getLocStart(),
Arg->getType(),
diag::err_call_incomplete_argument, Arg))
return ExprError();
TheCall->setArg(i, Arg);
}
}
if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl))
if (!Method->isStatic())
return ExprError(Diag(LParenLoc, diag::err_member_call_without_object)
<< Fn->getSourceRange());
if (NDecl)
DiagnoseSentinelCalls(NDecl, LParenLoc, Args, NumArgs);
if (FDecl) {
if (CheckFunctionCall(FDecl, TheCall, Proto))
return ExprError();
if (BuiltinID)
return CheckBuiltinFunctionCall(BuiltinID, TheCall);
} else if (NDecl) {
if (CheckBlockCall(NDecl, TheCall, Proto))
return ExprError();
}
return MaybeBindToTemporary(TheCall);
}
ExprResult
Sema::ActOnCompoundLiteral(SourceLocation LParenLoc, ParsedType Ty,
SourceLocation RParenLoc, Expr *InitExpr) {
assert((Ty != 0) && "ActOnCompoundLiteral(): missing type");
TypeSourceInfo *TInfo;
QualType literalType = GetTypeFromParser(Ty, &TInfo);
if (!TInfo)
TInfo = Context.getTrivialTypeSourceInfo(literalType);
return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, InitExpr);
}
ExprResult
Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo,
SourceLocation RParenLoc, Expr *LiteralExpr) {
QualType literalType = TInfo->getType();
if (literalType->isArrayType()) {
if (RequireCompleteType(LParenLoc, Context.getBaseElementType(literalType),
diag::err_illegal_decl_array_incomplete_type,
SourceRange(LParenLoc,
LiteralExpr->getSourceRange().getEnd())))
return ExprError();
if (literalType->isVariableArrayType())
return ExprError(Diag(LParenLoc, diag::err_variable_object_no_init)
<< SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()));
} else if (!literalType->isDependentType() &&
RequireCompleteType(LParenLoc, literalType,
diag::err_typecheck_decl_incomplete_type,
SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd())))
return ExprError();
InitializedEntity Entity
= InitializedEntity::InitializeTemporary(literalType);
InitializationKind Kind
= InitializationKind::CreateCStyleCast(LParenLoc,
SourceRange(LParenLoc, RParenLoc),
true);
InitializationSequence InitSeq(*this, Entity, Kind, &LiteralExpr, 1);
ExprResult Result = InitSeq.Perform(*this, Entity, Kind, LiteralExpr,
&literalType);
if (Result.isInvalid())
return ExprError();
LiteralExpr = Result.get();
bool isFileScope = getCurFunctionOrMethodDecl() == 0;
if (isFileScope) { if (CheckForConstantInitializer(LiteralExpr, literalType))
return ExprError();
}
ExprValueKind VK = getLangOpts().CPlusPlus ? VK_RValue : VK_LValue;
return MaybeBindToTemporary(
new (Context) CompoundLiteralExpr(LParenLoc, TInfo, literalType,
VK, LiteralExpr, isFileScope));
}
ExprResult
Sema::ActOnInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList,
SourceLocation RBraceLoc) {
for (unsigned I = 0, E = InitArgList.size(); I != E; ++I) {
if (InitArgList[I]->getType()->isNonOverloadPlaceholderType()) {
ExprResult result = CheckPlaceholderExpr(InitArgList[I]);
if (result.isInvalid()) continue;
InitArgList[I] = result.take();
}
}
InitListExpr *E = new (Context) InitListExpr(Context, LBraceLoc, InitArgList,
RBraceLoc);
E->setType(Context.VoidTy); return Owned(E);
}
static void maybeExtendBlockObject(Sema &S, ExprResult &E) {
assert(E.get()->getType()->isBlockPointerType());
assert(E.get()->isRValue());
if (!S.getLangOpts().ObjCAutoRefCount) return;
E = ImplicitCastExpr::Create(S.Context, E.get()->getType(),
CK_ARCExtendBlockObject, E.get(),
0, VK_RValue);
S.ExprNeedsCleanups = true;
}
CastKind Sema::PrepareCastToObjCObjectPointer(ExprResult &E) {
QualType type = E.get()->getType();
if (type->isObjCObjectPointerType()) {
return CK_BitCast;
} else if (type->isBlockPointerType()) {
maybeExtendBlockObject(*this, E);
return CK_BlockPointerToObjCPointerCast;
} else {
assert(type->isPointerType());
return CK_CPointerToObjCPointerCast;
}
}
CastKind Sema::PrepareScalarCast(ExprResult &Src, QualType DestTy) {
QualType SrcTy = Src.get()->getType();
if (Context.hasSameUnqualifiedType(SrcTy, DestTy))
return CK_NoOp;
switch (Type::ScalarTypeKind SrcKind = SrcTy->getScalarTypeKind()) {
case Type::STK_MemberPointer:
llvm_unreachable("member pointer type in C");
case Type::STK_CPointer:
case Type::STK_BlockPointer:
case Type::STK_ObjCObjectPointer:
switch (DestTy->getScalarTypeKind()) {
case Type::STK_CPointer:
return CK_BitCast;
case Type::STK_BlockPointer:
return (SrcKind == Type::STK_BlockPointer
? CK_BitCast : CK_AnyPointerToBlockPointerCast);
case Type::STK_ObjCObjectPointer:
if (SrcKind == Type::STK_ObjCObjectPointer)
return CK_BitCast;
if (SrcKind == Type::STK_CPointer)
return CK_CPointerToObjCPointerCast;
maybeExtendBlockObject(*this, Src);
return CK_BlockPointerToObjCPointerCast;
case Type::STK_Bool:
return CK_PointerToBoolean;
case Type::STK_Integral:
return CK_PointerToIntegral;
case Type::STK_Floating:
case Type::STK_FloatingComplex:
case Type::STK_IntegralComplex:
case Type::STK_MemberPointer:
llvm_unreachable("illegal cast from pointer");
}
llvm_unreachable("Should have returned before this");
case Type::STK_Bool: case Type::STK_Integral:
switch (DestTy->getScalarTypeKind()) {
case Type::STK_CPointer:
case Type::STK_ObjCObjectPointer:
case Type::STK_BlockPointer:
if (Src.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull))
return CK_NullToPointer;
return CK_IntegralToPointer;
case Type::STK_Bool:
return CK_IntegralToBoolean;
case Type::STK_Integral:
return CK_IntegralCast;
case Type::STK_Floating:
return CK_IntegralToFloating;
case Type::STK_IntegralComplex:
Src = ImpCastExprToType(Src.take(),
DestTy->castAs<ComplexType>()->getElementType(),
CK_IntegralCast);
return CK_IntegralRealToComplex;
case Type::STK_FloatingComplex:
Src = ImpCastExprToType(Src.take(),
DestTy->castAs<ComplexType>()->getElementType(),
CK_IntegralToFloating);
return CK_FloatingRealToComplex;
case Type::STK_MemberPointer:
llvm_unreachable("member pointer type in C");
}
llvm_unreachable("Should have returned before this");
case Type::STK_Floating:
switch (DestTy->getScalarTypeKind()) {
case Type::STK_Floating:
return CK_FloatingCast;
case Type::STK_Bool:
return CK_FloatingToBoolean;
case Type::STK_Integral:
return CK_FloatingToIntegral;
case Type::STK_FloatingComplex:
Src = ImpCastExprToType(Src.take(),
DestTy->castAs<ComplexType>()->getElementType(),
CK_FloatingCast);
return CK_FloatingRealToComplex;
case Type::STK_IntegralComplex:
Src = ImpCastExprToType(Src.take(),
DestTy->castAs<ComplexType>()->getElementType(),
CK_FloatingToIntegral);
return CK_IntegralRealToComplex;
case Type::STK_CPointer:
case Type::STK_ObjCObjectPointer:
case Type::STK_BlockPointer:
llvm_unreachable("valid float->pointer cast?");
case Type::STK_MemberPointer:
llvm_unreachable("member pointer type in C");
}
llvm_unreachable("Should have returned before this");
case Type::STK_FloatingComplex:
switch (DestTy->getScalarTypeKind()) {
case Type::STK_FloatingComplex:
return CK_FloatingComplexCast;
case Type::STK_IntegralComplex:
return CK_FloatingComplexToIntegralComplex;
case Type::STK_Floating: {
QualType ET = SrcTy->castAs<ComplexType>()->getElementType();
if (Context.hasSameType(ET, DestTy))
return CK_FloatingComplexToReal;
Src = ImpCastExprToType(Src.take(), ET, CK_FloatingComplexToReal);
return CK_FloatingCast;
}
case Type::STK_Bool:
return CK_FloatingComplexToBoolean;
case Type::STK_Integral:
Src = ImpCastExprToType(Src.take(),
SrcTy->castAs<ComplexType>()->getElementType(),
CK_FloatingComplexToReal);
return CK_FloatingToIntegral;
case Type::STK_CPointer:
case Type::STK_ObjCObjectPointer:
case Type::STK_BlockPointer:
llvm_unreachable("valid complex float->pointer cast?");
case Type::STK_MemberPointer:
llvm_unreachable("member pointer type in C");
}
llvm_unreachable("Should have returned before this");
case Type::STK_IntegralComplex:
switch (DestTy->getScalarTypeKind()) {
case Type::STK_FloatingComplex:
return CK_IntegralComplexToFloatingComplex;
case Type::STK_IntegralComplex:
return CK_IntegralComplexCast;
case Type::STK_Integral: {
QualType ET = SrcTy->castAs<ComplexType>()->getElementType();
if (Context.hasSameType(ET, DestTy))
return CK_IntegralComplexToReal;
Src = ImpCastExprToType(Src.take(), ET, CK_IntegralComplexToReal);
return CK_IntegralCast;
}
case Type::STK_Bool:
return CK_IntegralComplexToBoolean;
case Type::STK_Floating:
Src = ImpCastExprToType(Src.take(),
SrcTy->castAs<ComplexType>()->getElementType(),
CK_IntegralComplexToReal);
return CK_IntegralToFloating;
case Type::STK_CPointer:
case Type::STK_ObjCObjectPointer:
case Type::STK_BlockPointer:
llvm_unreachable("valid complex int->pointer cast?");
case Type::STK_MemberPointer:
llvm_unreachable("member pointer type in C");
}
llvm_unreachable("Should have returned before this");
}
llvm_unreachable("Unhandled scalar cast");
}
bool Sema::CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty,
CastKind &Kind) {
assert(VectorTy->isVectorType() && "Not a vector type!");
if (Ty->isVectorType() || Ty->isIntegerType()) {
if (Context.getTypeSize(VectorTy) != Context.getTypeSize(Ty))
return Diag(R.getBegin(),
Ty->isVectorType() ?
diag::err_invalid_conversion_between_vectors :
diag::err_invalid_conversion_between_vector_and_integer)
<< VectorTy << Ty << R;
} else
return Diag(R.getBegin(),
diag::err_invalid_conversion_between_vector_and_scalar)
<< VectorTy << Ty << R;
Kind = CK_BitCast;
return false;
}
ExprResult Sema::CheckExtVectorCast(SourceRange R, QualType DestTy,
Expr *CastExpr, CastKind &Kind) {
assert(DestTy->isExtVectorType() && "Not an extended vector type!");
QualType SrcTy = CastExpr->getType();
if (SrcTy->isVectorType()) {
if (Context.getTypeSize(DestTy) != Context.getTypeSize(SrcTy)
|| (getLangOpts().OpenCL &&
(DestTy.getCanonicalType() != SrcTy.getCanonicalType()))) {
Diag(R.getBegin(),diag::err_invalid_conversion_between_ext_vectors)
<< DestTy << SrcTy << R;
return ExprError();
}
Kind = CK_BitCast;
return Owned(CastExpr);
}
if (SrcTy->isPointerType())
return Diag(R.getBegin(),
diag::err_invalid_conversion_between_vector_and_scalar)
<< DestTy << SrcTy << R;
QualType DestElemTy = DestTy->getAs<ExtVectorType>()->getElementType();
ExprResult CastExprRes = Owned(CastExpr);
CastKind CK = PrepareScalarCast(CastExprRes, DestElemTy);
if (CastExprRes.isInvalid())
return ExprError();
CastExpr = ImpCastExprToType(CastExprRes.take(), DestElemTy, CK).take();
Kind = CK_VectorSplat;
return Owned(CastExpr);
}
ExprResult
Sema::ActOnCastExpr(Scope *S, SourceLocation LParenLoc,
Declarator &D, ParsedType &Ty,
SourceLocation RParenLoc, Expr *CastExpr) {
assert(!D.isInvalidType() && (CastExpr != 0) &&
"ActOnCastExpr(): missing type or expr");
TypeSourceInfo *castTInfo = GetTypeForDeclaratorCast(D, CastExpr->getType());
if (D.isInvalidType())
return ExprError();
if (getLangOpts().CPlusPlus) {
CheckExtraCXXDefaultArguments(D);
}
checkUnusedDeclAttributes(D);
QualType castType = castTInfo->getType();
Ty = CreateParsedType(castType, castTInfo);
bool isVectorLiteral = false;
ParenExpr *PE = dyn_cast<ParenExpr>(CastExpr);
ParenListExpr *PLE = dyn_cast<ParenListExpr>(CastExpr);
if ((getLangOpts().AltiVec || getLangOpts().OpenCL)
&& castType->isVectorType() && (PE || PLE)) {
if (PLE && PLE->getNumExprs() == 0) {
Diag(PLE->getExprLoc(), diag::err_altivec_empty_initializer);
return ExprError();
}
if (PE || PLE->getNumExprs() == 1) {
Expr *E = (PE ? PE->getSubExpr() : PLE->getExpr(0));
if (!E->getType()->isVectorType())
isVectorLiteral = true;
}
else
isVectorLiteral = true;
}
if (isVectorLiteral)
return BuildVectorLiteral(LParenLoc, RParenLoc, CastExpr, castTInfo);
if (isa<ParenListExpr>(CastExpr)) {
ExprResult Result = MaybeConvertParenListExprToParenExpr(S, CastExpr);
if (Result.isInvalid()) return ExprError();
CastExpr = Result.take();
}
return BuildCStyleCastExpr(LParenLoc, castTInfo, RParenLoc, CastExpr);
}
ExprResult Sema::BuildVectorLiteral(SourceLocation LParenLoc,
SourceLocation RParenLoc, Expr *E,
TypeSourceInfo *TInfo) {
assert((isa<ParenListExpr>(E) || isa<ParenExpr>(E)) &&
"Expected paren or paren list expression");
Expr **exprs;
unsigned numExprs;
Expr *subExpr;
if (ParenListExpr *PE = dyn_cast<ParenListExpr>(E)) {
exprs = PE->getExprs();
numExprs = PE->getNumExprs();
} else {
subExpr = cast<ParenExpr>(E)->getSubExpr();
exprs = &subExpr;
numExprs = 1;
}
QualType Ty = TInfo->getType();
assert(Ty->isVectorType() && "Expected vector type");
SmallVector<Expr *, 8> initExprs;
const VectorType *VTy = Ty->getAs<VectorType>();
unsigned numElems = Ty->getAs<VectorType>()->getNumElements();
if (VTy->getVectorKind() == VectorType::AltiVecVector) {
if (numExprs == 1) {
QualType ElemTy = Ty->getAs<VectorType>()->getElementType();
ExprResult Literal = DefaultLvalueConversion(exprs[0]);
if (Literal.isInvalid())
return ExprError();
Literal = ImpCastExprToType(Literal.take(), ElemTy,
PrepareScalarCast(Literal, ElemTy));
return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.take());
}
else if (numExprs < numElems) {
Diag(E->getExprLoc(),
diag::err_incorrect_number_of_vector_initializers);
return ExprError();
}
else
initExprs.append(exprs, exprs + numExprs);
}
else {
if (getLangOpts().OpenCL &&
VTy->getVectorKind() == VectorType::GenericVector &&
numExprs == 1) {
QualType ElemTy = Ty->getAs<VectorType>()->getElementType();
ExprResult Literal = DefaultLvalueConversion(exprs[0]);
if (Literal.isInvalid())
return ExprError();
Literal = ImpCastExprToType(Literal.take(), ElemTy,
PrepareScalarCast(Literal, ElemTy));
return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.take());
}
initExprs.append(exprs, exprs + numExprs);
}
InitListExpr *initE = new (Context) InitListExpr(Context, LParenLoc,
initExprs, RParenLoc);
initE->setType(Ty);
return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, initE);
}
ExprResult
Sema::MaybeConvertParenListExprToParenExpr(Scope *S, Expr *OrigExpr) {
ParenListExpr *E = dyn_cast<ParenListExpr>(OrigExpr);
if (!E)
return Owned(OrigExpr);
ExprResult Result(E->getExpr(0));
for (unsigned i = 1, e = E->getNumExprs(); i != e && !Result.isInvalid(); ++i)
Result = ActOnBinOp(S, E->getExprLoc(), tok::comma, Result.get(),
E->getExpr(i));
if (Result.isInvalid()) return ExprError();
return ActOnParenExpr(E->getLParenLoc(), E->getRParenLoc(), Result.get());
}
ExprResult Sema::ActOnParenListExpr(SourceLocation L,
SourceLocation R,
MultiExprArg Val) {
assert(Val.data() != 0 && "ActOnParenOrParenListExpr() missing expr list");
Expr *expr = new (Context) ParenListExpr(Context, L, Val, R);
return Owned(expr);
}
bool Sema::DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr,
SourceLocation QuestionLoc) {
Expr *NullExpr = LHSExpr;
Expr *NonPointerExpr = RHSExpr;
Expr::NullPointerConstantKind NullKind =
NullExpr->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNotNull);
if (NullKind == Expr::NPCK_NotNull) {
NullExpr = RHSExpr;
NonPointerExpr = LHSExpr;
NullKind =
NullExpr->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNotNull);
}
if (NullKind == Expr::NPCK_NotNull)
return false;
if (NullKind == Expr::NPCK_ZeroExpression)
return false;
if (NullKind == Expr::NPCK_ZeroLiteral) {
NullExpr = NullExpr->IgnoreParenImpCasts();
SourceLocation loc = NullExpr->getExprLoc();
if (!findMacroSpelling(loc, "NULL"))
return false;
}
int DiagType = (NullKind == Expr::NPCK_CXX0X_nullptr);
Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands_null)
<< NonPointerExpr->getType() << DiagType
<< NonPointerExpr->getSourceRange();
return true;
}
static bool checkCondition(Sema &S, Expr *Cond) {
QualType CondTy = Cond->getType();
if (CondTy->isScalarType()) return false;
if (S.getLangOpts().OpenCL && CondTy->isVectorType())
return false;
S.Diag(Cond->getLocStart(), S.getLangOpts().OpenCL ?
diag::err_typecheck_cond_expect_scalar :
diag::err_typecheck_cond_expect_scalar_or_vector)
<< CondTy;
return true;
}
static bool checkConditionalConvertScalarsToVectors(Sema &S, ExprResult &LHS,
ExprResult &RHS,
QualType CondTy) {
if (!LHS.get()->getType()->isScalarType()) {
S.Diag(LHS.get()->getLocStart(), diag::err_typecheck_cond_expect_scalar)
<< CondTy;
return true;
}
if (!RHS.get()->getType()->isScalarType()) {
S.Diag(RHS.get()->getLocStart(), diag::err_typecheck_cond_expect_scalar)
<< CondTy;
return true;
}
LHS = S.ImpCastExprToType(LHS.take(), CondTy, CK_IntegralCast);
RHS = S.ImpCastExprToType(RHS.take(), CondTy, CK_IntegralCast);
return false;
}
static QualType checkConditionalVoidType(Sema &S, ExprResult &LHS,
ExprResult &RHS) {
Expr *LHSExpr = LHS.get();
Expr *RHSExpr = RHS.get();
if (!LHSExpr->getType()->isVoidType())
S.Diag(RHSExpr->getLocStart(), diag::ext_typecheck_cond_one_void)
<< RHSExpr->getSourceRange();
if (!RHSExpr->getType()->isVoidType())
S.Diag(LHSExpr->getLocStart(), diag::ext_typecheck_cond_one_void)
<< LHSExpr->getSourceRange();
LHS = S.ImpCastExprToType(LHS.take(), S.Context.VoidTy, CK_ToVoid);
RHS = S.ImpCastExprToType(RHS.take(), S.Context.VoidTy, CK_ToVoid);
return S.Context.VoidTy;
}
static bool checkConditionalNullPointer(Sema &S, ExprResult &NullExpr,
QualType PointerTy) {
if ((!PointerTy->isAnyPointerType() && !PointerTy->isBlockPointerType()) ||
!NullExpr.get()->isNullPointerConstant(S.Context,
Expr::NPC_ValueDependentIsNull))
return true;
NullExpr = S.ImpCastExprToType(NullExpr.take(), PointerTy, CK_NullToPointer);
return false;
}
static QualType checkConditionalPointerCompatibility(Sema &S, ExprResult &LHS,
ExprResult &RHS,
SourceLocation Loc) {
QualType LHSTy = LHS.get()->getType();
QualType RHSTy = RHS.get()->getType();
if (S.Context.hasSameType(LHSTy, RHSTy)) {
return LHSTy;
}
QualType lhptee, rhptee;
if (const BlockPointerType *LHSBTy = LHSTy->getAs<BlockPointerType>()) {
lhptee = LHSBTy->getPointeeType();
rhptee = RHSTy->castAs<BlockPointerType>()->getPointeeType();
} else {
lhptee = LHSTy->castAs<PointerType>()->getPointeeType();
rhptee = RHSTy->castAs<PointerType>()->getPointeeType();
}
Qualifiers lhQual = lhptee.getQualifiers();
Qualifiers rhQual = rhptee.getQualifiers();
unsigned MergedCVRQual = lhQual.getCVRQualifiers() | rhQual.getCVRQualifiers();
lhQual.removeCVRQualifiers();
rhQual.removeCVRQualifiers();
lhptee = S.Context.getQualifiedType(lhptee.getUnqualifiedType(), lhQual);
rhptee = S.Context.getQualifiedType(rhptee.getUnqualifiedType(), rhQual);
QualType CompositeTy = S.Context.mergeTypes(lhptee, rhptee);
if (CompositeTy.isNull()) {
S.Diag(Loc, diag::warn_typecheck_cond_incompatible_pointers)
<< LHSTy << RHSTy << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
QualType incompatTy = S.Context.getPointerType(S.Context.VoidTy);
LHS = S.ImpCastExprToType(LHS.take(), incompatTy, CK_BitCast);
RHS = S.ImpCastExprToType(RHS.take(), incompatTy, CK_BitCast);
return incompatTy;
}
QualType ResultTy = CompositeTy.withCVRQualifiers(MergedCVRQual);
ResultTy = S.Context.getPointerType(ResultTy);
LHS = S.ImpCastExprToType(LHS.take(), ResultTy, CK_BitCast);
RHS = S.ImpCastExprToType(RHS.take(), ResultTy, CK_BitCast);
return ResultTy;
}
static QualType checkConditionalBlockPointerCompatibility(Sema &S,
ExprResult &LHS,
ExprResult &RHS,
SourceLocation Loc) {
QualType LHSTy = LHS.get()->getType();
QualType RHSTy = RHS.get()->getType();
if (!LHSTy->isBlockPointerType() || !RHSTy->isBlockPointerType()) {
if (LHSTy->isVoidPointerType() || RHSTy->isVoidPointerType()) {
QualType destType = S.Context.getPointerType(S.Context.VoidTy);
LHS = S.ImpCastExprToType(LHS.take(), destType, CK_BitCast);
RHS = S.ImpCastExprToType(RHS.take(), destType, CK_BitCast);
return destType;
}
S.Diag(Loc, diag::err_typecheck_cond_incompatible_operands)
<< LHSTy << RHSTy << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
return QualType();
}
return checkConditionalPointerCompatibility(S, LHS, RHS, Loc);
}
static QualType
checkConditionalObjectPointersCompatibility(Sema &S, ExprResult &LHS,
ExprResult &RHS,
SourceLocation Loc) {
QualType LHSTy = LHS.get()->getType();
QualType RHSTy = RHS.get()->getType();
QualType lhptee = LHSTy->getAs<PointerType>()->getPointeeType();
QualType rhptee = RHSTy->getAs<PointerType>()->getPointeeType();
if (lhptee->isVoidType() && rhptee->isIncompleteOrObjectType()) {
QualType destPointee
= S.Context.getQualifiedType(lhptee, rhptee.getQualifiers());
QualType destType = S.Context.getPointerType(destPointee);
LHS = S.ImpCastExprToType(LHS.take(), destType, CK_NoOp);
RHS = S.ImpCastExprToType(RHS.take(), destType, CK_BitCast);
return destType;
}
if (rhptee->isVoidType() && lhptee->isIncompleteOrObjectType()) {
QualType destPointee
= S.Context.getQualifiedType(rhptee, lhptee.getQualifiers());
QualType destType = S.Context.getPointerType(destPointee);
RHS = S.ImpCastExprToType(RHS.take(), destType, CK_NoOp);
LHS = S.ImpCastExprToType(LHS.take(), destType, CK_BitCast);
return destType;
}
return checkConditionalPointerCompatibility(S, LHS, RHS, Loc);
}
static bool checkPointerIntegerMismatch(Sema &S, ExprResult &Int,
Expr* PointerExpr, SourceLocation Loc,
bool IsIntFirstExpr) {
if (!PointerExpr->getType()->isPointerType() ||
!Int.get()->getType()->isIntegerType())
return false;
Expr *Expr1 = IsIntFirstExpr ? Int.get() : PointerExpr;
Expr *Expr2 = IsIntFirstExpr ? PointerExpr : Int.get();
S.Diag(Loc, diag::warn_typecheck_cond_pointer_integer_mismatch)
<< Expr1->getType() << Expr2->getType()
<< Expr1->getSourceRange() << Expr2->getSourceRange();
Int = S.ImpCastExprToType(Int.take(), PointerExpr->getType(),
CK_IntegralToPointer);
return true;
}
QualType Sema::CheckConditionalOperands(ExprResult &Cond, ExprResult &LHS,
ExprResult &RHS, ExprValueKind &VK,
ExprObjectKind &OK,
SourceLocation QuestionLoc) {
ExprResult LHSResult = CheckPlaceholderExpr(LHS.get());
if (!LHSResult.isUsable()) return QualType();
LHS = LHSResult;
ExprResult RHSResult = CheckPlaceholderExpr(RHS.get());
if (!RHSResult.isUsable()) return QualType();
RHS = RHSResult;
if (getLangOpts().CPlusPlus)
return CXXCheckConditionalOperands(Cond, LHS, RHS, VK, OK, QuestionLoc);
VK = VK_RValue;
OK = OK_Ordinary;
Cond = UsualUnaryConversions(Cond.take());
if (Cond.isInvalid())
return QualType();
LHS = UsualUnaryConversions(LHS.take());
if (LHS.isInvalid())
return QualType();
RHS = UsualUnaryConversions(RHS.take());
if (RHS.isInvalid())
return QualType();
QualType CondTy = Cond.get()->getType();
QualType LHSTy = LHS.get()->getType();
QualType RHSTy = RHS.get()->getType();
if (checkCondition(*this, Cond.get()))
return QualType();
if (LHSTy->isVectorType() || RHSTy->isVectorType())
return CheckVectorOperands(LHS, RHS, QuestionLoc, false);
if (getLangOpts().OpenCL && CondTy->isVectorType())
if (checkConditionalConvertScalarsToVectors(*this, LHS, RHS, CondTy))
return QualType();
if (LHSTy->isArithmeticType() && RHSTy->isArithmeticType()) {
UsualArithmeticConversions(LHS, RHS);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
return LHS.get()->getType();
}
if (const RecordType *LHSRT = LHSTy->getAs<RecordType>()) { if (const RecordType *RHSRT = RHSTy->getAs<RecordType>())
if (LHSRT->getDecl() == RHSRT->getDecl())
return LHSTy.getUnqualifiedType();
}
if (LHSTy->isVoidType() || RHSTy->isVoidType()) {
return checkConditionalVoidType(*this, LHS, RHS);
}
if (!checkConditionalNullPointer(*this, RHS, LHSTy)) return LHSTy;
if (!checkConditionalNullPointer(*this, LHS, RHSTy)) return RHSTy;
QualType compositeType = FindCompositeObjCPointerType(LHS, RHS,
QuestionLoc);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
if (!compositeType.isNull())
return compositeType;
if (LHSTy->isBlockPointerType() || RHSTy->isBlockPointerType())
return checkConditionalBlockPointerCompatibility(*this, LHS, RHS,
QuestionLoc);
if (LHSTy->isPointerType() && RHSTy->isPointerType())
return checkConditionalObjectPointersCompatibility(*this, LHS, RHS,
QuestionLoc);
if (checkPointerIntegerMismatch(*this, LHS, RHS.get(), QuestionLoc,
true))
return RHSTy;
if (checkPointerIntegerMismatch(*this, RHS, LHS.get(), QuestionLoc,
false))
return LHSTy;
if (DiagnoseConditionalForNull(LHS.get(), RHS.get(), QuestionLoc))
return QualType();
Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands)
<< LHSTy << RHSTy << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
return QualType();
}
QualType Sema::FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS,
SourceLocation QuestionLoc) {
QualType LHSTy = LHS.get()->getType();
QualType RHSTy = RHS.get()->getType();
if (LHSTy->isObjCClassType() &&
(Context.hasSameType(RHSTy, Context.getObjCClassRedefinitionType()))) {
RHS = ImpCastExprToType(RHS.take(), LHSTy, CK_CPointerToObjCPointerCast);
return LHSTy;
}
if (RHSTy->isObjCClassType() &&
(Context.hasSameType(LHSTy, Context.getObjCClassRedefinitionType()))) {
LHS = ImpCastExprToType(LHS.take(), RHSTy, CK_CPointerToObjCPointerCast);
return RHSTy;
}
if (LHSTy->isObjCIdType() &&
(Context.hasSameType(RHSTy, Context.getObjCIdRedefinitionType()))) {
RHS = ImpCastExprToType(RHS.take(), LHSTy, CK_CPointerToObjCPointerCast);
return LHSTy;
}
if (RHSTy->isObjCIdType() &&
(Context.hasSameType(LHSTy, Context.getObjCIdRedefinitionType()))) {
LHS = ImpCastExprToType(LHS.take(), RHSTy, CK_CPointerToObjCPointerCast);
return RHSTy;
}
if (Context.isObjCSelType(LHSTy) &&
(Context.hasSameType(RHSTy, Context.getObjCSelRedefinitionType()))) {
RHS = ImpCastExprToType(RHS.take(), LHSTy, CK_BitCast);
return LHSTy;
}
if (Context.isObjCSelType(RHSTy) &&
(Context.hasSameType(LHSTy, Context.getObjCSelRedefinitionType()))) {
LHS = ImpCastExprToType(LHS.take(), RHSTy, CK_BitCast);
return RHSTy;
}
if (LHSTy->isObjCObjectPointerType() && RHSTy->isObjCObjectPointerType()) {
if (Context.getCanonicalType(LHSTy) == Context.getCanonicalType(RHSTy)) {
return LHSTy;
}
const ObjCObjectPointerType *LHSOPT = LHSTy->castAs<ObjCObjectPointerType>();
const ObjCObjectPointerType *RHSOPT = RHSTy->castAs<ObjCObjectPointerType>();
QualType compositeType = LHSTy;
if (Context.canAssignObjCInterfaces(LHSOPT, RHSOPT)) {
compositeType = RHSOPT->isObjCBuiltinType() ? RHSTy : LHSTy;
} else if (Context.canAssignObjCInterfaces(RHSOPT, LHSOPT)) {
compositeType = LHSOPT->isObjCBuiltinType() ? LHSTy : RHSTy;
} else if ((LHSTy->isObjCQualifiedIdType() ||
RHSTy->isObjCQualifiedIdType()) &&
Context.ObjCQualifiedIdTypesAreCompatible(LHSTy, RHSTy, true)) {
compositeType = Context.getObjCIdType();
} else if (LHSTy->isObjCIdType() || RHSTy->isObjCIdType()) {
compositeType = Context.getObjCIdType();
} else if (!(compositeType =
Context.areCommonBaseCompatible(LHSOPT, RHSOPT)).isNull())
;
else {
Diag(QuestionLoc, diag::ext_typecheck_cond_incompatible_operands)
<< LHSTy << RHSTy
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
QualType incompatTy = Context.getObjCIdType();
LHS = ImpCastExprToType(LHS.take(), incompatTy, CK_BitCast);
RHS = ImpCastExprToType(RHS.take(), incompatTy, CK_BitCast);
return incompatTy;
}
LHS = ImpCastExprToType(LHS.take(), compositeType, CK_BitCast);
RHS = ImpCastExprToType(RHS.take(), compositeType, CK_BitCast);
return compositeType;
}
if (LHSTy->isVoidPointerType() && RHSTy->isObjCObjectPointerType()) {
if (getLangOpts().ObjCAutoRefCount) {
Diag(QuestionLoc, diag::err_cond_voidptr_arc) << LHSTy << RHSTy
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
LHS = RHS = true;
return QualType();
}
QualType lhptee = LHSTy->getAs<PointerType>()->getPointeeType();
QualType rhptee = RHSTy->getAs<ObjCObjectPointerType>()->getPointeeType();
QualType destPointee
= Context.getQualifiedType(lhptee, rhptee.getQualifiers());
QualType destType = Context.getPointerType(destPointee);
LHS = ImpCastExprToType(LHS.take(), destType, CK_NoOp);
RHS = ImpCastExprToType(RHS.take(), destType, CK_BitCast);
return destType;
}
if (LHSTy->isObjCObjectPointerType() && RHSTy->isVoidPointerType()) {
if (getLangOpts().ObjCAutoRefCount) {
Diag(QuestionLoc, diag::err_cond_voidptr_arc) << LHSTy << RHSTy
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
LHS = RHS = true;
return QualType();
}
QualType lhptee = LHSTy->getAs<ObjCObjectPointerType>()->getPointeeType();
QualType rhptee = RHSTy->getAs<PointerType>()->getPointeeType();
QualType destPointee
= Context.getQualifiedType(rhptee, lhptee.getQualifiers());
QualType destType = Context.getPointerType(destPointee);
RHS = ImpCastExprToType(RHS.take(), destType, CK_NoOp);
LHS = ImpCastExprToType(LHS.take(), destType, CK_BitCast);
return destType;
}
return QualType();
}
static void SuggestParentheses(Sema &Self, SourceLocation Loc,
const PartialDiagnostic &Note,
SourceRange ParenRange) {
SourceLocation EndLoc = Self.PP.getLocForEndOfToken(ParenRange.getEnd());
if (ParenRange.getBegin().isFileID() && ParenRange.getEnd().isFileID() &&
EndLoc.isValid()) {
Self.Diag(Loc, Note)
<< FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
<< FixItHint::CreateInsertion(EndLoc, ")");
} else {
Self.Diag(Loc, Note) << ParenRange;
}
}
static bool IsArithmeticOp(BinaryOperatorKind Opc) {
return Opc >= BO_Mul && Opc <= BO_Shr;
}
static bool IsArithmeticBinaryExpr(Expr *E, BinaryOperatorKind *Opcode,
Expr **RHSExprs) {
E = E->IgnoreImpCasts();
E = E->IgnoreConversionOperator();
E = E->IgnoreImpCasts();
if (BinaryOperator *OP = dyn_cast<BinaryOperator>(E)) {
if (IsArithmeticOp(OP->getOpcode())) {
*Opcode = OP->getOpcode();
*RHSExprs = OP->getRHS();
return true;
}
}
if (CXXOperatorCallExpr *Call = dyn_cast<CXXOperatorCallExpr>(E)) {
if (Call->getNumArgs() != 2)
return false;
OverloadedOperatorKind OO = Call->getOperator();
if (OO < OO_Plus || OO > OO_Arrow)
return false;
BinaryOperatorKind OpKind = BinaryOperator::getOverloadedOpcode(OO);
if (IsArithmeticOp(OpKind)) {
*Opcode = OpKind;
*RHSExprs = Call->getArg(1);
return true;
}
}
return false;
}
static bool IsLogicOp(BinaryOperatorKind Opc) {
return (Opc >= BO_LT && Opc <= BO_NE) || (Opc >= BO_LAnd && Opc <= BO_LOr);
}
static bool ExprLooksBoolean(Expr *E) {
E = E->IgnoreParenImpCasts();
if (E->getType()->isBooleanType())
return true;
if (BinaryOperator *OP = dyn_cast<BinaryOperator>(E))
return IsLogicOp(OP->getOpcode());
if (UnaryOperator *OP = dyn_cast<UnaryOperator>(E))
return OP->getOpcode() == UO_LNot;
return false;
}
static void DiagnoseConditionalPrecedence(Sema &Self,
SourceLocation OpLoc,
Expr *Condition,
Expr *LHSExpr,
Expr *RHSExpr) {
BinaryOperatorKind CondOpcode;
Expr *CondRHS;
if (!IsArithmeticBinaryExpr(Condition, &CondOpcode, &CondRHS))
return;
if (!ExprLooksBoolean(CondRHS))
return;
Self.Diag(OpLoc, diag::warn_precedence_conditional)
<< Condition->getSourceRange()
<< BinaryOperator::getOpcodeStr(CondOpcode);
SuggestParentheses(Self, OpLoc,
Self.PDiag(diag::note_precedence_conditional_silence)
<< BinaryOperator::getOpcodeStr(CondOpcode),
SourceRange(Condition->getLocStart(), Condition->getLocEnd()));
SuggestParentheses(Self, OpLoc,
Self.PDiag(diag::note_precedence_conditional_first),
SourceRange(CondRHS->getLocStart(), RHSExpr->getLocEnd()));
}
ExprResult Sema::ActOnConditionalOp(SourceLocation QuestionLoc,
SourceLocation ColonLoc,
Expr *CondExpr, Expr *LHSExpr,
Expr *RHSExpr) {
OpaqueValueExpr *opaqueValue = 0;
Expr *commonExpr = 0;
if (LHSExpr == 0) {
commonExpr = CondExpr;
if (!(getLangOpts().CPlusPlus
&& !commonExpr->isTypeDependent()
&& commonExpr->getValueKind() == RHSExpr->getValueKind()
&& commonExpr->isGLValue()
&& commonExpr->isOrdinaryOrBitFieldObject()
&& RHSExpr->isOrdinaryOrBitFieldObject()
&& Context.hasSameType(commonExpr->getType(), RHSExpr->getType()))) {
ExprResult commonRes = UsualUnaryConversions(commonExpr);
if (commonRes.isInvalid())
return ExprError();
commonExpr = commonRes.take();
}
opaqueValue = new (Context) OpaqueValueExpr(commonExpr->getExprLoc(),
commonExpr->getType(),
commonExpr->getValueKind(),
commonExpr->getObjectKind(),
commonExpr);
LHSExpr = CondExpr = opaqueValue;
}
ExprValueKind VK = VK_RValue;
ExprObjectKind OK = OK_Ordinary;
ExprResult Cond = Owned(CondExpr), LHS = Owned(LHSExpr), RHS = Owned(RHSExpr);
QualType result = CheckConditionalOperands(Cond, LHS, RHS,
VK, OK, QuestionLoc);
if (result.isNull() || Cond.isInvalid() || LHS.isInvalid() ||
RHS.isInvalid())
return ExprError();
DiagnoseConditionalPrecedence(*this, QuestionLoc, Cond.get(), LHS.get(),
RHS.get());
if (!commonExpr)
return Owned(new (Context) ConditionalOperator(Cond.take(), QuestionLoc,
LHS.take(), ColonLoc,
RHS.take(), result, VK, OK));
return Owned(new (Context)
BinaryConditionalOperator(commonExpr, opaqueValue, Cond.take(), LHS.take(),
RHS.take(), QuestionLoc, ColonLoc, result, VK,
OK));
}
static Sema::AssignConvertType
checkPointerTypesForAssignment(Sema &S, QualType LHSType, QualType RHSType) {
assert(LHSType.isCanonical() && "LHS not canonicalized!");
assert(RHSType.isCanonical() && "RHS not canonicalized!");
const Type *lhptee, *rhptee;
Qualifiers lhq, rhq;
llvm::tie(lhptee, lhq) = cast<PointerType>(LHSType)->getPointeeType().split();
llvm::tie(rhptee, rhq) = cast<PointerType>(RHSType)->getPointeeType().split();
Sema::AssignConvertType ConvTy = Sema::Compatible;
Qualifiers lq;
if (lhq.getObjCLifetime() != rhq.getObjCLifetime() &&
lhq.compatiblyIncludesObjCLifetime(rhq)) {
lhq.removeObjCLifetime();
rhq.removeObjCLifetime();
}
if (!lhq.compatiblyIncludes(rhq)) {
if (lhq.getAddressSpace() != rhq.getAddressSpace())
ConvTy = Sema::IncompatiblePointerDiscardsQualifiers;
else if (lhq.withoutObjCGCAttr().withoutObjCLifetime()
.compatiblyIncludes(
rhq.withoutObjCGCAttr().withoutObjCLifetime())
&& (lhptee->isVoidType() || rhptee->isVoidType()))
;
else if (lhq.getObjCLifetime() != rhq.getObjCLifetime())
ConvTy = Sema::IncompatiblePointerDiscardsQualifiers;
else ConvTy = Sema::CompatiblePointerDiscardsQualifiers;
}
if (lhptee->isVoidType()) {
if (rhptee->isIncompleteOrObjectType())
return ConvTy;
assert(rhptee->isFunctionType());
return Sema::FunctionVoidPointer;
}
if (rhptee->isVoidType()) {
if (lhptee->isIncompleteOrObjectType())
return ConvTy;
assert(lhptee->isFunctionType());
return Sema::FunctionVoidPointer;
}
QualType ltrans = QualType(lhptee, 0), rtrans = QualType(rhptee, 0);
if (!S.Context.typesAreCompatible(ltrans, rtrans)) {
if (lhptee->isCharType())
ltrans = S.Context.UnsignedCharTy;
else if (lhptee->hasSignedIntegerRepresentation())
ltrans = S.Context.getCorrespondingUnsignedType(ltrans);
if (rhptee->isCharType())
rtrans = S.Context.UnsignedCharTy;
else if (rhptee->hasSignedIntegerRepresentation())
rtrans = S.Context.getCorrespondingUnsignedType(rtrans);
if (ltrans == rtrans) {
if (ConvTy != Sema::Compatible)
return ConvTy;
return Sema::IncompatiblePointerSign;
}
if (isa<PointerType>(lhptee) && isa<PointerType>(rhptee)) {
do {
lhptee = cast<PointerType>(lhptee)->getPointeeType().getTypePtr();
rhptee = cast<PointerType>(rhptee)->getPointeeType().getTypePtr();
} while (isa<PointerType>(lhptee) && isa<PointerType>(rhptee));
if (lhptee == rhptee)
return Sema::IncompatibleNestedPointerQualifiers;
}
return Sema::IncompatiblePointer;
}
if (!S.getLangOpts().CPlusPlus &&
S.IsNoReturnConversion(ltrans, rtrans, ltrans))
return Sema::IncompatiblePointer;
return ConvTy;
}
static Sema::AssignConvertType
checkBlockPointerTypesForAssignment(Sema &S, QualType LHSType,
QualType RHSType) {
assert(LHSType.isCanonical() && "LHS not canonicalized!");
assert(RHSType.isCanonical() && "RHS not canonicalized!");
QualType lhptee, rhptee;
lhptee = cast<BlockPointerType>(LHSType)->getPointeeType();
rhptee = cast<BlockPointerType>(RHSType)->getPointeeType();
if (S.getLangOpts().CPlusPlus)
return Sema::IncompatibleBlockPointer;
Sema::AssignConvertType ConvTy = Sema::Compatible;
if (lhptee.getLocalQualifiers() != rhptee.getLocalQualifiers())
ConvTy = Sema::CompatiblePointerDiscardsQualifiers;
if (!S.Context.typesAreBlockPointerCompatible(LHSType, RHSType))
return Sema::IncompatibleBlockPointer;
return ConvTy;
}
static Sema::AssignConvertType
checkObjCPointerTypesForAssignment(Sema &S, QualType LHSType,
QualType RHSType) {
assert(LHSType.isCanonical() && "LHS was not canonicalized!");
assert(RHSType.isCanonical() && "RHS was not canonicalized!");
if (LHSType->isObjCBuiltinType()) {
if (LHSType->isObjCClassType() && !RHSType->isObjCBuiltinType() &&
!RHSType->isObjCQualifiedClassType())
return Sema::IncompatiblePointer;
return Sema::Compatible;
}
if (RHSType->isObjCBuiltinType()) {
if (RHSType->isObjCClassType() && !LHSType->isObjCBuiltinType() &&
!LHSType->isObjCQualifiedClassType())
return Sema::IncompatiblePointer;
return Sema::Compatible;
}
QualType lhptee = LHSType->getAs<ObjCObjectPointerType>()->getPointeeType();
QualType rhptee = RHSType->getAs<ObjCObjectPointerType>()->getPointeeType();
if (!lhptee.isAtLeastAsQualifiedAs(rhptee) &&
!LHSType->isObjCQualifiedIdType())
return Sema::CompatiblePointerDiscardsQualifiers;
if (S.Context.typesAreCompatible(LHSType, RHSType))
return Sema::Compatible;
if (LHSType->isObjCQualifiedIdType() || RHSType->isObjCQualifiedIdType())
return Sema::IncompatibleObjCQualifiedId;
return Sema::IncompatiblePointer;
}
Sema::AssignConvertType
Sema::CheckAssignmentConstraints(SourceLocation Loc,
QualType LHSType, QualType RHSType) {
OpaqueValueExpr RHSExpr(Loc, RHSType, VK_RValue);
ExprResult RHSPtr = &RHSExpr;
CastKind K = CK_Invalid;
return CheckAssignmentConstraints(LHSType, RHSPtr, K);
}
Sema::AssignConvertType
Sema::CheckAssignmentConstraints(QualType LHSType, ExprResult &RHS,
CastKind &Kind) {
QualType RHSType = RHS.get()->getType();
QualType OrigLHSType = LHSType;
LHSType = Context.getCanonicalType(LHSType).getUnqualifiedType();
RHSType = Context.getCanonicalType(RHSType).getUnqualifiedType();
if (LHSType == RHSType) {
Kind = CK_NoOp;
return Compatible;
}
if (const AtomicType *AtomicTy = dyn_cast<AtomicType>(LHSType)) {
Sema::AssignConvertType result =
CheckAssignmentConstraints(AtomicTy->getValueType(), RHS, Kind);
if (result != Compatible)
return result;
if (Kind != CK_NoOp)
RHS = ImpCastExprToType(RHS.take(), AtomicTy->getValueType(), Kind);
Kind = CK_NonAtomicToAtomic;
return Compatible;
}
if (const ReferenceType *LHSTypeRef = LHSType->getAs<ReferenceType>()) {
if (Context.typesAreCompatible(LHSTypeRef->getPointeeType(), RHSType)) {
Kind = CK_LValueBitCast;
return Compatible;
}
return Incompatible;
}
if (LHSType->isExtVectorType()) {
if (RHSType->isExtVectorType())
return Incompatible;
if (RHSType->isArithmeticType()) {
QualType elType = cast<ExtVectorType>(LHSType)->getElementType();
if (elType != RHSType) {
Kind = PrepareScalarCast(RHS, elType);
RHS = ImpCastExprToType(RHS.take(), elType, Kind);
}
Kind = CK_VectorSplat;
return Compatible;
}
}
if (LHSType->isVectorType() || RHSType->isVectorType()) {
if (LHSType->isVectorType() && RHSType->isVectorType()) {
if (Context.areCompatibleVectorTypes(LHSType, RHSType)) {
Kind = CK_BitCast;
return Compatible;
}
if (getLangOpts().LaxVectorConversions &&
(Context.getTypeSize(LHSType) == Context.getTypeSize(RHSType))) {
Kind = CK_BitCast;
return IncompatibleVectors;
}
}
return Incompatible;
}
if (LHSType->isArithmeticType() && RHSType->isArithmeticType() &&
!(getLangOpts().CPlusPlus && LHSType->isEnumeralType())) {
Kind = PrepareScalarCast(RHS, LHSType);
return Compatible;
}
if (const PointerType *LHSPointer = dyn_cast<PointerType>(LHSType)) {
if (isa<PointerType>(RHSType)) {
Kind = CK_BitCast;
return checkPointerTypesForAssignment(*this, LHSType, RHSType);
}
if (RHSType->isIntegerType()) {
Kind = CK_IntegralToPointer; return IntToPointer;
}
if (isa<ObjCObjectPointerType>(RHSType)) {
if (LHSPointer->getPointeeType()->isVoidType()) {
Kind = CK_BitCast;
return Compatible;
}
if (RHSType->isObjCClassType() &&
Context.hasSameType(LHSType,
Context.getObjCClassRedefinitionType())) {
Kind = CK_BitCast;
return Compatible;
}
Kind = CK_BitCast;
return IncompatiblePointer;
}
if (RHSType->getAs<BlockPointerType>()) {
if (LHSPointer->getPointeeType()->isVoidType()) {
Kind = CK_BitCast;
return Compatible;
}
}
return Incompatible;
}
if (isa<BlockPointerType>(LHSType)) {
if (RHSType->isBlockPointerType()) {
Kind = CK_BitCast;
return checkBlockPointerTypesForAssignment(*this, LHSType, RHSType);
}
if (RHSType->isIntegerType()) {
Kind = CK_IntegralToPointer; return IntToBlockPointer;
}
if (getLangOpts().ObjC1 && RHSType->isObjCIdType()) {
Kind = CK_AnyPointerToBlockPointerCast;
return Compatible;
}
if (const PointerType *RHSPT = RHSType->getAs<PointerType>())
if (RHSPT->getPointeeType()->isVoidType()) {
Kind = CK_AnyPointerToBlockPointerCast;
return Compatible;
}
return Incompatible;
}
if (isa<ObjCObjectPointerType>(LHSType)) {
if (RHSType->isObjCObjectPointerType()) {
Kind = CK_BitCast;
Sema::AssignConvertType result =
checkObjCPointerTypesForAssignment(*this, LHSType, RHSType);
if (getLangOpts().ObjCAutoRefCount &&
result == Compatible &&
!CheckObjCARCUnavailableWeakConversion(OrigLHSType, RHSType))
result = IncompatibleObjCWeakRef;
return result;
}
if (RHSType->isIntegerType()) {
Kind = CK_IntegralToPointer; return IntToPointer;
}
if (isa<PointerType>(RHSType)) {
Kind = CK_CPointerToObjCPointerCast;
if (RHSType->isVoidPointerType()) {
return Compatible;
}
if (LHSType->isObjCClassType() &&
Context.hasSameType(RHSType,
Context.getObjCClassRedefinitionType())) {
return Compatible;
}
return IncompatiblePointer;
}
if (RHSType->isBlockPointerType()) {
maybeExtendBlockObject(*this, RHS);
Kind = CK_BlockPointerToObjCPointerCast;
return Compatible;
}
return Incompatible;
}
if (isa<PointerType>(RHSType)) {
if (LHSType == Context.BoolTy) {
Kind = CK_PointerToBoolean;
return Compatible;
}
if (LHSType->isIntegerType()) {
Kind = CK_PointerToIntegral;
return PointerToInt;
}
return Incompatible;
}
if (isa<ObjCObjectPointerType>(RHSType)) {
if (LHSType == Context.BoolTy) {
Kind = CK_PointerToBoolean;
return Compatible;
}
if (LHSType->isIntegerType()) {
Kind = CK_PointerToIntegral;
return PointerToInt;
}
return Incompatible;
}
if (isa<TagType>(LHSType) && isa<TagType>(RHSType)) {
if (Context.typesAreCompatible(LHSType, RHSType)) {
Kind = CK_NoOp;
return Compatible;
}
}
return Incompatible;
}
static void ConstructTransparentUnion(Sema &S, ASTContext &C,
ExprResult &EResult, QualType UnionType,
FieldDecl *Field) {
Expr *E = EResult.take();
InitListExpr *Initializer = new (C) InitListExpr(C, SourceLocation(),
E, SourceLocation());
Initializer->setType(UnionType);
Initializer->setInitializedFieldInUnion(Field);
TypeSourceInfo *unionTInfo = C.getTrivialTypeSourceInfo(UnionType);
EResult = S.Owned(
new (C) CompoundLiteralExpr(SourceLocation(), unionTInfo, UnionType,
VK_RValue, Initializer, false));
}
Sema::AssignConvertType
Sema::CheckTransparentUnionArgumentConstraints(QualType ArgType,
ExprResult &RHS) {
QualType RHSType = RHS.get()->getType();
const RecordType *UT = ArgType->getAsUnionType();
if (!UT || !UT->getDecl()->hasAttr<TransparentUnionAttr>())
return Incompatible;
RecordDecl *UD = UT->getDecl();
FieldDecl *InitField = 0;
for (RecordDecl::field_iterator it = UD->field_begin(),
itend = UD->field_end();
it != itend; ++it) {
if (it->getType()->isPointerType()) {
if (RHSType->isPointerType())
if (RHSType->castAs<PointerType>()->getPointeeType()->isVoidType()) {
RHS = ImpCastExprToType(RHS.take(), it->getType(), CK_BitCast);
InitField = *it;
break;
}
if (RHS.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull)) {
RHS = ImpCastExprToType(RHS.take(), it->getType(),
CK_NullToPointer);
InitField = *it;
break;
}
}
CastKind Kind = CK_Invalid;
if (CheckAssignmentConstraints(it->getType(), RHS, Kind)
== Compatible) {
RHS = ImpCastExprToType(RHS.take(), it->getType(), Kind);
InitField = *it;
break;
}
}
if (!InitField)
return Incompatible;
ConstructTransparentUnion(*this, Context, RHS, ArgType, InitField);
return Compatible;
}
Sema::AssignConvertType
Sema::CheckSingleAssignmentConstraints(QualType LHSType, ExprResult &RHS,
bool Diagnose) {
if (getLangOpts().CPlusPlus) {
if (!LHSType->isRecordType() && !LHSType->isAtomicType()) {
ExprResult Res;
if (Diagnose) {
Res = PerformImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(),
AA_Assigning);
} else {
ImplicitConversionSequence ICS =
TryImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(),
false,
false,
false,
false,
false);
if (ICS.isFailure())
return Incompatible;
Res = PerformImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(),
ICS, AA_Assigning);
}
if (Res.isInvalid())
return Incompatible;
Sema::AssignConvertType result = Compatible;
if (getLangOpts().ObjCAutoRefCount &&
!CheckObjCARCUnavailableWeakConversion(LHSType,
RHS.get()->getType()))
result = IncompatibleObjCWeakRef;
RHS = Res;
return result;
}
}
if ((LHSType->isPointerType() ||
LHSType->isObjCObjectPointerType() ||
LHSType->isBlockPointerType())
&& RHS.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull)) {
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_NullToPointer);
return Compatible;
}
if (!LHSType->isReferenceType()) {
RHS = DefaultFunctionArrayLvalueConversion(RHS.take());
if (RHS.isInvalid())
return Incompatible;
}
CastKind Kind = CK_Invalid;
Sema::AssignConvertType result =
CheckAssignmentConstraints(LHSType, RHS, Kind);
if (result != Incompatible && RHS.get()->getType() != LHSType)
RHS = ImpCastExprToType(RHS.take(),
LHSType.getNonLValueExprType(Context), Kind);
return result;
}
QualType Sema::InvalidOperands(SourceLocation Loc, ExprResult &LHS,
ExprResult &RHS) {
Diag(Loc, diag::err_typecheck_invalid_operands)
<< LHS.get()->getType() << RHS.get()->getType()
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
return QualType();
}
QualType Sema::CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc, bool IsCompAssign) {
if (!IsCompAssign) {
LHS = DefaultFunctionArrayLvalueConversion(LHS.take());
if (LHS.isInvalid())
return QualType();
}
RHS = DefaultFunctionArrayLvalueConversion(RHS.take());
if (RHS.isInvalid())
return QualType();
QualType LHSType =
Context.getCanonicalType(LHS.get()->getType()).getUnqualifiedType();
QualType RHSType =
Context.getCanonicalType(RHS.get()->getType()).getUnqualifiedType();
if (LHSType == RHSType)
return LHSType;
if (LHSType->isVectorType() && RHSType->isVectorType() &&
Context.areCompatibleVectorTypes(LHSType, RHSType)) {
if (LHSType->isExtVectorType()) {
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_BitCast);
return LHSType;
}
if (!IsCompAssign)
LHS = ImpCastExprToType(LHS.take(), RHSType, CK_BitCast);
return RHSType;
}
if (getLangOpts().LaxVectorConversions &&
Context.getTypeSize(LHSType) == Context.getTypeSize(RHSType)) {
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_BitCast);
return LHSType;
}
bool swapped = false;
if (RHSType->isExtVectorType() && !IsCompAssign) {
swapped = true;
std::swap(RHS, LHS);
std::swap(RHSType, LHSType);
}
if (const ExtVectorType *LV = LHSType->getAs<ExtVectorType>()) {
QualType EltTy = LV->getElementType();
if (EltTy->isIntegralType(Context) && RHSType->isIntegralType(Context)) {
int order = Context.getIntegerTypeOrder(EltTy, RHSType);
if (order > 0)
RHS = ImpCastExprToType(RHS.take(), EltTy, CK_IntegralCast);
if (order >= 0) {
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_VectorSplat);
if (swapped) std::swap(RHS, LHS);
return LHSType;
}
}
if (EltTy->isRealFloatingType() && RHSType->isScalarType() &&
RHSType->isRealFloatingType()) {
int order = Context.getFloatingTypeOrder(EltTy, RHSType);
if (order > 0)
RHS = ImpCastExprToType(RHS.take(), EltTy, CK_FloatingCast);
if (order >= 0) {
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_VectorSplat);
if (swapped) std::swap(RHS, LHS);
return LHSType;
}
}
}
if (swapped) std::swap(RHS, LHS);
Diag(Loc, diag::err_typecheck_vector_not_convertable)
<< LHS.get()->getType() << RHS.get()->getType()
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
return QualType();
}
static void checkArithmeticNull(Sema &S, ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc, bool IsCompare) {
bool LHSNull = isa<GNUNullExpr>(LHS.get()->IgnoreParenImpCasts());
bool RHSNull = isa<GNUNullExpr>(RHS.get()->IgnoreParenImpCasts());
QualType NonNullType = LHSNull ? RHS.get()->getType() : LHS.get()->getType();
if ((!LHSNull && !RHSNull) || NonNullType->isBlockPointerType() ||
NonNullType->isMemberPointerType() || NonNullType->isFunctionType())
return;
if (!IsCompare) {
S.Diag(Loc, diag::warn_null_in_arithmetic_operation)
<< (LHSNull ? LHS.get()->getSourceRange() : SourceRange())
<< (RHSNull ? RHS.get()->getSourceRange() : SourceRange());
return;
}
if (LHSNull == RHSNull || NonNullType->isAnyPointerType() ||
NonNullType->canDecayToPointerType())
return;
S.Diag(Loc, diag::warn_null_in_comparison_operation)
<< LHSNull << NonNullType
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
}
QualType Sema::CheckMultiplyDivideOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc,
bool IsCompAssign, bool IsDiv) {
checkArithmeticNull(*this, LHS, RHS, Loc, false);
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType())
return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign);
QualType compType = UsualArithmeticConversions(LHS, RHS, IsCompAssign);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
if (compType.isNull() || !compType->isArithmeticType())
return InvalidOperands(Loc, LHS, RHS);
if (IsDiv &&
RHS.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNotNull))
DiagRuntimeBehavior(Loc, RHS.get(), PDiag(diag::warn_division_by_zero)
<< RHS.get()->getSourceRange());
return compType;
}
QualType Sema::CheckRemainderOperands(
ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign) {
checkArithmeticNull(*this, LHS, RHS, Loc, false);
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType()) {
if (LHS.get()->getType()->hasIntegerRepresentation() &&
RHS.get()->getType()->hasIntegerRepresentation())
return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign);
return InvalidOperands(Loc, LHS, RHS);
}
QualType compType = UsualArithmeticConversions(LHS, RHS, IsCompAssign);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
if (compType.isNull() || !compType->isIntegerType())
return InvalidOperands(Loc, LHS, RHS);
if (RHS.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNotNull))
DiagRuntimeBehavior(Loc, RHS.get(), PDiag(diag::warn_remainder_by_zero)
<< RHS.get()->getSourceRange());
return compType;
}
static void diagnoseArithmeticOnTwoVoidPointers(Sema &S, SourceLocation Loc,
Expr *LHSExpr, Expr *RHSExpr) {
S.Diag(Loc, S.getLangOpts().CPlusPlus
? diag::err_typecheck_pointer_arith_void_type
: diag::ext_gnu_void_ptr)
<< 1 << LHSExpr->getSourceRange()
<< RHSExpr->getSourceRange();
}
static void diagnoseArithmeticOnVoidPointer(Sema &S, SourceLocation Loc,
Expr *Pointer) {
S.Diag(Loc, S.getLangOpts().CPlusPlus
? diag::err_typecheck_pointer_arith_void_type
: diag::ext_gnu_void_ptr)
<< 0 << Pointer->getSourceRange();
}
static void diagnoseArithmeticOnTwoFunctionPointers(Sema &S, SourceLocation Loc,
Expr *LHS, Expr *RHS) {
assert(LHS->getType()->isAnyPointerType());
assert(RHS->getType()->isAnyPointerType());
S.Diag(Loc, S.getLangOpts().CPlusPlus
? diag::err_typecheck_pointer_arith_function_type
: diag::ext_gnu_ptr_func_arith)
<< 1 << LHS->getType()->getPointeeType()
<< (unsigned)!S.Context.hasSameUnqualifiedType(LHS->getType(),
RHS->getType())
<< RHS->getType()->getPointeeType()
<< LHS->getSourceRange() << RHS->getSourceRange();
}
static void diagnoseArithmeticOnFunctionPointer(Sema &S, SourceLocation Loc,
Expr *Pointer) {
assert(Pointer->getType()->isAnyPointerType());
S.Diag(Loc, S.getLangOpts().CPlusPlus
? diag::err_typecheck_pointer_arith_function_type
: diag::ext_gnu_ptr_func_arith)
<< 0 << Pointer->getType()->getPointeeType()
<< 0
<< Pointer->getSourceRange();
}
static bool checkArithmeticIncompletePointerType(Sema &S, SourceLocation Loc,
Expr *Operand) {
assert(Operand->getType()->isAnyPointerType() &&
!Operand->getType()->isDependentType());
QualType PointeeTy = Operand->getType()->getPointeeType();
return S.RequireCompleteType(Loc, PointeeTy,
diag::err_typecheck_arithmetic_incomplete_type,
PointeeTy, Operand->getSourceRange());
}
static bool checkArithmeticOpPointerOperand(Sema &S, SourceLocation Loc,
Expr *Operand) {
if (!Operand->getType()->isAnyPointerType()) return true;
QualType PointeeTy = Operand->getType()->getPointeeType();
if (PointeeTy->isVoidType()) {
diagnoseArithmeticOnVoidPointer(S, Loc, Operand);
return !S.getLangOpts().CPlusPlus;
}
if (PointeeTy->isFunctionType()) {
diagnoseArithmeticOnFunctionPointer(S, Loc, Operand);
return !S.getLangOpts().CPlusPlus;
}
if (checkArithmeticIncompletePointerType(S, Loc, Operand)) return false;
return true;
}
static bool checkArithmeticBinOpPointerOperands(Sema &S, SourceLocation Loc,
Expr *LHSExpr, Expr *RHSExpr) {
bool isLHSPointer = LHSExpr->getType()->isAnyPointerType();
bool isRHSPointer = RHSExpr->getType()->isAnyPointerType();
if (!isLHSPointer && !isRHSPointer) return true;
QualType LHSPointeeTy, RHSPointeeTy;
if (isLHSPointer) LHSPointeeTy = LHSExpr->getType()->getPointeeType();
if (isRHSPointer) RHSPointeeTy = RHSExpr->getType()->getPointeeType();
bool isLHSVoidPtr = isLHSPointer && LHSPointeeTy->isVoidType();
bool isRHSVoidPtr = isRHSPointer && RHSPointeeTy->isVoidType();
if (isLHSVoidPtr || isRHSVoidPtr) {
if (!isRHSVoidPtr) diagnoseArithmeticOnVoidPointer(S, Loc, LHSExpr);
else if (!isLHSVoidPtr) diagnoseArithmeticOnVoidPointer(S, Loc, RHSExpr);
else diagnoseArithmeticOnTwoVoidPointers(S, Loc, LHSExpr, RHSExpr);
return !S.getLangOpts().CPlusPlus;
}
bool isLHSFuncPtr = isLHSPointer && LHSPointeeTy->isFunctionType();
bool isRHSFuncPtr = isRHSPointer && RHSPointeeTy->isFunctionType();
if (isLHSFuncPtr || isRHSFuncPtr) {
if (!isRHSFuncPtr) diagnoseArithmeticOnFunctionPointer(S, Loc, LHSExpr);
else if (!isLHSFuncPtr) diagnoseArithmeticOnFunctionPointer(S, Loc,
RHSExpr);
else diagnoseArithmeticOnTwoFunctionPointers(S, Loc, LHSExpr, RHSExpr);
return !S.getLangOpts().CPlusPlus;
}
if (isLHSPointer && checkArithmeticIncompletePointerType(S, Loc, LHSExpr))
return false;
if (isRHSPointer && checkArithmeticIncompletePointerType(S, Loc, RHSExpr))
return false;
return true;
}
static void diagnoseStringPlusInt(Sema &Self, SourceLocation OpLoc,
Expr *LHSExpr, Expr *RHSExpr) {
StringLiteral* StrExpr = dyn_cast<StringLiteral>(LHSExpr->IgnoreImpCasts());
Expr* IndexExpr = RHSExpr;
if (!StrExpr) {
StrExpr = dyn_cast<StringLiteral>(RHSExpr->IgnoreImpCasts());
IndexExpr = LHSExpr;
}
bool IsStringPlusInt = StrExpr &&
IndexExpr->getType()->isIntegralOrUnscopedEnumerationType();
if (!IsStringPlusInt)
return;
llvm::APSInt index;
if (IndexExpr->EvaluateAsInt(index, Self.getASTContext())) {
unsigned StrLenWithNull = StrExpr->getLength() + 1;
if (index.isNonNegative() &&
index <= llvm::APSInt(llvm::APInt(index.getBitWidth(), StrLenWithNull),
index.isUnsigned()))
return;
}
SourceRange DiagRange(LHSExpr->getLocStart(), RHSExpr->getLocEnd());
Self.Diag(OpLoc, diag::warn_string_plus_int)
<< DiagRange << IndexExpr->IgnoreImpCasts()->getType();
if (IndexExpr == RHSExpr) {
SourceLocation EndLoc = Self.PP.getLocForEndOfToken(RHSExpr->getLocEnd());
Self.Diag(OpLoc, diag::note_string_plus_int_silence)
<< FixItHint::CreateInsertion(LHSExpr->getLocStart(), "&")
<< FixItHint::CreateReplacement(SourceRange(OpLoc), "[")
<< FixItHint::CreateInsertion(EndLoc, "]");
} else
Self.Diag(OpLoc, diag::note_string_plus_int_silence);
}
static void diagnosePointerIncompatibility(Sema &S, SourceLocation Loc,
Expr *LHSExpr, Expr *RHSExpr) {
assert(LHSExpr->getType()->isAnyPointerType());
assert(RHSExpr->getType()->isAnyPointerType());
S.Diag(Loc, diag::err_typecheck_sub_ptr_compatible)
<< LHSExpr->getType() << RHSExpr->getType() << LHSExpr->getSourceRange()
<< RHSExpr->getSourceRange();
}
QualType Sema::CheckAdditionOperands( ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
QualType* CompLHSTy) {
checkArithmeticNull(*this, LHS, RHS, Loc, false);
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType()) {
QualType compType = CheckVectorOperands(LHS, RHS, Loc, CompLHSTy);
if (CompLHSTy) *CompLHSTy = compType;
return compType;
}
QualType compType = UsualArithmeticConversions(LHS, RHS, CompLHSTy);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
if (Opc == BO_Add)
diagnoseStringPlusInt(*this, Loc, LHS.get(), RHS.get());
if (!compType.isNull() && compType->isArithmeticType()) {
if (CompLHSTy) *CompLHSTy = compType;
return compType;
}
Expr *PExp = LHS.get(), *IExp = RHS.get();
bool isObjCPointer;
if (PExp->getType()->isPointerType()) {
isObjCPointer = false;
} else if (PExp->getType()->isObjCObjectPointerType()) {
isObjCPointer = true;
} else {
std::swap(PExp, IExp);
if (PExp->getType()->isPointerType()) {
isObjCPointer = false;
} else if (PExp->getType()->isObjCObjectPointerType()) {
isObjCPointer = true;
} else {
return InvalidOperands(Loc, LHS, RHS);
}
}
assert(PExp->getType()->isAnyPointerType());
if (!IExp->getType()->isIntegerType())
return InvalidOperands(Loc, LHS, RHS);
if (!checkArithmeticOpPointerOperand(*this, Loc, PExp))
return QualType();
if (isObjCPointer && checkArithmeticOnObjCPointer(*this, Loc, PExp))
return QualType();
CheckArrayAccess(PExp, IExp);
if (CompLHSTy) {
QualType LHSTy = Context.isPromotableBitField(LHS.get());
if (LHSTy.isNull()) {
LHSTy = LHS.get()->getType();
if (LHSTy->isPromotableIntegerType())
LHSTy = Context.getPromotedIntegerType(LHSTy);
}
*CompLHSTy = LHSTy;
}
return PExp->getType();
}
QualType Sema::CheckSubtractionOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc,
QualType* CompLHSTy) {
checkArithmeticNull(*this, LHS, RHS, Loc, false);
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType()) {
QualType compType = CheckVectorOperands(LHS, RHS, Loc, CompLHSTy);
if (CompLHSTy) *CompLHSTy = compType;
return compType;
}
QualType compType = UsualArithmeticConversions(LHS, RHS, CompLHSTy);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
if (!compType.isNull() && compType->isArithmeticType()) {
if (CompLHSTy) *CompLHSTy = compType;
return compType;
}
if (LHS.get()->getType()->isAnyPointerType()) {
QualType lpointee = LHS.get()->getType()->getPointeeType();
if (LHS.get()->getType()->isObjCObjectPointerType() &&
checkArithmeticOnObjCPointer(*this, Loc, LHS.get()))
return QualType();
if (RHS.get()->getType()->isIntegerType()) {
if (!checkArithmeticOpPointerOperand(*this, Loc, LHS.get()))
return QualType();
CheckArrayAccess(LHS.get(), RHS.get(), 0,
true, true);
if (CompLHSTy) *CompLHSTy = LHS.get()->getType();
return LHS.get()->getType();
}
if (const PointerType *RHSPTy
= RHS.get()->getType()->getAs<PointerType>()) {
QualType rpointee = RHSPTy->getPointeeType();
if (getLangOpts().CPlusPlus) {
if (!Context.hasSameUnqualifiedType(lpointee, rpointee)) {
diagnosePointerIncompatibility(*this, Loc, LHS.get(), RHS.get());
}
} else {
if (!Context.typesAreCompatible(
Context.getCanonicalType(lpointee).getUnqualifiedType(),
Context.getCanonicalType(rpointee).getUnqualifiedType())) {
diagnosePointerIncompatibility(*this, Loc, LHS.get(), RHS.get());
return QualType();
}
}
if (!checkArithmeticBinOpPointerOperands(*this, Loc,
LHS.get(), RHS.get()))
return QualType();
if (CompLHSTy) *CompLHSTy = LHS.get()->getType();
return Context.getPointerDiffType();
}
}
return InvalidOperands(Loc, LHS, RHS);
}
static bool isScopedEnumerationType(QualType T) {
if (const EnumType *ET = dyn_cast<EnumType>(T))
return ET->getDecl()->isScoped();
return false;
}
static void DiagnoseBadShiftValues(Sema& S, ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc, unsigned Opc,
QualType LHSType) {
llvm::APSInt Right;
if (RHS.get()->isValueDependent() ||
!RHS.get()->isIntegerConstantExpr(Right, S.Context))
return;
if (Right.isNegative()) {
S.DiagRuntimeBehavior(Loc, RHS.get(),
S.PDiag(diag::warn_shift_negative)
<< RHS.get()->getSourceRange());
return;
}
llvm::APInt LeftBits(Right.getBitWidth(),
S.Context.getTypeSize(LHS.get()->getType()));
if (Right.uge(LeftBits)) {
S.DiagRuntimeBehavior(Loc, RHS.get(),
S.PDiag(diag::warn_shift_gt_typewidth)
<< RHS.get()->getSourceRange());
return;
}
if (Opc != BO_Shl)
return;
llvm::APSInt Left;
if (LHS.get()->isValueDependent() ||
!LHS.get()->isIntegerConstantExpr(Left, S.Context) ||
LHSType->hasUnsignedIntegerRepresentation())
return;
llvm::APInt ResultBits =
static_cast<llvm::APInt&>(Right) + Left.getMinSignedBits();
if (LeftBits.uge(ResultBits))
return;
llvm::APSInt Result = Left.extend(ResultBits.getLimitedValue());
Result = Result.shl(Right);
SmallString<40> HexResult;
Result.toString(HexResult, 16, false, true);
if (LeftBits == ResultBits - 1) {
S.Diag(Loc, diag::warn_shift_result_sets_sign_bit)
<< HexResult.str() << LHSType
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
return;
}
S.Diag(Loc, diag::warn_shift_result_gt_typewidth)
<< HexResult.str() << Result.getMinSignedBits() << LHSType
<< Left.getBitWidth() << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
}
QualType Sema::CheckShiftOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc, unsigned Opc,
bool IsCompAssign) {
checkArithmeticNull(*this, LHS, RHS, Loc, false);
if (!LHS.get()->getType()->hasIntegerRepresentation() ||
!RHS.get()->getType()->hasIntegerRepresentation())
return InvalidOperands(Loc, LHS, RHS);
if (isScopedEnumerationType(LHS.get()->getType()) ||
isScopedEnumerationType(RHS.get()->getType())) {
return InvalidOperands(Loc, LHS, RHS);
}
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType())
return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign);
ExprResult OldLHS = LHS;
LHS = UsualUnaryConversions(LHS.take());
if (LHS.isInvalid())
return QualType();
QualType LHSType = LHS.get()->getType();
if (IsCompAssign) LHS = OldLHS;
RHS = UsualUnaryConversions(RHS.take());
if (RHS.isInvalid())
return QualType();
DiagnoseBadShiftValues(*this, LHS, RHS, Loc, Opc, LHSType);
return LHSType;
}
static bool IsWithinTemplateSpecialization(Decl *D) {
if (DeclContext *DC = D->getDeclContext()) {
if (isa<ClassTemplateSpecializationDecl>(DC))
return true;
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DC))
return FD->isFunctionTemplateSpecialization();
}
return false;
}
static void checkEnumComparison(Sema &S, SourceLocation Loc, ExprResult &LHS,
ExprResult &RHS) {
QualType LHSStrippedType = LHS.get()->IgnoreParenImpCasts()->getType();
QualType RHSStrippedType = RHS.get()->IgnoreParenImpCasts()->getType();
const EnumType *LHSEnumType = LHSStrippedType->getAs<EnumType>();
if (!LHSEnumType)
return;
const EnumType *RHSEnumType = RHSStrippedType->getAs<EnumType>();
if (!RHSEnumType)
return;
if (!LHSEnumType->getDecl()->getIdentifier())
return;
if (!RHSEnumType->getDecl()->getIdentifier())
return;
if (S.Context.hasSameUnqualifiedType(LHSStrippedType, RHSStrippedType))
return;
S.Diag(Loc, diag::warn_comparison_of_mixed_enum_types)
<< LHSStrippedType << RHSStrippedType
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
}
static void diagnoseDistinctPointerComparison(Sema &S, SourceLocation Loc,
ExprResult &LHS, ExprResult &RHS,
bool IsError) {
S.Diag(Loc, IsError ? diag::err_typecheck_comparison_of_distinct_pointers
: diag::ext_typecheck_comparison_of_distinct_pointers)
<< LHS.get()->getType() << RHS.get()->getType()
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
}
static bool convertPointersToCompositeType(Sema &S, SourceLocation Loc,
ExprResult &LHS, ExprResult &RHS) {
QualType LHSType = LHS.get()->getType();
QualType RHSType = RHS.get()->getType();
assert((LHSType->isPointerType() && RHSType->isPointerType()) ||
(LHSType->isMemberPointerType() && RHSType->isMemberPointerType()));
bool NonStandardCompositeType = false;
bool *BoolPtr = S.isSFINAEContext() ? 0 : &NonStandardCompositeType;
QualType T = S.FindCompositePointerType(Loc, LHS, RHS, BoolPtr);
if (T.isNull()) {
diagnoseDistinctPointerComparison(S, Loc, LHS, RHS, true);
return true;
}
if (NonStandardCompositeType)
S.Diag(Loc, diag::ext_typecheck_comparison_of_distinct_pointers_nonstandard)
<< LHSType << RHSType << T << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
LHS = S.ImpCastExprToType(LHS.take(), T, CK_BitCast);
RHS = S.ImpCastExprToType(RHS.take(), T, CK_BitCast);
return false;
}
static void diagnoseFunctionPointerToVoidComparison(Sema &S, SourceLocation Loc,
ExprResult &LHS,
ExprResult &RHS,
bool IsError) {
S.Diag(Loc, IsError ? diag::err_typecheck_comparison_of_fptr_to_void
: diag::ext_typecheck_comparison_of_fptr_to_void)
<< LHS.get()->getType() << RHS.get()->getType()
<< LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
}
static bool isObjCObjectLiteral(ExprResult &E) {
switch (E.get()->IgnoreParenImpCasts()->getStmtClass()) {
case Stmt::ObjCArrayLiteralClass:
case Stmt::ObjCDictionaryLiteralClass:
case Stmt::ObjCStringLiteralClass:
case Stmt::ObjCBoxedExprClass:
return true;
default:
return false;
}
}
static bool hasIsEqualMethod(Sema &S, const Expr *LHS, const Expr *RHS) {
QualType Type = LHS->getType();
QualType InterfaceType;
if (const ObjCObjectPointerType *PTy = Type->getAs<ObjCObjectPointerType>()) {
InterfaceType = PTy->getPointeeType();
if (const ObjCObjectType *iQFaceTy =
InterfaceType->getAsObjCQualifiedInterfaceType())
InterfaceType = iQFaceTy->getBaseType();
} else {
return false;
}
if (!RHS->getType()->isObjCObjectPointerType())
return false;
Selector IsEqualSel = S.NSAPIObj->getIsEqualSelector();
ObjCMethodDecl *Method = S.LookupMethodInObjectType(IsEqualSel,
InterfaceType,
true);
if (!Method) {
if (Type->isObjCIdType()) {
Method = S.LookupInstanceMethodInGlobalPool(IsEqualSel, SourceRange(),
true,
false);
} else {
Method = S.LookupMethodInQualifiedType(IsEqualSel,
cast<ObjCObjectPointerType>(Type),
true);
}
}
if (!Method)
return false;
QualType T = Method->param_begin()[0]->getType();
if (!T->isObjCObjectPointerType())
return false;
QualType R = Method->getResultType();
if (!R->isScalarType())
return false;
return true;
}
static void diagnoseObjCLiteralComparison(Sema &S, SourceLocation Loc,
ExprResult &LHS, ExprResult &RHS,
BinaryOperator::Opcode Opc){
Expr *Literal;
Expr *Other;
if (isObjCObjectLiteral(LHS)) {
Literal = LHS.get();
Other = RHS.get();
} else {
Literal = RHS.get();
Other = LHS.get();
}
Other = Other->IgnoreParenCasts();
if (Other->isNullPointerConstant(S.getASTContext(),
Expr::NPC_ValueDependentIsNotNull))
return;
enum {
LK_Array,
LK_Dictionary,
LK_Numeric,
LK_Boxed,
LK_String
} LiteralKind;
Literal = Literal->IgnoreParenImpCasts();
switch (Literal->getStmtClass()) {
case Stmt::ObjCStringLiteralClass:
LiteralKind = LK_String;
break;
case Stmt::ObjCArrayLiteralClass:
LiteralKind = LK_Array;
break;
case Stmt::ObjCDictionaryLiteralClass:
LiteralKind = LK_Dictionary;
break;
case Stmt::ObjCBoxedExprClass: {
Expr *Inner = cast<ObjCBoxedExpr>(Literal)->getSubExpr();
switch (Inner->getStmtClass()) {
case Stmt::IntegerLiteralClass:
case Stmt::FloatingLiteralClass:
case Stmt::CharacterLiteralClass:
case Stmt::ObjCBoolLiteralExprClass:
case Stmt::CXXBoolLiteralExprClass:
LiteralKind = LK_Numeric;
break;
case Stmt::ImplicitCastExprClass: {
CastKind CK = cast<CastExpr>(Inner)->getCastKind();
if (CK == CK_IntegralToBoolean || CK == CK_IntegralCast) {
LiteralKind = LK_Numeric;
break;
}
}
default:
LiteralKind = LK_Boxed;
break;
}
break;
}
default:
llvm_unreachable("Unknown Objective-C object literal kind");
}
if (LiteralKind == LK_String)
S.Diag(Loc, diag::warn_objc_string_literal_comparison)
<< Literal->getSourceRange();
else
S.Diag(Loc, diag::warn_objc_literal_comparison)
<< LiteralKind << Literal->getSourceRange();
if (BinaryOperator::isEqualityOp(Opc) &&
hasIsEqualMethod(S, LHS.get(), RHS.get())) {
SourceLocation Start = LHS.get()->getLocStart();
SourceLocation End = S.PP.getLocForEndOfToken(RHS.get()->getLocEnd());
SourceRange OpRange(Loc, S.PP.getLocForEndOfToken(Loc));
S.Diag(Loc, diag::note_objc_literal_comparison_isequal)
<< FixItHint::CreateInsertion(Start, Opc == BO_EQ ? "[" : "![")
<< FixItHint::CreateReplacement(OpRange, "isEqual:")
<< FixItHint::CreateInsertion(End, "]");
}
}
QualType Sema::CheckCompareOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc, unsigned OpaqueOpc,
bool IsRelational) {
checkArithmeticNull(*this, LHS, RHS, Loc, true);
BinaryOperatorKind Opc = (BinaryOperatorKind) OpaqueOpc;
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType())
return CheckVectorCompareOperands(LHS, RHS, Loc, IsRelational);
QualType LHSType = LHS.get()->getType();
QualType RHSType = RHS.get()->getType();
Expr *LHSStripped = LHS.get()->IgnoreParenImpCasts();
Expr *RHSStripped = RHS.get()->IgnoreParenImpCasts();
checkEnumComparison(*this, Loc, LHS, RHS);
if (!LHSType->hasFloatingRepresentation() &&
!(LHSType->isBlockPointerType() && IsRelational) &&
!LHS.get()->getLocStart().isMacroID() &&
!RHS.get()->getLocStart().isMacroID()) {
if (DeclRefExpr* DRL = dyn_cast<DeclRefExpr>(LHSStripped)) {
if (DeclRefExpr* DRR = dyn_cast<DeclRefExpr>(RHSStripped)) {
if (DRL->getDecl() == DRR->getDecl() &&
!IsWithinTemplateSpecialization(DRL->getDecl())) {
DiagRuntimeBehavior(Loc, 0, PDiag(diag::warn_comparison_always)
<< 0 << (Opc == BO_EQ
|| Opc == BO_LE
|| Opc == BO_GE));
} else if (LHSType->isArrayType() && RHSType->isArrayType() &&
!DRL->getDecl()->getType()->isReferenceType() &&
!DRR->getDecl()->getType()->isReferenceType()) {
char always_evals_to;
switch(Opc) {
case BO_EQ: always_evals_to = 0; break;
case BO_NE: always_evals_to = 1; break;
default:
always_evals_to = 2; break;
}
DiagRuntimeBehavior(Loc, 0, PDiag(diag::warn_comparison_always)
<< 1 << always_evals_to);
}
}
}
if (isa<CastExpr>(LHSStripped))
LHSStripped = LHSStripped->IgnoreParenCasts();
if (isa<CastExpr>(RHSStripped))
RHSStripped = RHSStripped->IgnoreParenCasts();
Expr *literalString = 0;
Expr *literalStringStripped = 0;
if ((isa<StringLiteral>(LHSStripped) || isa<ObjCEncodeExpr>(LHSStripped)) &&
!RHSStripped->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull)) {
literalString = LHS.get();
literalStringStripped = LHSStripped;
} else if ((isa<StringLiteral>(RHSStripped) ||
isa<ObjCEncodeExpr>(RHSStripped)) &&
!LHSStripped->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull)) {
literalString = RHS.get();
literalStringStripped = RHSStripped;
}
if (literalString) {
std::string resultComparison;
switch (Opc) {
case BO_LT: resultComparison = ") < 0"; break;
case BO_GT: resultComparison = ") > 0"; break;
case BO_LE: resultComparison = ") <= 0"; break;
case BO_GE: resultComparison = ") >= 0"; break;
case BO_EQ: resultComparison = ") == 0"; break;
case BO_NE: resultComparison = ") != 0"; break;
default: llvm_unreachable("Invalid comparison operator");
}
DiagRuntimeBehavior(Loc, 0,
PDiag(diag::warn_stringcompare)
<< isa<ObjCEncodeExpr>(literalStringStripped)
<< literalString->getSourceRange());
}
}
if (LHS.get()->getType()->isArithmeticType() &&
RHS.get()->getType()->isArithmeticType()) {
UsualArithmeticConversions(LHS, RHS);
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
}
else {
LHS = UsualUnaryConversions(LHS.take());
if (LHS.isInvalid())
return QualType();
RHS = UsualUnaryConversions(RHS.take());
if (RHS.isInvalid())
return QualType();
}
LHSType = LHS.get()->getType();
RHSType = RHS.get()->getType();
QualType ResultTy = Context.getLogicalOperationType();
if (IsRelational) {
if (LHSType->isRealType() && RHSType->isRealType())
return ResultTy;
} else {
if (LHSType->hasFloatingRepresentation())
CheckFloatComparison(Loc, LHS.get(), RHS.get());
if (LHSType->isArithmeticType() && RHSType->isArithmeticType())
return ResultTy;
}
bool LHSIsNull = LHS.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull);
bool RHSIsNull = RHS.get()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNull);
if (LHSType->isPointerType() && RHSType->isPointerType()) { QualType LCanPointeeTy =
LHSType->castAs<PointerType>()->getPointeeType().getCanonicalType();
QualType RCanPointeeTy =
RHSType->castAs<PointerType>()->getPointeeType().getCanonicalType();
if (getLangOpts().CPlusPlus) {
if (LCanPointeeTy == RCanPointeeTy)
return ResultTy;
if (!IsRelational &&
(LCanPointeeTy->isVoidType() || RCanPointeeTy->isVoidType())) {
if ((LCanPointeeTy->isFunctionType() || RCanPointeeTy->isFunctionType())
&& !LHSIsNull && !RHSIsNull) {
diagnoseFunctionPointerToVoidComparison(
*this, Loc, LHS, RHS, isSFINAEContext());
if (isSFINAEContext())
return QualType();
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_BitCast);
return ResultTy;
}
}
if (convertPointersToCompositeType(*this, Loc, LHS, RHS))
return QualType();
else
return ResultTy;
}
if (Context.typesAreCompatible(LCanPointeeTy.getUnqualifiedType(),
RCanPointeeTy.getUnqualifiedType())) {
if (IsRelational && LCanPointeeTy->isFunctionType()) {
Diag(Loc, diag::ext_typecheck_ordered_comparison_of_function_pointers)
<< LHSType << RHSType << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
}
} else if (!IsRelational &&
(LCanPointeeTy->isVoidType() || RCanPointeeTy->isVoidType())) {
if ((LCanPointeeTy->isFunctionType() || RCanPointeeTy->isFunctionType())
&& !LHSIsNull && !RHSIsNull)
diagnoseFunctionPointerToVoidComparison(*this, Loc, LHS, RHS,
false);
} else {
diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, false);
}
if (LCanPointeeTy != RCanPointeeTy) {
if (LHSIsNull && !RHSIsNull)
LHS = ImpCastExprToType(LHS.take(), RHSType, CK_BitCast);
else
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_BitCast);
}
return ResultTy;
}
if (getLangOpts().CPlusPlus) {
if (LHSType->isNullPtrType() && RHSType->isNullPtrType())
return ResultTy;
if (RHSIsNull &&
((LHSType->isAnyPointerType() || LHSType->isNullPtrType()) ||
(!IsRelational &&
(LHSType->isMemberPointerType() || LHSType->isBlockPointerType())))) {
RHS = ImpCastExprToType(RHS.take(), LHSType,
LHSType->isMemberPointerType()
? CK_NullToMemberPointer
: CK_NullToPointer);
return ResultTy;
}
if (LHSIsNull &&
((RHSType->isAnyPointerType() || RHSType->isNullPtrType()) ||
(!IsRelational &&
(RHSType->isMemberPointerType() || RHSType->isBlockPointerType())))) {
LHS = ImpCastExprToType(LHS.take(), RHSType,
RHSType->isMemberPointerType()
? CK_NullToMemberPointer
: CK_NullToPointer);
return ResultTy;
}
if (!IsRelational &&
LHSType->isMemberPointerType() && RHSType->isMemberPointerType()) {
if (convertPointersToCompositeType(*this, Loc, LHS, RHS))
return QualType();
else
return ResultTy;
}
if (LHS.get()->getType()->isEnumeralType() &&
Context.hasSameUnqualifiedType(LHS.get()->getType(),
RHS.get()->getType()))
return ResultTy;
}
if (!IsRelational && LHSType->isBlockPointerType() &&
RHSType->isBlockPointerType()) {
QualType lpointee = LHSType->castAs<BlockPointerType>()->getPointeeType();
QualType rpointee = RHSType->castAs<BlockPointerType>()->getPointeeType();
if (!LHSIsNull && !RHSIsNull &&
!Context.typesAreCompatible(lpointee, rpointee)) {
Diag(Loc, diag::err_typecheck_comparison_of_distinct_blocks)
<< LHSType << RHSType << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
}
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_BitCast);
return ResultTy;
}
if (!IsRelational
&& ((LHSType->isBlockPointerType() && RHSType->isPointerType())
|| (LHSType->isPointerType() && RHSType->isBlockPointerType()))) {
if (!LHSIsNull && !RHSIsNull) {
if (!((RHSType->isPointerType() && RHSType->castAs<PointerType>()
->getPointeeType()->isVoidType())
|| (LHSType->isPointerType() && LHSType->castAs<PointerType>()
->getPointeeType()->isVoidType())))
Diag(Loc, diag::err_typecheck_comparison_of_distinct_blocks)
<< LHSType << RHSType << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
}
if (LHSIsNull && !RHSIsNull)
LHS = ImpCastExprToType(LHS.take(), RHSType,
RHSType->isPointerType() ? CK_BitCast
: CK_AnyPointerToBlockPointerCast);
else
RHS = ImpCastExprToType(RHS.take(), LHSType,
LHSType->isPointerType() ? CK_BitCast
: CK_AnyPointerToBlockPointerCast);
return ResultTy;
}
if (LHSType->isObjCObjectPointerType() ||
RHSType->isObjCObjectPointerType()) {
const PointerType *LPT = LHSType->getAs<PointerType>();
const PointerType *RPT = RHSType->getAs<PointerType>();
if (LPT || RPT) {
bool LPtrToVoid = LPT ? LPT->getPointeeType()->isVoidType() : false;
bool RPtrToVoid = RPT ? RPT->getPointeeType()->isVoidType() : false;
if (!LPtrToVoid && !RPtrToVoid &&
!Context.typesAreCompatible(LHSType, RHSType)) {
diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS,
false);
}
if (LHSIsNull && !RHSIsNull)
LHS = ImpCastExprToType(LHS.take(), RHSType,
RPT ? CK_BitCast :CK_CPointerToObjCPointerCast);
else
RHS = ImpCastExprToType(RHS.take(), LHSType,
LPT ? CK_BitCast :CK_CPointerToObjCPointerCast);
return ResultTy;
}
if (LHSType->isObjCObjectPointerType() &&
RHSType->isObjCObjectPointerType()) {
if (!Context.areComparableObjCPointerTypes(LHSType, RHSType))
diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS,
false);
if (isObjCObjectLiteral(LHS) || isObjCObjectLiteral(RHS))
diagnoseObjCLiteralComparison(*this, Loc, LHS, RHS, Opc);
if (LHSIsNull && !RHSIsNull)
LHS = ImpCastExprToType(LHS.take(), RHSType, CK_BitCast);
else
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_BitCast);
return ResultTy;
}
}
if ((LHSType->isAnyPointerType() && RHSType->isIntegerType()) ||
(LHSType->isIntegerType() && RHSType->isAnyPointerType())) {
unsigned DiagID = 0;
bool isError = false;
if (LangOpts.DebuggerSupport) {
} else if ((LHSIsNull && LHSType->isIntegerType()) ||
(RHSIsNull && RHSType->isIntegerType())) {
if (IsRelational && !getLangOpts().CPlusPlus)
DiagID = diag::ext_typecheck_ordered_comparison_of_pointer_and_zero;
} else if (IsRelational && !getLangOpts().CPlusPlus)
DiagID = diag::ext_typecheck_ordered_comparison_of_pointer_integer;
else if (getLangOpts().CPlusPlus) {
DiagID = diag::err_typecheck_comparison_of_pointer_integer;
isError = true;
} else
DiagID = diag::ext_typecheck_comparison_of_pointer_integer;
if (DiagID) {
Diag(Loc, DiagID)
<< LHSType << RHSType << LHS.get()->getSourceRange()
<< RHS.get()->getSourceRange();
if (isError)
return QualType();
}
if (LHSType->isIntegerType())
LHS = ImpCastExprToType(LHS.take(), RHSType,
LHSIsNull ? CK_NullToPointer : CK_IntegralToPointer);
else
RHS = ImpCastExprToType(RHS.take(), LHSType,
RHSIsNull ? CK_NullToPointer : CK_IntegralToPointer);
return ResultTy;
}
if (!IsRelational && RHSIsNull
&& LHSType->isBlockPointerType() && RHSType->isIntegerType()) {
RHS = ImpCastExprToType(RHS.take(), LHSType, CK_NullToPointer);
return ResultTy;
}
if (!IsRelational && LHSIsNull
&& LHSType->isIntegerType() && RHSType->isBlockPointerType()) {
LHS = ImpCastExprToType(LHS.take(), RHSType, CK_NullToPointer);
return ResultTy;
}
return InvalidOperands(Loc, LHS, RHS);
}
QualType Sema::GetSignedVectorType(QualType V) {
const VectorType *VTy = V->getAs<VectorType>();
unsigned TypeSize = Context.getTypeSize(VTy->getElementType());
if (TypeSize == Context.getTypeSize(Context.CharTy))
return Context.getExtVectorType(Context.CharTy, VTy->getNumElements());
else if (TypeSize == Context.getTypeSize(Context.ShortTy))
return Context.getExtVectorType(Context.ShortTy, VTy->getNumElements());
else if (TypeSize == Context.getTypeSize(Context.IntTy))
return Context.getExtVectorType(Context.IntTy, VTy->getNumElements());
else if (TypeSize == Context.getTypeSize(Context.LongTy))
return Context.getExtVectorType(Context.LongTy, VTy->getNumElements());
assert(TypeSize == Context.getTypeSize(Context.LongLongTy) &&
"Unhandled vector element size in vector compare");
return Context.getExtVectorType(Context.LongLongTy, VTy->getNumElements());
}
QualType Sema::CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc,
bool IsRelational) {
QualType vType = CheckVectorOperands(LHS, RHS, Loc, false);
if (vType.isNull())
return vType;
QualType LHSType = LHS.get()->getType();
if (vType->getAs<VectorType>()->getVectorKind() == VectorType::AltiVecVector)
return Context.getLogicalOperationType();
if (!LHSType->hasFloatingRepresentation()) {
if (DeclRefExpr* DRL
= dyn_cast<DeclRefExpr>(LHS.get()->IgnoreParenImpCasts()))
if (DeclRefExpr* DRR
= dyn_cast<DeclRefExpr>(RHS.get()->IgnoreParenImpCasts()))
if (DRL->getDecl() == DRR->getDecl())
DiagRuntimeBehavior(Loc, 0,
PDiag(diag::warn_comparison_always)
<< 0 << 2 );
}
if (!IsRelational && LHSType->hasFloatingRepresentation()) {
assert (RHS.get()->getType()->hasFloatingRepresentation());
CheckFloatComparison(Loc, LHS.get(), RHS.get());
}
return GetSignedVectorType(LHSType);
}
QualType Sema::CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc) {
QualType vType = CheckVectorOperands(LHS, RHS, Loc, false);
if (vType.isNull() || vType->isFloatingType())
return InvalidOperands(Loc, LHS, RHS);
return GetSignedVectorType(LHS.get()->getType());
}
inline QualType Sema::CheckBitwiseOperands(
ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign) {
checkArithmeticNull(*this, LHS, RHS, Loc, false);
if (LHS.get()->getType()->isVectorType() ||
RHS.get()->getType()->isVectorType()) {
if (LHS.get()->getType()->hasIntegerRepresentation() &&
RHS.get()->getType()->hasIntegerRepresentation())
return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign);
return InvalidOperands(Loc, LHS, RHS);
}
ExprResult LHSResult = Owned(LHS), RHSResult = Owned(RHS);
QualType compType = UsualArithmeticConversions(LHSResult, RHSResult,
IsCompAssign);
if (LHSResult.isInvalid() || RHSResult.isInvalid())
return QualType();
LHS = LHSResult.take();
RHS = RHSResult.take();
if (!compType.isNull() && compType->isIntegralOrUnscopedEnumerationType())
return compType;
return InvalidOperands(Loc, LHS, RHS);
}
inline QualType Sema::CheckLogicalOperands( ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc) {
if (LHS.get()->getType()->isVectorType() || RHS.get()->getType()->isVectorType())
return CheckVectorLogicalOperands(LHS, RHS, Loc);
if (LHS.get()->getType()->isIntegerType() &&
!LHS.get()->getType()->isBooleanType() &&
RHS.get()->getType()->isIntegerType() && !RHS.get()->isValueDependent() &&
!Loc.isMacroID() && ActiveTemplateInstantiations.empty()) {
llvm::APSInt Result;
if (RHS.get()->EvaluateAsInt(Result, Context))
if ((getLangOpts().Bool && !RHS.get()->getType()->isBooleanType()) ||
(Result != 0 && Result != 1)) {
Diag(Loc, diag::warn_logical_instead_of_bitwise)
<< RHS.get()->getSourceRange()
<< (Opc == BO_LAnd ? "&&" : "||");
Diag(Loc, diag::note_logical_instead_of_bitwise_change_operator)
<< (Opc == BO_LAnd ? "&" : "|")
<< FixItHint::CreateReplacement(SourceRange(
Loc, Lexer::getLocForEndOfToken(Loc, 0, getSourceManager(),
getLangOpts())),
Opc == BO_LAnd ? "&" : "|");
if (Opc == BO_LAnd)
Diag(Loc, diag::note_logical_instead_of_bitwise_remove_constant)
<< FixItHint::CreateRemoval(
SourceRange(
Lexer::getLocForEndOfToken(LHS.get()->getLocEnd(),
0, getSourceManager(),
getLangOpts()),
RHS.get()->getLocEnd()));
}
}
if (!Context.getLangOpts().CPlusPlus) {
LHS = UsualUnaryConversions(LHS.take());
if (LHS.isInvalid())
return QualType();
RHS = UsualUnaryConversions(RHS.take());
if (RHS.isInvalid())
return QualType();
if (!LHS.get()->getType()->isScalarType() ||
!RHS.get()->getType()->isScalarType())
return InvalidOperands(Loc, LHS, RHS);
return Context.IntTy;
}
ExprResult LHSRes = PerformContextuallyConvertToBool(LHS.get());
if (LHSRes.isInvalid())
return InvalidOperands(Loc, LHS, RHS);
LHS = LHSRes;
ExprResult RHSRes = PerformContextuallyConvertToBool(RHS.get());
if (RHSRes.isInvalid())
return InvalidOperands(Loc, LHS, RHS);
RHS = RHSRes;
return Context.BoolTy;
}
static bool IsReadonlyProperty(Expr *E, Sema &S) {
const ObjCPropertyRefExpr *PropExpr = dyn_cast<ObjCPropertyRefExpr>(E);
if (!PropExpr) return false;
if (PropExpr->isImplicitProperty()) return false;
ObjCPropertyDecl *PDecl = PropExpr->getExplicitProperty();
QualType BaseType = PropExpr->isSuperReceiver() ?
PropExpr->getSuperReceiverType() :
PropExpr->getBase()->getType();
if (const ObjCObjectPointerType *OPT =
BaseType->getAsObjCInterfacePointerType())
if (ObjCInterfaceDecl *IFace = OPT->getInterfaceDecl())
if (S.isPropertyReadonly(PDecl, IFace))
return true;
return false;
}
static bool IsReadonlyMessage(Expr *E, Sema &S) {
const MemberExpr *ME = dyn_cast<MemberExpr>(E);
if (!ME) return false;
if (!isa<FieldDecl>(ME->getMemberDecl())) return false;
ObjCMessageExpr *Base =
dyn_cast<ObjCMessageExpr>(ME->getBase()->IgnoreParenImpCasts());
if (!Base) return false;
return Base->getMethodDecl() != 0;
}
enum NonConstCaptureKind { NCCK_None, NCCK_Block, NCCK_Lambda };
static NonConstCaptureKind isReferenceToNonConstCapture(Sema &S, Expr *E) {
assert(E->isLValue() && E->getType().isConstQualified());
E = E->IgnoreParens();
DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
if (!DRE) return NCCK_None;
if (!DRE->refersToEnclosingLocal()) return NCCK_None;
VarDecl *var = dyn_cast<VarDecl>(DRE->getDecl());
if (!var) return NCCK_None;
if (var->getType().isConstQualified()) return NCCK_None;
assert(var->hasLocalStorage() && "capture added 'const' to non-local?");
DeclContext *DC = S.CurContext;
while (DC->getParent() != var->getDeclContext())
DC = DC->getParent();
return (isa<BlockDecl>(DC) ? NCCK_Block : NCCK_Lambda);
}
static bool CheckForModifiableLvalue(Expr *E, SourceLocation Loc, Sema &S) {
assert(!E->hasPlaceholderType(BuiltinType::PseudoObject));
SourceLocation OrigLoc = Loc;
Expr::isModifiableLvalueResult IsLV = E->isModifiableLvalue(S.Context,
&Loc);
if (IsLV == Expr::MLV_Valid && IsReadonlyProperty(E, S))
IsLV = Expr::MLV_ReadonlyProperty;
else if (IsLV == Expr::MLV_ClassTemporary && IsReadonlyMessage(E, S))
IsLV = Expr::MLV_InvalidMessageExpression;
if (IsLV == Expr::MLV_Valid)
return false;
unsigned Diag = 0;
bool NeedType = false;
switch (IsLV) { case Expr::MLV_ConstQualified:
Diag = diag::err_typecheck_assign_const;
if (NonConstCaptureKind NCCK = isReferenceToNonConstCapture(S, E)) {
if (NCCK == NCCK_Block)
Diag = diag::err_block_decl_ref_not_modifiable_lvalue;
else
Diag = diag::err_lambda_decl_ref_not_modifiable_lvalue;
break;
}
if (S.getLangOpts().ObjCAutoRefCount) {
DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts());
if (declRef && isa<VarDecl>(declRef->getDecl())) {
VarDecl *var = cast<VarDecl>(declRef->getDecl());
if (var->isARCPseudoStrong() &&
(!var->getTypeSourceInfo() ||
!var->getTypeSourceInfo()->getType().isConstQualified())) {
ObjCMethodDecl *method = S.getCurMethodDecl();
if (method && var == method->getSelfDecl())
Diag = method->isClassMethod()
? diag::err_typecheck_arc_assign_self_class_method
: diag::err_typecheck_arc_assign_self;
else
Diag = diag::err_typecheck_arr_assign_enumeration;
SourceRange Assign;
if (Loc != OrigLoc)
Assign = SourceRange(OrigLoc, OrigLoc);
S.Diag(Loc, Diag) << E->getSourceRange() << Assign;
return false;
}
}
}
break;
case Expr::MLV_ArrayType:
case Expr::MLV_ArrayTemporary:
Diag = diag::err_typecheck_array_not_modifiable_lvalue;
NeedType = true;
break;
case Expr::MLV_NotObjectType:
Diag = diag::err_typecheck_non_object_not_modifiable_lvalue;
NeedType = true;
break;
case Expr::MLV_LValueCast:
Diag = diag::err_typecheck_lvalue_casts_not_supported;
break;
case Expr::MLV_Valid:
llvm_unreachable("did not take early return for MLV_Valid");
case Expr::MLV_InvalidExpression:
case Expr::MLV_MemberFunction:
case Expr::MLV_ClassTemporary:
Diag = diag::err_typecheck_expression_not_modifiable_lvalue;
break;
case Expr::MLV_IncompleteType:
case Expr::MLV_IncompleteVoidType:
return S.RequireCompleteType(Loc, E->getType(),
diag::err_typecheck_incomplete_type_not_modifiable_lvalue, E);
case Expr::MLV_DuplicateVectorComponents:
Diag = diag::err_typecheck_duplicate_vector_components_not_mlvalue;
break;
case Expr::MLV_ReadonlyProperty:
case Expr::MLV_NoSetterProperty:
llvm_unreachable("readonly properties should be processed differently");
case Expr::MLV_InvalidMessageExpression:
Diag = diag::error_readonly_message_assignment;
break;
case Expr::MLV_SubObjCPropertySetting:
Diag = diag::error_no_subobject_property_setting;
break;
}
SourceRange Assign;
if (Loc != OrigLoc)
Assign = SourceRange(OrigLoc, OrigLoc);
if (NeedType)
S.Diag(Loc, Diag) << E->getType() << E->getSourceRange() << Assign;
else
S.Diag(Loc, Diag) << E->getSourceRange() << Assign;
return true;
}
static void CheckIdentityFieldAssignment(Expr *LHSExpr, Expr *RHSExpr,
SourceLocation Loc,
Sema &Sema) {
MemberExpr *ML = dyn_cast<MemberExpr>(LHSExpr);
MemberExpr *MR = dyn_cast<MemberExpr>(RHSExpr);
if (ML && MR && ML->getMemberDecl() == MR->getMemberDecl()) {
if (isa<CXXThisExpr>(ML->getBase()) && isa<CXXThisExpr>(MR->getBase()))
Sema.Diag(Loc, diag::warn_identity_field_assign) << 0;
}
ObjCIvarRefExpr *OL = dyn_cast<ObjCIvarRefExpr>(LHSExpr);
ObjCIvarRefExpr *OR = dyn_cast<ObjCIvarRefExpr>(RHSExpr);
if (OL && OR && OL->getDecl() == OR->getDecl()) {
DeclRefExpr *RL = dyn_cast<DeclRefExpr>(OL->getBase()->IgnoreImpCasts());
DeclRefExpr *RR = dyn_cast<DeclRefExpr>(OR->getBase()->IgnoreImpCasts());
if (RL && RR && RL->getDecl() == RR->getDecl())
Sema.Diag(Loc, diag::warn_identity_field_assign) << 1;
}
}
QualType Sema::CheckAssignmentOperands(Expr *LHSExpr, ExprResult &RHS,
SourceLocation Loc,
QualType CompoundType) {
assert(!LHSExpr->hasPlaceholderType(BuiltinType::PseudoObject));
if (CheckForModifiableLvalue(LHSExpr, Loc, *this))
return QualType();
QualType LHSType = LHSExpr->getType();
QualType RHSType = CompoundType.isNull() ? RHS.get()->getType() :
CompoundType;
AssignConvertType ConvTy;
if (CompoundType.isNull()) {
Expr *RHSCheck = RHS.get();
CheckIdentityFieldAssignment(LHSExpr, RHSCheck, Loc, *this);
QualType LHSTy(LHSType);
ConvTy = CheckSingleAssignmentConstraints(LHSTy, RHS);
if (RHS.isInvalid())
return QualType();
if (ConvTy == IncompatiblePointer &&
((Context.isObjCNSObjectType(LHSType) &&
RHSType->isObjCObjectPointerType()) ||
(Context.isObjCNSObjectType(RHSType) &&
LHSType->isObjCObjectPointerType())))
ConvTy = Compatible;
if (ConvTy == Compatible &&
LHSType->isObjCObjectType())
Diag(Loc, diag::err_objc_object_assignment)
<< LHSType;
if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(RHSCheck))
RHSCheck = ICE->getSubExpr();
if (UnaryOperator *UO = dyn_cast<UnaryOperator>(RHSCheck)) {
if ((UO->getOpcode() == UO_Plus ||
UO->getOpcode() == UO_Minus) &&
Loc.isFileID() && UO->getOperatorLoc().isFileID() &&
Loc.getLocWithOffset(1) == UO->getOperatorLoc() &&
Loc.getLocWithOffset(2) != UO->getSubExpr()->getLocStart() &&
UO->getSubExpr()->getLocStart().isFileID()) {
Diag(Loc, diag::warn_not_compound_assign)
<< (UO->getOpcode() == UO_Plus ? "+" : "-")
<< SourceRange(UO->getOperatorLoc(), UO->getOperatorLoc());
}
}
if (ConvTy == Compatible) {
if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong) {
const Expr *InnerLHS = LHSExpr->IgnoreParenCasts();
const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InnerLHS);
if (!DRE || DRE->getDecl()->hasAttr<BlocksAttr>())
checkRetainCycles(LHSExpr, RHS.get());
DiagnosticsEngine::Level Level =
Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
RHS.get()->getLocStart());
if (Level != DiagnosticsEngine::Ignored)
getCurFunction()->markSafeWeakUse(RHS.get());
} else if (getLangOpts().ObjCAutoRefCount) {
checkUnsafeExprAssigns(Loc, LHSExpr, RHS.get());
}
}
} else {
ConvTy = CheckAssignmentConstraints(Loc, LHSType, RHSType);
}
if (DiagnoseAssignmentResult(ConvTy, Loc, LHSType, RHSType,
RHS.get(), AA_Assigning))
return QualType();
CheckForNullPointerDereference(*this, LHSExpr);
return (getLangOpts().CPlusPlus
? LHSType : LHSType.getUnqualifiedType());
}
static QualType CheckCommaOperands(Sema &S, ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc) {
LHS = S.CheckPlaceholderExpr(LHS.take());
RHS = S.CheckPlaceholderExpr(RHS.take());
if (LHS.isInvalid() || RHS.isInvalid())
return QualType();
LHS = S.IgnoredValueConversions(LHS.take());
if (LHS.isInvalid())
return QualType();
S.DiagnoseUnusedExprResult(LHS.get());
if (!S.getLangOpts().CPlusPlus) {
RHS = S.DefaultFunctionArrayLvalueConversion(RHS.take());
if (RHS.isInvalid())
return QualType();
if (!RHS.get()->getType()->isVoidType())
S.RequireCompleteType(Loc, RHS.get()->getType(),
diag::err_incomplete_type);
}
return RHS.get()->getType();
}
static QualType CheckIncrementDecrementOperand(Sema &S, Expr *Op,
ExprValueKind &VK,
SourceLocation OpLoc,
bool IsInc, bool IsPrefix) {
if (Op->isTypeDependent())
return S.Context.DependentTy;
QualType ResType = Op->getType();
if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>())
ResType = ResAtomicType->getValueType();
assert(!ResType.isNull() && "no type for increment/decrement expression");
if (S.getLangOpts().CPlusPlus && ResType->isBooleanType()) {
if (!IsInc) {
S.Diag(OpLoc, diag::err_decrement_bool) << Op->getSourceRange();
return QualType();
}
S.Diag(OpLoc, diag::warn_increment_bool) << Op->getSourceRange();
} else if (ResType->isRealType()) {
} else if (ResType->isPointerType()) {
if (!checkArithmeticOpPointerOperand(S, OpLoc, Op))
return QualType();
} else if (ResType->isObjCObjectPointerType()) {
if (checkArithmeticIncompletePointerType(S, OpLoc, Op) ||
checkArithmeticOnObjCPointer(S, OpLoc, Op))
return QualType();
} else if (ResType->isAnyComplexType()) {
S.Diag(OpLoc, diag::ext_integer_increment_complex)
<< ResType << Op->getSourceRange();
} else if (ResType->isPlaceholderType()) {
ExprResult PR = S.CheckPlaceholderExpr(Op);
if (PR.isInvalid()) return QualType();
return CheckIncrementDecrementOperand(S, PR.take(), VK, OpLoc,
IsInc, IsPrefix);
} else if (S.getLangOpts().AltiVec && ResType->isVectorType()) {
} else {
S.Diag(OpLoc, diag::err_typecheck_illegal_increment_decrement)
<< ResType << int(IsInc) << Op->getSourceRange();
return QualType();
}
if (CheckForModifiableLvalue(Op, OpLoc, S))
return QualType();
if (IsPrefix && S.getLangOpts().CPlusPlus) {
VK = VK_LValue;
return ResType;
} else {
VK = VK_RValue;
return ResType.getUnqualifiedType();
}
}
static ValueDecl *getPrimaryDecl(Expr *E) {
switch (E->getStmtClass()) {
case Stmt::DeclRefExprClass:
return cast<DeclRefExpr>(E)->getDecl();
case Stmt::MemberExprClass:
if (cast<MemberExpr>(E)->isArrow())
return 0;
return getPrimaryDecl(cast<MemberExpr>(E)->getBase());
case Stmt::ArraySubscriptExprClass: {
Expr* Base = cast<ArraySubscriptExpr>(E)->getBase();
if (ImplicitCastExpr* ICE = dyn_cast<ImplicitCastExpr>(Base)) {
if (ICE->getSubExpr()->getType()->isArrayType())
return getPrimaryDecl(ICE->getSubExpr());
}
return 0;
}
case Stmt::UnaryOperatorClass: {
UnaryOperator *UO = cast<UnaryOperator>(E);
switch(UO->getOpcode()) {
case UO_Real:
case UO_Imag:
case UO_Extension:
return getPrimaryDecl(UO->getSubExpr());
default:
return 0;
}
}
case Stmt::ParenExprClass:
return getPrimaryDecl(cast<ParenExpr>(E)->getSubExpr());
case Stmt::ImplicitCastExprClass:
return getPrimaryDecl(cast<ImplicitCastExpr>(E)->getSubExpr());
default:
return 0;
}
}
namespace {
enum {
AO_Bit_Field = 0,
AO_Vector_Element = 1,
AO_Property_Expansion = 2,
AO_Register_Variable = 3,
AO_No_Error = 4
};
}
static void diagnoseAddressOfInvalidType(Sema &S, SourceLocation Loc,
Expr *E, unsigned Type) {
S.Diag(Loc, diag::err_typecheck_address_of) << Type << E->getSourceRange();
}
static QualType CheckAddressOfOperand(Sema &S, ExprResult &OrigOp,
SourceLocation OpLoc) {
if (const BuiltinType *PTy = OrigOp.get()->getType()->getAsPlaceholderType()){
if (PTy->getKind() == BuiltinType::Overload) {
if (!isa<OverloadExpr>(OrigOp.get()->IgnoreParens())) {
S.Diag(OpLoc, diag::err_typecheck_invalid_lvalue_addrof)
<< OrigOp.get()->getSourceRange();
return QualType();
}
return S.Context.OverloadTy;
}
if (PTy->getKind() == BuiltinType::UnknownAny)
return S.Context.UnknownAnyTy;
if (PTy->getKind() == BuiltinType::BoundMember) {
S.Diag(OpLoc, diag::err_invalid_form_pointer_member_function)
<< OrigOp.get()->getSourceRange();
return QualType();
}
OrigOp = S.CheckPlaceholderExpr(OrigOp.take());
if (OrigOp.isInvalid()) return QualType();
}
if (OrigOp.get()->isTypeDependent())
return S.Context.DependentTy;
assert(!OrigOp.get()->getType()->isPlaceholderType());
Expr *op = OrigOp.get()->IgnoreParens();
if (S.getLangOpts().C99) {
if (UnaryOperator* uOp = dyn_cast<UnaryOperator>(op)) {
if (uOp->getOpcode() == UO_Deref)
return uOp->getSubExpr()->getType();
}
}
ValueDecl *dcl = getPrimaryDecl(op);
Expr::LValueClassification lval = op->ClassifyLValue(S.Context);
unsigned AddressOfError = AO_No_Error;
if (lval == Expr::LV_ClassTemporary) {
bool sfinae = S.isSFINAEContext();
S.Diag(OpLoc, sfinae ? diag::err_typecheck_addrof_class_temporary
: diag::ext_typecheck_addrof_class_temporary)
<< op->getType() << op->getSourceRange();
if (sfinae)
return QualType();
} else if (isa<ObjCSelectorExpr>(op)) {
return S.Context.getPointerType(op->getType());
} else if (lval == Expr::LV_MemberFunction) {
if (!isa<DeclRefExpr>(op)) {
S.Diag(OpLoc, diag::err_invalid_form_pointer_member_function)
<< OrigOp.get()->getSourceRange();
return QualType();
}
DeclRefExpr *DRE = cast<DeclRefExpr>(op);
CXXMethodDecl *MD = cast<CXXMethodDecl>(DRE->getDecl());
if (OrigOp.get() != DRE) {
S.Diag(OpLoc, diag::err_parens_pointer_member_function)
<< OrigOp.get()->getSourceRange();
} else if (!DRE->getQualifier()) {
S.Diag(OpLoc, diag::err_unqualified_pointer_member_function)
<< op->getSourceRange();
}
return S.Context.getMemberPointerType(op->getType(),
S.Context.getTypeDeclType(MD->getParent()).getTypePtr());
} else if (lval != Expr::LV_Valid && lval != Expr::LV_IncompleteVoidType) {
if (!op->getType()->isFunctionType()) {
if (isa<PseudoObjectExpr>(op)) {
AddressOfError = AO_Property_Expansion;
} else {
S.Diag(OpLoc, diag::err_typecheck_invalid_lvalue_addrof)
<< op->getSourceRange();
return QualType();
}
}
} else if (op->getObjectKind() == OK_BitField) { AddressOfError = AO_Bit_Field;
} else if (op->getObjectKind() == OK_VectorComponent) {
AddressOfError = AO_Vector_Element;
} else if (dcl) { if (const VarDecl *vd = dyn_cast<VarDecl>(dcl)) {
if (vd->getStorageClass() == SC_Register &&
!S.getLangOpts().CPlusPlus) {
AddressOfError = AO_Register_Variable;
}
} else if (isa<FunctionTemplateDecl>(dcl)) {
return S.Context.OverloadTy;
} else if (isa<FieldDecl>(dcl) || isa<IndirectFieldDecl>(dcl)) {
if (isa<DeclRefExpr>(op) && cast<DeclRefExpr>(op)->getQualifier()) {
DeclContext *Ctx = dcl->getDeclContext();
if (Ctx && Ctx->isRecord()) {
if (dcl->getType()->isReferenceType()) {
S.Diag(OpLoc,
diag::err_cannot_form_pointer_to_member_of_reference_type)
<< dcl->getDeclName() << dcl->getType();
return QualType();
}
while (cast<RecordDecl>(Ctx)->isAnonymousStructOrUnion())
Ctx = Ctx->getParent();
return S.Context.getMemberPointerType(op->getType(),
S.Context.getTypeDeclType(cast<RecordDecl>(Ctx)).getTypePtr());
}
}
} else if (!isa<FunctionDecl>(dcl) && !isa<NonTypeTemplateParmDecl>(dcl))
llvm_unreachable("Unknown/unexpected decl type");
}
if (AddressOfError != AO_No_Error) {
diagnoseAddressOfInvalidType(S, OpLoc, op, AddressOfError);
return QualType();
}
if (lval == Expr::LV_IncompleteVoidType) {
S.Diag(OpLoc, diag::ext_typecheck_addrof_void) << op->getSourceRange();
}
if (op->getType()->isObjCObjectType())
return S.Context.getObjCObjectPointerType(op->getType());
return S.Context.getPointerType(op->getType());
}
static QualType CheckIndirectionOperand(Sema &S, Expr *Op, ExprValueKind &VK,
SourceLocation OpLoc) {
if (Op->isTypeDependent())
return S.Context.DependentTy;
ExprResult ConvResult = S.UsualUnaryConversions(Op);
if (ConvResult.isInvalid())
return QualType();
Op = ConvResult.take();
QualType OpTy = Op->getType();
QualType Result;
if (isa<CXXReinterpretCastExpr>(Op)) {
QualType OpOrigType = Op->IgnoreParenCasts()->getType();
S.CheckCompatibleReinterpretCast(OpOrigType, OpTy, true,
Op->getSourceRange());
}
if (const PointerType *PT = OpTy->getAs<PointerType>())
Result = PT->getPointeeType();
else if (const ObjCObjectPointerType *OPT =
OpTy->getAs<ObjCObjectPointerType>())
Result = OPT->getPointeeType();
else {
ExprResult PR = S.CheckPlaceholderExpr(Op);
if (PR.isInvalid()) return QualType();
if (PR.take() != Op)
return CheckIndirectionOperand(S, PR.take(), VK, OpLoc);
}
if (Result.isNull()) {
S.Diag(OpLoc, diag::err_typecheck_indirection_requires_pointer)
<< OpTy << Op->getSourceRange();
return QualType();
}
VK = VK_LValue;
if (!S.getLangOpts().CPlusPlus && Result.isCForbiddenLValueType())
VK = VK_RValue;
return Result;
}
static inline BinaryOperatorKind ConvertTokenKindToBinaryOpcode(
tok::TokenKind Kind) {
BinaryOperatorKind Opc;
switch (Kind) {
default: llvm_unreachable("Unknown binop!");
case tok::periodstar: Opc = BO_PtrMemD; break;
case tok::arrowstar: Opc = BO_PtrMemI; break;
case tok::star: Opc = BO_Mul; break;
case tok::slash: Opc = BO_Div; break;
case tok::percent: Opc = BO_Rem; break;
case tok::plus: Opc = BO_Add; break;
case tok::minus: Opc = BO_Sub; break;
case tok::lessless: Opc = BO_Shl; break;
case tok::greatergreater: Opc = BO_Shr; break;
case tok::lessequal: Opc = BO_LE; break;
case tok::less: Opc = BO_LT; break;
case tok::greaterequal: Opc = BO_GE; break;
case tok::greater: Opc = BO_GT; break;
case tok::exclaimequal: Opc = BO_NE; break;
case tok::equalequal: Opc = BO_EQ; break;
case tok::amp: Opc = BO_And; break;
case tok::caret: Opc = BO_Xor; break;
case tok::pipe: Opc = BO_Or; break;
case tok::ampamp: Opc = BO_LAnd; break;
case tok::pipepipe: Opc = BO_LOr; break;
case tok::equal: Opc = BO_Assign; break;
case tok::starequal: Opc = BO_MulAssign; break;
case tok::slashequal: Opc = BO_DivAssign; break;
case tok::percentequal: Opc = BO_RemAssign; break;
case tok::plusequal: Opc = BO_AddAssign; break;
case tok::minusequal: Opc = BO_SubAssign; break;
case tok::lesslessequal: Opc = BO_ShlAssign; break;
case tok::greatergreaterequal: Opc = BO_ShrAssign; break;
case tok::ampequal: Opc = BO_AndAssign; break;
case tok::caretequal: Opc = BO_XorAssign; break;
case tok::pipeequal: Opc = BO_OrAssign; break;
case tok::comma: Opc = BO_Comma; break;
}
return Opc;
}
static inline UnaryOperatorKind ConvertTokenKindToUnaryOpcode(
tok::TokenKind Kind) {
UnaryOperatorKind Opc;
switch (Kind) {
default: llvm_unreachable("Unknown unary op!");
case tok::plusplus: Opc = UO_PreInc; break;
case tok::minusminus: Opc = UO_PreDec; break;
case tok::amp: Opc = UO_AddrOf; break;
case tok::star: Opc = UO_Deref; break;
case tok::plus: Opc = UO_Plus; break;
case tok::minus: Opc = UO_Minus; break;
case tok::tilde: Opc = UO_Not; break;
case tok::exclaim: Opc = UO_LNot; break;
case tok::kw___real: Opc = UO_Real; break;
case tok::kw___imag: Opc = UO_Imag; break;
case tok::kw___extension__: Opc = UO_Extension; break;
}
return Opc;
}
static void DiagnoseSelfAssignment(Sema &S, Expr *LHSExpr, Expr *RHSExpr,
SourceLocation OpLoc) {
if (!S.ActiveTemplateInstantiations.empty())
return;
if (OpLoc.isInvalid() || OpLoc.isMacroID())
return;
LHSExpr = LHSExpr->IgnoreParenImpCasts();
RHSExpr = RHSExpr->IgnoreParenImpCasts();
const DeclRefExpr *LHSDeclRef = dyn_cast<DeclRefExpr>(LHSExpr);
const DeclRefExpr *RHSDeclRef = dyn_cast<DeclRefExpr>(RHSExpr);
if (!LHSDeclRef || !RHSDeclRef ||
LHSDeclRef->getLocation().isMacroID() ||
RHSDeclRef->getLocation().isMacroID())
return;
const ValueDecl *LHSDecl =
cast<ValueDecl>(LHSDeclRef->getDecl()->getCanonicalDecl());
const ValueDecl *RHSDecl =
cast<ValueDecl>(RHSDeclRef->getDecl()->getCanonicalDecl());
if (LHSDecl != RHSDecl)
return;
if (LHSDecl->getType().isVolatileQualified())
return;
if (const ReferenceType *RefTy = LHSDecl->getType()->getAs<ReferenceType>())
if (RefTy->getPointeeType().isVolatileQualified())
return;
S.Diag(OpLoc, diag::warn_self_assignment)
<< LHSDeclRef->getType()
<< LHSExpr->getSourceRange() << RHSExpr->getSourceRange();
}
ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc,
BinaryOperatorKind Opc,
Expr *LHSExpr, Expr *RHSExpr) {
if (getLangOpts().CPlusPlus0x && isa<InitListExpr>(RHSExpr)) {
InitializationKind Kind =
InitializationKind::CreateDirectList(RHSExpr->getLocStart());
InitializedEntity Entity =
InitializedEntity::InitializeTemporary(LHSExpr->getType());
InitializationSequence InitSeq(*this, Entity, Kind, &RHSExpr, 1);
ExprResult Init = InitSeq.Perform(*this, Entity, Kind, RHSExpr);
if (Init.isInvalid())
return Init;
RHSExpr = Init.take();
}
ExprResult LHS = Owned(LHSExpr), RHS = Owned(RHSExpr);
QualType ResultTy; QualType CompLHSTy; QualType CompResultTy; ExprValueKind VK = VK_RValue;
ExprObjectKind OK = OK_Ordinary;
switch (Opc) {
case BO_Assign:
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, QualType());
if (getLangOpts().CPlusPlus &&
LHS.get()->getObjectKind() != OK_ObjCProperty) {
VK = LHS.get()->getValueKind();
OK = LHS.get()->getObjectKind();
}
if (!ResultTy.isNull())
DiagnoseSelfAssignment(*this, LHS.get(), RHS.get(), OpLoc);
break;
case BO_PtrMemD:
case BO_PtrMemI:
ResultTy = CheckPointerToMemberOperands(LHS, RHS, VK, OpLoc,
Opc == BO_PtrMemI);
break;
case BO_Mul:
case BO_Div:
ResultTy = CheckMultiplyDivideOperands(LHS, RHS, OpLoc, false,
Opc == BO_Div);
break;
case BO_Rem:
ResultTy = CheckRemainderOperands(LHS, RHS, OpLoc);
break;
case BO_Add:
ResultTy = CheckAdditionOperands(LHS, RHS, OpLoc, Opc);
break;
case BO_Sub:
ResultTy = CheckSubtractionOperands(LHS, RHS, OpLoc);
break;
case BO_Shl:
case BO_Shr:
ResultTy = CheckShiftOperands(LHS, RHS, OpLoc, Opc);
break;
case BO_LE:
case BO_LT:
case BO_GE:
case BO_GT:
ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc, true);
break;
case BO_EQ:
case BO_NE:
ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc, false);
break;
case BO_And:
case BO_Xor:
case BO_Or:
ResultTy = CheckBitwiseOperands(LHS, RHS, OpLoc);
break;
case BO_LAnd:
case BO_LOr:
ResultTy = CheckLogicalOperands(LHS, RHS, OpLoc, Opc);
break;
case BO_MulAssign:
case BO_DivAssign:
CompResultTy = CheckMultiplyDivideOperands(LHS, RHS, OpLoc, true,
Opc == BO_DivAssign);
CompLHSTy = CompResultTy;
if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid())
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy);
break;
case BO_RemAssign:
CompResultTy = CheckRemainderOperands(LHS, RHS, OpLoc, true);
CompLHSTy = CompResultTy;
if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid())
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy);
break;
case BO_AddAssign:
CompResultTy = CheckAdditionOperands(LHS, RHS, OpLoc, Opc, &CompLHSTy);
if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid())
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy);
break;
case BO_SubAssign:
CompResultTy = CheckSubtractionOperands(LHS, RHS, OpLoc, &CompLHSTy);
if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid())
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy);
break;
case BO_ShlAssign:
case BO_ShrAssign:
CompResultTy = CheckShiftOperands(LHS, RHS, OpLoc, Opc, true);
CompLHSTy = CompResultTy;
if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid())
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy);
break;
case BO_AndAssign:
case BO_XorAssign:
case BO_OrAssign:
CompResultTy = CheckBitwiseOperands(LHS, RHS, OpLoc, true);
CompLHSTy = CompResultTy;
if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid())
ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy);
break;
case BO_Comma:
ResultTy = CheckCommaOperands(*this, LHS, RHS, OpLoc);
if (getLangOpts().CPlusPlus && !RHS.isInvalid()) {
VK = RHS.get()->getValueKind();
OK = RHS.get()->getObjectKind();
}
break;
}
if (ResultTy.isNull() || LHS.isInvalid() || RHS.isInvalid())
return ExprError();
CheckArrayAccess(LHS.get());
CheckArrayAccess(RHS.get());
if (CompResultTy.isNull())
return Owned(new (Context) BinaryOperator(LHS.take(), RHS.take(), Opc,
ResultTy, VK, OK, OpLoc,
FPFeatures.fp_contract));
if (getLangOpts().CPlusPlus && LHS.get()->getObjectKind() !=
OK_ObjCProperty) {
VK = VK_LValue;
OK = LHS.get()->getObjectKind();
}
return Owned(new (Context) CompoundAssignOperator(LHS.take(), RHS.take(), Opc,
ResultTy, VK, OK, CompLHSTy,
CompResultTy, OpLoc,
FPFeatures.fp_contract));
}
static void DiagnoseBitwisePrecedence(Sema &Self, BinaryOperatorKind Opc,
SourceLocation OpLoc, Expr *LHSExpr,
Expr *RHSExpr) {
typedef BinaryOperator BinOp;
BinOp::Opcode LHSopc = static_cast<BinOp::Opcode>(-1),
RHSopc = static_cast<BinOp::Opcode>(-1);
if (BinOp *BO = dyn_cast<BinOp>(LHSExpr))
LHSopc = BO->getOpcode();
if (BinOp *BO = dyn_cast<BinOp>(RHSExpr))
RHSopc = BO->getOpcode();
if (LHSopc == -1 && RHSopc == -1)
return;
if ((BinOp::isComparisonOp(LHSopc) || BinOp::isBitwiseOp(LHSopc)) &&
(BinOp::isComparisonOp(RHSopc) || BinOp::isBitwiseOp(RHSopc)))
return;
bool isLeftComp = BinOp::isComparisonOp(LHSopc);
bool isRightComp = BinOp::isComparisonOp(RHSopc);
if (!isLeftComp && !isRightComp) return;
SourceRange DiagRange = isLeftComp ? SourceRange(LHSExpr->getLocStart(),
OpLoc)
: SourceRange(OpLoc, RHSExpr->getLocEnd());
std::string OpStr = isLeftComp ? BinOp::getOpcodeStr(LHSopc)
: BinOp::getOpcodeStr(RHSopc);
SourceRange ParensRange = isLeftComp ?
SourceRange(cast<BinOp>(LHSExpr)->getRHS()->getLocStart(),
RHSExpr->getLocEnd())
: SourceRange(LHSExpr->getLocStart(),
cast<BinOp>(RHSExpr)->getLHS()->getLocStart());
Self.Diag(OpLoc, diag::warn_precedence_bitwise_rel)
<< DiagRange << BinOp::getOpcodeStr(Opc) << OpStr;
SuggestParentheses(Self, OpLoc,
Self.PDiag(diag::note_precedence_bitwise_silence) << OpStr,
(isLeftComp ? LHSExpr : RHSExpr)->getSourceRange());
SuggestParentheses(Self, OpLoc,
Self.PDiag(diag::note_precedence_bitwise_first) << BinOp::getOpcodeStr(Opc),
ParensRange);
}
static void
EmitDiagnosticForBitwiseAndInBitwiseOr(Sema &Self, SourceLocation OpLoc,
BinaryOperator *Bop) {
assert(Bop->getOpcode() == BO_And);
Self.Diag(Bop->getOperatorLoc(), diag::warn_bitwise_and_in_bitwise_or)
<< Bop->getSourceRange() << OpLoc;
SuggestParentheses(Self, Bop->getOperatorLoc(),
Self.PDiag(diag::note_bitwise_and_in_bitwise_or_silence),
Bop->getSourceRange());
}
static void
EmitDiagnosticForLogicalAndInLogicalOr(Sema &Self, SourceLocation OpLoc,
BinaryOperator *Bop) {
assert(Bop->getOpcode() == BO_LAnd);
Self.Diag(Bop->getOperatorLoc(), diag::warn_logical_and_in_logical_or)
<< Bop->getSourceRange() << OpLoc;
SuggestParentheses(Self, Bop->getOperatorLoc(),
Self.PDiag(diag::note_logical_and_in_logical_or_silence),
Bop->getSourceRange());
}
static bool EvaluatesAsTrue(Sema &S, Expr *E) {
bool Res;
return E->EvaluateAsBooleanCondition(Res, S.getASTContext()) && Res;
}
static bool EvaluatesAsFalse(Sema &S, Expr *E) {
bool Res;
return E->EvaluateAsBooleanCondition(Res, S.getASTContext()) && !Res;
}
static void DiagnoseLogicalAndInLogicalOrLHS(Sema &S, SourceLocation OpLoc,
Expr *LHSExpr, Expr *RHSExpr) {
if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(LHSExpr)) {
if (Bop->getOpcode() == BO_LAnd) {
if (EvaluatesAsFalse(S, RHSExpr))
return;
if (!EvaluatesAsTrue(S, Bop->getLHS()))
return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, Bop);
} else if (Bop->getOpcode() == BO_LOr) {
if (BinaryOperator *RBop = dyn_cast<BinaryOperator>(Bop->getRHS())) {
if (RBop->getOpcode() == BO_LAnd && EvaluatesAsTrue(S, RBop->getRHS()))
return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, RBop);
}
}
}
}
static void DiagnoseLogicalAndInLogicalOrRHS(Sema &S, SourceLocation OpLoc,
Expr *LHSExpr, Expr *RHSExpr) {
if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(RHSExpr)) {
if (Bop->getOpcode() == BO_LAnd) {
if (EvaluatesAsFalse(S, LHSExpr))
return;
if (!EvaluatesAsTrue(S, Bop->getRHS()))
return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, Bop);
}
}
}
static void DiagnoseBitwiseAndInBitwiseOr(Sema &S, SourceLocation OpLoc,
Expr *OrArg) {
if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(OrArg)) {
if (Bop->getOpcode() == BO_And)
return EmitDiagnosticForBitwiseAndInBitwiseOr(S, OpLoc, Bop);
}
}
static void DiagnoseBinOpPrecedence(Sema &Self, BinaryOperatorKind Opc,
SourceLocation OpLoc, Expr *LHSExpr,
Expr *RHSExpr){
if (BinaryOperator::isBitwiseOp(Opc))
DiagnoseBitwisePrecedence(Self, Opc, OpLoc, LHSExpr, RHSExpr);
if (Opc == BO_Or && !OpLoc.isMacroID()) {
DiagnoseBitwiseAndInBitwiseOr(Self, OpLoc, LHSExpr);
DiagnoseBitwiseAndInBitwiseOr(Self, OpLoc, RHSExpr);
}
if (Opc == BO_LOr && !OpLoc.isMacroID()) {
DiagnoseLogicalAndInLogicalOrLHS(Self, OpLoc, LHSExpr, RHSExpr);
DiagnoseLogicalAndInLogicalOrRHS(Self, OpLoc, LHSExpr, RHSExpr);
}
}
ExprResult Sema::ActOnBinOp(Scope *S, SourceLocation TokLoc,
tok::TokenKind Kind,
Expr *LHSExpr, Expr *RHSExpr) {
BinaryOperatorKind Opc = ConvertTokenKindToBinaryOpcode(Kind);
assert((LHSExpr != 0) && "ActOnBinOp(): missing left expression");
assert((RHSExpr != 0) && "ActOnBinOp(): missing right expression");
DiagnoseBinOpPrecedence(*this, Opc, TokLoc, LHSExpr, RHSExpr);
return BuildBinOp(S, TokLoc, Opc, LHSExpr, RHSExpr);
}
static ExprResult BuildOverloadedBinOp(Sema &S, Scope *Sc, SourceLocation OpLoc,
BinaryOperatorKind Opc,
Expr *LHS, Expr *RHS) {
UnresolvedSet<16> Functions;
OverloadedOperatorKind OverOp
= BinaryOperator::getOverloadedOperator(Opc);
if (Sc && OverOp != OO_None)
S.LookupOverloadedOperatorName(OverOp, Sc, LHS->getType(),
RHS->getType(), Functions);
return S.CreateOverloadedBinOp(OpLoc, Opc, Functions, LHS, RHS);
}
ExprResult Sema::BuildBinOp(Scope *S, SourceLocation OpLoc,
BinaryOperatorKind Opc,
Expr *LHSExpr, Expr *RHSExpr) {
if (const BuiltinType *pty = LHSExpr->getType()->getAsPlaceholderType()) {
if (pty->getKind() == BuiltinType::PseudoObject &&
BinaryOperator::isAssignmentOp(Opc))
return checkPseudoObjectAssignment(S, OpLoc, Opc, LHSExpr, RHSExpr);
if (pty->getKind() == BuiltinType::Overload) {
ExprResult resolvedRHS = CheckPlaceholderExpr(RHSExpr);
if (resolvedRHS.isInvalid()) return ExprError();
RHSExpr = resolvedRHS.take();
if (RHSExpr->isTypeDependent() ||
RHSExpr->getType()->isOverloadableType())
return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr);
}
ExprResult LHS = CheckPlaceholderExpr(LHSExpr);
if (LHS.isInvalid()) return ExprError();
LHSExpr = LHS.take();
}
if (const BuiltinType *pty = RHSExpr->getType()->getAsPlaceholderType()) {
if (Opc == BO_Assign && pty->getKind() == BuiltinType::Overload) {
if (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent())
return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr);
if (LHSExpr->getType()->isOverloadableType())
return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr);
return CreateBuiltinBinOp(OpLoc, Opc, LHSExpr, RHSExpr);
}
if (pty->getKind() == BuiltinType::Overload &&
LHSExpr->getType()->isOverloadableType())
return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr);
ExprResult resolvedRHS = CheckPlaceholderExpr(RHSExpr);
if (!resolvedRHS.isUsable()) return ExprError();
RHSExpr = resolvedRHS.take();
}
if (getLangOpts().CPlusPlus) {
if (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent())
return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr);
if (LHSExpr->getType()->isOverloadableType() ||
RHSExpr->getType()->isOverloadableType())
return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr);
}
return CreateBuiltinBinOp(OpLoc, Opc, LHSExpr, RHSExpr);
}
ExprResult Sema::CreateBuiltinUnaryOp(SourceLocation OpLoc,
UnaryOperatorKind Opc,
Expr *InputExpr) {
ExprResult Input = Owned(InputExpr);
ExprValueKind VK = VK_RValue;
ExprObjectKind OK = OK_Ordinary;
QualType resultType;
switch (Opc) {
case UO_PreInc:
case UO_PreDec:
case UO_PostInc:
case UO_PostDec:
resultType = CheckIncrementDecrementOperand(*this, Input.get(), VK, OpLoc,
Opc == UO_PreInc ||
Opc == UO_PostInc,
Opc == UO_PreInc ||
Opc == UO_PreDec);
break;
case UO_AddrOf:
resultType = CheckAddressOfOperand(*this, Input, OpLoc);
break;
case UO_Deref: {
Input = DefaultFunctionArrayLvalueConversion(Input.take());
if (Input.isInvalid()) return ExprError();
resultType = CheckIndirectionOperand(*this, Input.get(), VK, OpLoc);
break;
}
case UO_Plus:
case UO_Minus:
Input = UsualUnaryConversions(Input.take());
if (Input.isInvalid()) return ExprError();
resultType = Input.get()->getType();
if (resultType->isDependentType())
break;
if (resultType->isArithmeticType() || resultType->isVectorType())
break;
else if (getLangOpts().CPlusPlus && resultType->isEnumeralType())
break;
else if (getLangOpts().CPlusPlus && Opc == UO_Plus &&
resultType->isPointerType())
break;
return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr)
<< resultType << Input.get()->getSourceRange());
case UO_Not: Input = UsualUnaryConversions(Input.take());
if (Input.isInvalid()) return ExprError();
resultType = Input.get()->getType();
if (resultType->isDependentType())
break;
if (resultType->isComplexType() || resultType->isComplexIntegerType())
Diag(OpLoc, diag::ext_integer_complement_complex)
<< resultType << Input.get()->getSourceRange();
else if (resultType->hasIntegerRepresentation())
break;
else {
return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr)
<< resultType << Input.get()->getSourceRange());
}
break;
case UO_LNot: Input = DefaultFunctionArrayLvalueConversion(Input.take());
if (Input.isInvalid()) return ExprError();
resultType = Input.get()->getType();
if (resultType->isHalfType()) {
Input = ImpCastExprToType(Input.take(), Context.FloatTy, CK_FloatingCast).take();
resultType = Context.FloatTy;
}
if (resultType->isDependentType())
break;
if (resultType->isScalarType()) {
if (Context.getLangOpts().CPlusPlus) {
Input = ImpCastExprToType(Input.take(), Context.BoolTy,
ScalarTypeToBooleanCastKind(resultType));
}
} else if (resultType->isExtVectorType()) {
resultType = GetSignedVectorType(resultType);
break;
} else {
return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr)
<< resultType << Input.get()->getSourceRange());
}
resultType = Context.getLogicalOperationType();
break;
case UO_Real:
case UO_Imag:
resultType = CheckRealImagOperand(*this, Input, OpLoc, Opc == UO_Real);
if (Input.isInvalid()) return ExprError();
if (Opc == UO_Real || Input.get()->getType()->isAnyComplexType()) {
if (Input.get()->getValueKind() != VK_RValue &&
Input.get()->getObjectKind() == OK_Ordinary)
VK = Input.get()->getValueKind();
} else if (!getLangOpts().CPlusPlus) {
Input = DefaultLvalueConversion(Input.take());
}
break;
case UO_Extension:
resultType = Input.get()->getType();
VK = Input.get()->getValueKind();
OK = Input.get()->getObjectKind();
break;
}
if (resultType.isNull() || Input.isInvalid())
return ExprError();
if (Opc != UO_AddrOf && Opc != UO_Deref)
CheckArrayAccess(Input.get());
return Owned(new (Context) UnaryOperator(Input.take(), Opc, resultType,
VK, OK, OpLoc));
}
static bool isQualifiedMemberAccess(Expr *E) {
if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
if (!DRE->getQualifier())
return false;
ValueDecl *VD = DRE->getDecl();
if (!VD->isCXXClassMember())
return false;
if (isa<FieldDecl>(VD) || isa<IndirectFieldDecl>(VD))
return true;
if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(VD))
return Method->isInstance();
return false;
}
if (UnresolvedLookupExpr *ULE = dyn_cast<UnresolvedLookupExpr>(E)) {
if (!ULE->getQualifier())
return false;
for (UnresolvedLookupExpr::decls_iterator D = ULE->decls_begin(),
DEnd = ULE->decls_end();
D != DEnd; ++D) {
if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(*D)) {
if (Method->isInstance())
return true;
} else {
break;
}
}
return false;
}
return false;
}
ExprResult Sema::BuildUnaryOp(Scope *S, SourceLocation OpLoc,
UnaryOperatorKind Opc, Expr *Input) {
if (const BuiltinType *pty = Input->getType()->getAsPlaceholderType()) {
if (pty->getKind() == BuiltinType::PseudoObject &&
UnaryOperator::isIncrementDecrementOp(Opc))
return checkPseudoObjectIncDec(S, OpLoc, Opc, Input);
if (Opc == UO_Extension)
return CreateBuiltinUnaryOp(OpLoc, Opc, Input);
if (Opc == UO_AddrOf &&
(pty->getKind() == BuiltinType::Overload ||
pty->getKind() == BuiltinType::UnknownAny ||
pty->getKind() == BuiltinType::BoundMember))
return CreateBuiltinUnaryOp(OpLoc, Opc, Input);
ExprResult Result = CheckPlaceholderExpr(Input);
if (Result.isInvalid()) return ExprError();
Input = Result.take();
}
if (getLangOpts().CPlusPlus && Input->getType()->isOverloadableType() &&
UnaryOperator::getOverloadedOperator(Opc) != OO_None &&
!(Opc == UO_AddrOf && isQualifiedMemberAccess(Input))) {
UnresolvedSet<16> Functions;
OverloadedOperatorKind OverOp = UnaryOperator::getOverloadedOperator(Opc);
if (S && OverOp != OO_None)
LookupOverloadedOperatorName(OverOp, S, Input->getType(), QualType(),
Functions);
return CreateOverloadedUnaryOp(OpLoc, Opc, Functions, Input);
}
return CreateBuiltinUnaryOp(OpLoc, Opc, Input);
}
ExprResult Sema::ActOnUnaryOp(Scope *S, SourceLocation OpLoc,
tok::TokenKind Op, Expr *Input) {
return BuildUnaryOp(S, OpLoc, ConvertTokenKindToUnaryOpcode(Op), Input);
}
ExprResult Sema::ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
LabelDecl *TheDecl) {
TheDecl->setUsed();
return Owned(new (Context) AddrLabelExpr(OpLoc, LabLoc, TheDecl,
Context.getPointerType(Context.VoidTy)));
}
static Expr *maybeRebuildARCConsumingStmt(Stmt *Statement) {
ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(Statement);
if (!cleanups) return 0;
ImplicitCastExpr *cast = dyn_cast<ImplicitCastExpr>(cleanups->getSubExpr());
if (!cast || cast->getCastKind() != CK_ARCConsumeObject)
return 0;
Expr *producer = cast->getSubExpr();
assert(producer->getType() == cast->getType());
assert(producer->getValueKind() == cast->getValueKind());
cleanups->setSubExpr(producer);
return cleanups;
}
void Sema::ActOnStartStmtExpr() {
PushExpressionEvaluationContext(ExprEvalContexts.back().Context);
}
void Sema::ActOnStmtExprError() {
DiscardCleanupsInEvaluationContext();
PopExpressionEvaluationContext();
}
ExprResult
Sema::ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt,
SourceLocation RPLoc) { assert(SubStmt && isa<CompoundStmt>(SubStmt) && "Invalid action invocation!");
CompoundStmt *Compound = cast<CompoundStmt>(SubStmt);
if (hasAnyUnrecoverableErrorsInThisFunction())
DiscardCleanupsInEvaluationContext();
assert(!ExprNeedsCleanups && "cleanups within StmtExpr not correctly bound!");
PopExpressionEvaluationContext();
bool isFileScope
= (getCurFunctionOrMethodDecl() == 0) && (getCurBlock() == 0);
if (isFileScope)
return ExprError(Diag(LPLoc, diag::err_stmtexpr_file_scope));
QualType Ty = Context.VoidTy;
bool StmtExprMayBindToTemp = false;
if (!Compound->body_empty()) {
Stmt *LastStmt = Compound->body_back();
LabelStmt *LastLabelStmt = 0;
while (LabelStmt *Label = dyn_cast<LabelStmt>(LastStmt)) {
LastLabelStmt = Label;
LastStmt = Label->getSubStmt();
}
if (Expr *LastE = dyn_cast<Expr>(LastStmt)) {
ExprResult LastExpr = DefaultFunctionArrayConversion(LastE);
if (LastExpr.isInvalid())
return ExprError();
Ty = LastExpr.get()->getType().getUnqualifiedType();
if (!Ty->isDependentType() && !LastExpr.get()->isTypeDependent()) {
if (Expr *rebuiltLastStmt
= maybeRebuildARCConsumingStmt(LastExpr.get())) {
LastExpr = rebuiltLastStmt;
} else {
LastExpr = PerformCopyInitialization(
InitializedEntity::InitializeResult(LPLoc,
Ty,
false),
SourceLocation(),
LastExpr);
}
if (LastExpr.isInvalid())
return ExprError();
if (LastExpr.get() != 0) {
if (!LastLabelStmt)
Compound->setLastStmt(LastExpr.take());
else
LastLabelStmt->setSubStmt(LastExpr.take());
StmtExprMayBindToTemp = true;
}
}
}
}
Expr *ResStmtExpr = new (Context) StmtExpr(Compound, Ty, LPLoc, RPLoc);
if (StmtExprMayBindToTemp)
return MaybeBindToTemporary(ResStmtExpr);
return Owned(ResStmtExpr);
}
ExprResult Sema::BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
TypeSourceInfo *TInfo,
OffsetOfComponent *CompPtr,
unsigned NumComponents,
SourceLocation RParenLoc) {
QualType ArgTy = TInfo->getType();
bool Dependent = ArgTy->isDependentType();
SourceRange TypeRange = TInfo->getTypeLoc().getLocalSourceRange();
if (!Dependent && !ArgTy->isRecordType())
return ExprError(Diag(BuiltinLoc, diag::err_offsetof_record_type)
<< ArgTy << TypeRange);
if (!Dependent
&& RequireCompleteType(BuiltinLoc, ArgTy,
diag::err_offsetof_incomplete_type, TypeRange))
return ExprError();
if (NumComponents != 1)
Diag(BuiltinLoc, diag::ext_offsetof_extended_field_designator)
<< SourceRange(CompPtr[1].LocStart, CompPtr[NumComponents-1].LocEnd);
bool DidWarnAboutNonPOD = false;
QualType CurrentType = ArgTy;
typedef OffsetOfExpr::OffsetOfNode OffsetOfNode;
SmallVector<OffsetOfNode, 4> Comps;
SmallVector<Expr*, 4> Exprs;
for (unsigned i = 0; i != NumComponents; ++i) {
const OffsetOfComponent &OC = CompPtr[i];
if (OC.isBrackets) {
if (!CurrentType->isDependentType()) {
const ArrayType *AT = Context.getAsArrayType(CurrentType);
if(!AT)
return ExprError(Diag(OC.LocEnd, diag::err_offsetof_array_type)
<< CurrentType);
CurrentType = AT->getElementType();
} else
CurrentType = Context.DependentTy;
ExprResult IdxRval = DefaultLvalueConversion(static_cast<Expr*>(OC.U.E));
if (IdxRval.isInvalid())
return ExprError();
Expr *Idx = IdxRval.take();
if (!Idx->isTypeDependent() && !Idx->isValueDependent() &&
!Idx->getType()->isIntegerType())
return ExprError(Diag(Idx->getLocStart(),
diag::err_typecheck_subscript_not_integer)
<< Idx->getSourceRange());
Comps.push_back(OffsetOfNode(OC.LocStart, Exprs.size(), OC.LocEnd));
Exprs.push_back(Idx);
continue;
}
if (CurrentType->isDependentType()) {
Comps.push_back(OffsetOfNode(OC.LocStart, OC.U.IdentInfo, OC.LocEnd));
CurrentType = Context.DependentTy;
continue;
}
if (RequireCompleteType(OC.LocStart, CurrentType,
diag::err_offsetof_incomplete_type))
return ExprError();
const RecordType *RC = CurrentType->getAs<RecordType>();
if (!RC)
return ExprError(Diag(OC.LocEnd, diag::err_offsetof_record_type)
<< CurrentType);
RecordDecl *RD = RC->getDecl();
if (CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
bool IsSafe = LangOpts.CPlusPlus0x? CRD->isStandardLayout() : CRD->isPOD();
unsigned DiagID =
LangOpts.CPlusPlus0x? diag::warn_offsetof_non_standardlayout_type
: diag::warn_offsetof_non_pod_type;
if (!IsSafe && !DidWarnAboutNonPOD &&
DiagRuntimeBehavior(BuiltinLoc, 0,
PDiag(DiagID)
<< SourceRange(CompPtr[0].LocStart, OC.LocEnd)
<< CurrentType))
DidWarnAboutNonPOD = true;
}
LookupResult R(*this, OC.U.IdentInfo, OC.LocStart, LookupMemberName);
LookupQualifiedName(R, RD);
FieldDecl *MemberDecl = R.getAsSingle<FieldDecl>();
IndirectFieldDecl *IndirectMemberDecl = 0;
if (!MemberDecl) {
if ((IndirectMemberDecl = R.getAsSingle<IndirectFieldDecl>()))
MemberDecl = IndirectMemberDecl->getAnonField();
}
if (!MemberDecl)
return ExprError(Diag(BuiltinLoc, diag::err_no_member)
<< OC.U.IdentInfo << RD << SourceRange(OC.LocStart,
OC.LocEnd));
if (MemberDecl->isBitField()) {
Diag(OC.LocEnd, diag::err_offsetof_bitfield)
<< MemberDecl->getDeclName()
<< SourceRange(BuiltinLoc, RParenLoc);
Diag(MemberDecl->getLocation(), diag::note_bitfield_decl);
return ExprError();
}
RecordDecl *Parent = MemberDecl->getParent();
if (IndirectMemberDecl)
Parent = cast<RecordDecl>(IndirectMemberDecl->getDeclContext());
CXXBasePaths Paths(true, true,
false);
if (IsDerivedFrom(CurrentType, Context.getTypeDeclType(Parent), Paths)) {
CXXBasePath &Path = Paths.front();
for (CXXBasePath::iterator B = Path.begin(), BEnd = Path.end();
B != BEnd; ++B)
Comps.push_back(OffsetOfNode(B->Base));
}
if (IndirectMemberDecl) {
for (IndirectFieldDecl::chain_iterator FI =
IndirectMemberDecl->chain_begin(),
FEnd = IndirectMemberDecl->chain_end(); FI != FEnd; FI++) {
assert(isa<FieldDecl>(*FI));
Comps.push_back(OffsetOfNode(OC.LocStart,
cast<FieldDecl>(*FI), OC.LocEnd));
}
} else
Comps.push_back(OffsetOfNode(OC.LocStart, MemberDecl, OC.LocEnd));
CurrentType = MemberDecl->getType().getNonReferenceType();
}
return Owned(OffsetOfExpr::Create(Context, Context.getSizeType(), BuiltinLoc,
TInfo, Comps, Exprs, RParenLoc));
}
ExprResult Sema::ActOnBuiltinOffsetOf(Scope *S,
SourceLocation BuiltinLoc,
SourceLocation TypeLoc,
ParsedType ParsedArgTy,
OffsetOfComponent *CompPtr,
unsigned NumComponents,
SourceLocation RParenLoc) {
TypeSourceInfo *ArgTInfo;
QualType ArgTy = GetTypeFromParser(ParsedArgTy, &ArgTInfo);
if (ArgTy.isNull())
return ExprError();
if (!ArgTInfo)
ArgTInfo = Context.getTrivialTypeSourceInfo(ArgTy, TypeLoc);
return BuildBuiltinOffsetOf(BuiltinLoc, ArgTInfo, CompPtr, NumComponents,
RParenLoc);
}
ExprResult Sema::ActOnChooseExpr(SourceLocation BuiltinLoc,
Expr *CondExpr,
Expr *LHSExpr, Expr *RHSExpr,
SourceLocation RPLoc) {
assert((CondExpr && LHSExpr && RHSExpr) && "Missing type argument(s)");
ExprValueKind VK = VK_RValue;
ExprObjectKind OK = OK_Ordinary;
QualType resType;
bool ValueDependent = false;
if (CondExpr->isTypeDependent() || CondExpr->isValueDependent()) {
resType = Context.DependentTy;
ValueDependent = true;
} else {
llvm::APSInt condEval(32);
ExprResult CondICE
= VerifyIntegerConstantExpression(CondExpr, &condEval,
diag::err_typecheck_choose_expr_requires_constant, false);
if (CondICE.isInvalid())
return ExprError();
CondExpr = CondICE.take();
Expr *ActiveExpr = condEval.getZExtValue() ? LHSExpr : RHSExpr;
resType = ActiveExpr->getType();
ValueDependent = ActiveExpr->isValueDependent();
VK = ActiveExpr->getValueKind();
OK = ActiveExpr->getObjectKind();
}
return Owned(new (Context) ChooseExpr(BuiltinLoc, CondExpr, LHSExpr, RHSExpr,
resType, VK, OK, RPLoc,
resType->isDependentType(),
ValueDependent));
}
void Sema::ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope) {
BlockDecl *Block = BlockDecl::Create(Context, CurContext, CaretLoc);
PushBlockScope(CurScope, Block);
CurContext->addDecl(Block);
if (CurScope)
PushDeclContext(CurScope, Block);
else
CurContext = Block;
getCurBlock()->HasImplicitReturnType = true;
PushExpressionEvaluationContext(PotentiallyEvaluated);
}
void Sema::ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo,
Scope *CurScope) {
assert(ParamInfo.getIdentifier()==0 && "block-id should have no identifier!");
assert(ParamInfo.getContext() == Declarator::BlockLiteralContext);
BlockScopeInfo *CurBlock = getCurBlock();
TypeSourceInfo *Sig = GetTypeForDeclarator(ParamInfo, CurScope);
QualType T = Sig->getType();
if (DiagnoseUnexpandedParameterPack(CaretLoc, Sig, UPPC_Block)) {
FunctionProtoType::ExtProtoInfo EPI;
EPI.HasTrailingReturn = false;
EPI.TypeQuals |= DeclSpec::TQ_const;
T = Context.getFunctionType(Context.DependentTy, 0, 0,
EPI);
Sig = Context.getTrivialTypeSourceInfo(T);
}
assert(T->isFunctionType() &&
"GetTypeForDeclarator made a non-function block signature");
FunctionProtoTypeLoc ExplicitSignature;
TypeLoc tmp = Sig->getTypeLoc().IgnoreParens();
if (isa<FunctionProtoTypeLoc>(tmp)) {
ExplicitSignature = cast<FunctionProtoTypeLoc>(tmp);
if (ExplicitSignature.getLocalRangeBegin() ==
ExplicitSignature.getLocalRangeEnd()) {
TypeLoc Result = ExplicitSignature.getResultLoc();
unsigned Size = Result.getFullDataSize();
Sig = Context.CreateTypeSourceInfo(Result.getType(), Size);
Sig->getTypeLoc().initializeFullCopy(Result, Size);
ExplicitSignature = FunctionProtoTypeLoc();
}
}
CurBlock->TheDecl->setSignatureAsWritten(Sig);
CurBlock->FunctionType = T;
const FunctionType *Fn = T->getAs<FunctionType>();
QualType RetTy = Fn->getResultType();
bool isVariadic =
(isa<FunctionProtoType>(Fn) && cast<FunctionProtoType>(Fn)->isVariadic());
CurBlock->TheDecl->setIsVariadic(isVariadic);
if (RetTy->isObjCObjectType()) {
Diag(ParamInfo.getLocStart(),
diag::err_object_cannot_be_passed_returned_by_value) << 0 << RetTy;
return;
}
if (RetTy != Context.DependentTy) {
CurBlock->ReturnType = RetTy;
CurBlock->TheDecl->setBlockMissingReturnType(false);
CurBlock->HasImplicitReturnType = false;
}
SmallVector<ParmVarDecl*, 8> Params;
if (ExplicitSignature) {
for (unsigned I = 0, E = ExplicitSignature.getNumArgs(); I != E; ++I) {
ParmVarDecl *Param = ExplicitSignature.getArg(I);
if (Param->getIdentifier() == 0 &&
!Param->isImplicit() &&
!Param->isInvalidDecl() &&
!getLangOpts().CPlusPlus)
Diag(Param->getLocation(), diag::err_parameter_name_omitted);
Params.push_back(Param);
}
} else if (const FunctionProtoType *Fn = T->getAs<FunctionProtoType>()) {
for (FunctionProtoType::arg_type_iterator
I = Fn->arg_type_begin(), E = Fn->arg_type_end(); I != E; ++I) {
ParmVarDecl *Param =
BuildParmVarDeclForTypedef(CurBlock->TheDecl,
ParamInfo.getLocStart(),
*I);
Params.push_back(Param);
}
}
if (!Params.empty()) {
CurBlock->TheDecl->setParams(Params);
CheckParmsForFunctionDef(CurBlock->TheDecl->param_begin(),
CurBlock->TheDecl->param_end(),
false);
}
ProcessDeclAttributes(CurScope, CurBlock->TheDecl, ParamInfo);
if (Params.empty())
return;
for (BlockDecl::param_iterator AI = CurBlock->TheDecl->param_begin(),
E = CurBlock->TheDecl->param_end(); AI != E; ++AI) {
(*AI)->setOwningFunction(CurBlock->TheDecl);
if ((*AI)->getIdentifier()) {
CheckShadow(CurBlock->TheScope, *AI);
PushOnScopeChains(*AI, CurBlock->TheScope);
}
}
}
void Sema::ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope) {
DiscardCleanupsInEvaluationContext();
PopExpressionEvaluationContext();
PopDeclContext();
PopFunctionScopeInfo();
}
ExprResult Sema::ActOnBlockStmtExpr(SourceLocation CaretLoc,
Stmt *Body, Scope *CurScope) {
if (!LangOpts.Blocks)
Diag(CaretLoc, diag::err_blocks_disable);
if (hasAnyUnrecoverableErrorsInThisFunction())
DiscardCleanupsInEvaluationContext();
assert(!ExprNeedsCleanups && "cleanups within block not correctly bound!");
PopExpressionEvaluationContext();
BlockScopeInfo *BSI = cast<BlockScopeInfo>(FunctionScopes.back());
if (BSI->HasImplicitReturnType)
deduceClosureReturnType(*BSI);
PopDeclContext();
QualType RetTy = Context.VoidTy;
if (!BSI->ReturnType.isNull())
RetTy = BSI->ReturnType;
bool NoReturn = BSI->TheDecl->getAttr<NoReturnAttr>();
QualType BlockTy;
SmallVector<BlockDecl::Capture, 4> Captures;
for (unsigned i = 0, e = BSI->Captures.size(); i != e; i++) {
CapturingScopeInfo::Capture &Cap = BSI->Captures[i];
if (Cap.isThisCapture())
continue;
BlockDecl::Capture NewCap(Cap.getVariable(), Cap.isBlockCapture(),
Cap.isNested(), Cap.getCopyExpr());
Captures.push_back(NewCap);
}
BSI->TheDecl->setCaptures(Context, Captures.begin(), Captures.end(),
BSI->CXXThisCaptureIndex != 0);
if (!BSI->FunctionType.isNull()) {
const FunctionType *FTy = BSI->FunctionType->getAs<FunctionType>();
FunctionType::ExtInfo Ext = FTy->getExtInfo();
if (NoReturn && !Ext.getNoReturn()) Ext = Ext.withNoReturn(true);
if (isa<FunctionNoProtoType>(FTy)) {
FunctionProtoType::ExtProtoInfo EPI;
EPI.ExtInfo = Ext;
BlockTy = Context.getFunctionType(RetTy, 0, 0, EPI);
} else if (FTy->getResultType() == RetTy &&
(!NoReturn || FTy->getNoReturnAttr())) {
BlockTy = BSI->FunctionType;
} else {
const FunctionProtoType *FPT = cast<FunctionProtoType>(FTy);
FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo();
EPI.TypeQuals = 0; EPI.ExtInfo = Ext;
BlockTy = Context.getFunctionType(RetTy,
FPT->arg_type_begin(),
FPT->getNumArgs(),
EPI);
}
} else {
FunctionProtoType::ExtProtoInfo EPI;
EPI.ExtInfo = FunctionType::ExtInfo().withNoReturn(NoReturn);
BlockTy = Context.getFunctionType(RetTy, 0, 0, EPI);
}
DiagnoseUnusedParameters(BSI->TheDecl->param_begin(),
BSI->TheDecl->param_end());
BlockTy = Context.getBlockPointerType(BlockTy);
if (getCurFunction()->NeedsScopeChecking() &&
!hasAnyUnrecoverableErrorsInThisFunction() &&
!PP.isCodeCompletionEnabled())
DiagnoseInvalidJumps(cast<CompoundStmt>(Body));
BSI->TheDecl->setBody(cast<CompoundStmt>(Body));
if (getLangOpts().CPlusPlus && RetTy->isRecordType() &&
!BSI->TheDecl->isDependentContext())
computeNRVO(Body, getCurBlock());
BlockExpr *Result = new (Context) BlockExpr(BSI->TheDecl, BlockTy);
const AnalysisBasedWarnings::Policy &WP = AnalysisWarnings.getDefaultPolicy();
PopFunctionScopeInfo(&WP, Result->getBlockDecl(), Result);
if (Result->getBlockDecl()->hasCaptures()) {
ExprCleanupObjects.push_back(Result->getBlockDecl());
ExprNeedsCleanups = true;
for (BlockDecl::capture_const_iterator
ci = Result->getBlockDecl()->capture_begin(),
ce = Result->getBlockDecl()->capture_end(); ci != ce; ++ci) {
const VarDecl *var = ci->getVariable();
if (var->getType().isDestructedType() != QualType::DK_none) {
getCurFunction()->setHasBranchProtectedScope();
break;
}
}
}
return Owned(Result);
}
ExprResult Sema::ActOnVAArg(SourceLocation BuiltinLoc,
Expr *E, ParsedType Ty,
SourceLocation RPLoc) {
TypeSourceInfo *TInfo;
GetTypeFromParser(Ty, &TInfo);
return BuildVAArgExpr(BuiltinLoc, E, TInfo, RPLoc);
}
ExprResult Sema::BuildVAArgExpr(SourceLocation BuiltinLoc,
Expr *E, TypeSourceInfo *TInfo,
SourceLocation RPLoc) {
Expr *OrigExpr = E;
QualType VaListType = Context.getBuiltinVaListType();
if (VaListType->isArrayType()) {
VaListType = Context.getArrayDecayedType(VaListType);
ExprResult Result = UsualUnaryConversions(E);
if (Result.isInvalid())
return ExprError();
E = Result.take();
} else {
if (!E->isTypeDependent() &&
CheckForModifiableLvalue(E, BuiltinLoc, *this))
return ExprError();
}
if (!E->isTypeDependent() &&
!Context.hasSameType(VaListType, E->getType())) {
return ExprError(Diag(E->getLocStart(),
diag::err_first_argument_to_va_arg_not_of_type_va_list)
<< OrigExpr->getType() << E->getSourceRange());
}
if (!TInfo->getType()->isDependentType()) {
if (RequireCompleteType(TInfo->getTypeLoc().getBeginLoc(), TInfo->getType(),
diag::err_second_parameter_to_va_arg_incomplete,
TInfo->getTypeLoc()))
return ExprError();
if (RequireNonAbstractType(TInfo->getTypeLoc().getBeginLoc(),
TInfo->getType(),
diag::err_second_parameter_to_va_arg_abstract,
TInfo->getTypeLoc()))
return ExprError();
if (!TInfo->getType().isPODType(Context)) {
Diag(TInfo->getTypeLoc().getBeginLoc(),
TInfo->getType()->isObjCLifetimeType()
? diag::warn_second_parameter_to_va_arg_ownership_qualified
: diag::warn_second_parameter_to_va_arg_not_pod)
<< TInfo->getType()
<< TInfo->getTypeLoc().getSourceRange();
}
QualType PromoteType;
if (TInfo->getType()->isPromotableIntegerType()) {
PromoteType = Context.getPromotedIntegerType(TInfo->getType());
if (Context.typesAreCompatible(PromoteType, TInfo->getType()))
PromoteType = QualType();
}
if (TInfo->getType()->isSpecificBuiltinType(BuiltinType::Float))
PromoteType = Context.DoubleTy;
if (!PromoteType.isNull())
Diag(TInfo->getTypeLoc().getBeginLoc(),
diag::warn_second_parameter_to_va_arg_never_compatible)
<< TInfo->getType()
<< PromoteType
<< TInfo->getTypeLoc().getSourceRange();
}
QualType T = TInfo->getType().getNonLValueExprType(Context);
return Owned(new (Context) VAArgExpr(BuiltinLoc, E, TInfo, RPLoc, T));
}
ExprResult Sema::ActOnGNUNullExpr(SourceLocation TokenLoc) {
QualType Ty;
unsigned pw = Context.getTargetInfo().getPointerWidth(0);
if (pw == Context.getTargetInfo().getIntWidth())
Ty = Context.IntTy;
else if (pw == Context.getTargetInfo().getLongWidth())
Ty = Context.LongTy;
else if (pw == Context.getTargetInfo().getLongLongWidth())
Ty = Context.LongLongTy;
else {
llvm_unreachable("I don't know size of pointer!");
}
return Owned(new (Context) GNUNullExpr(Ty, TokenLoc));
}
static void MakeObjCStringLiteralFixItHint(Sema& SemaRef, QualType DstType,
Expr *SrcExpr, FixItHint &Hint) {
if (!SemaRef.getLangOpts().ObjC1)
return;
const ObjCObjectPointerType *PT = DstType->getAs<ObjCObjectPointerType>();
if (!PT)
return;
if (!PT->isObjCIdType()) {
const ObjCInterfaceDecl *ID = PT->getInterfaceDecl();
if (!ID || !ID->getIdentifier()->isStr("NSString"))
return;
}
SrcExpr = SrcExpr->IgnoreParenImpCasts();
if (OpaqueValueExpr *OV = dyn_cast<OpaqueValueExpr>(SrcExpr))
if (OV->getSourceExpr())
SrcExpr = OV->getSourceExpr()->IgnoreParenImpCasts();
StringLiteral *SL = dyn_cast<StringLiteral>(SrcExpr);
if (!SL || !SL->isAscii())
return;
Hint = FixItHint::CreateInsertion(SL->getLocStart(), "@");
}
bool Sema::DiagnoseAssignmentResult(AssignConvertType ConvTy,
SourceLocation Loc,
QualType DstType, QualType SrcType,
Expr *SrcExpr, AssignmentAction Action,
bool *Complained) {
if (Complained)
*Complained = false;
bool CheckInferredResultType = false;
bool isInvalid = false;
unsigned DiagKind = 0;
FixItHint Hint;
ConversionFixItGenerator ConvHints;
bool MayHaveConvFixit = false;
bool MayHaveFunctionDiff = false;
switch (ConvTy) {
case Compatible:
DiagnoseAssignmentEnum(DstType, SrcType, SrcExpr);
return false;
case PointerToInt:
DiagKind = diag::ext_typecheck_convert_pointer_int;
ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this);
MayHaveConvFixit = true;
break;
case IntToPointer:
DiagKind = diag::ext_typecheck_convert_int_pointer;
ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this);
MayHaveConvFixit = true;
break;
case IncompatiblePointer:
MakeObjCStringLiteralFixItHint(*this, DstType, SrcExpr, Hint);
DiagKind = diag::ext_typecheck_convert_incompatible_pointer;
CheckInferredResultType = DstType->isObjCObjectPointerType() &&
SrcType->isObjCObjectPointerType();
if (Hint.isNull() && !CheckInferredResultType) {
ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this);
}
MayHaveConvFixit = true;
break;
case IncompatiblePointerSign:
DiagKind = diag::ext_typecheck_convert_incompatible_pointer_sign;
break;
case FunctionVoidPointer:
DiagKind = diag::ext_typecheck_convert_pointer_void_func;
break;
case IncompatiblePointerDiscardsQualifiers: {
if (SrcType->isArrayType()) SrcType = Context.getArrayDecayedType(SrcType);
Qualifiers lhq = SrcType->getPointeeType().getQualifiers();
Qualifiers rhq = DstType->getPointeeType().getQualifiers();
if (lhq.getAddressSpace() != rhq.getAddressSpace()) {
DiagKind = diag::err_typecheck_incompatible_address_space;
break;
} else if (lhq.getObjCLifetime() != rhq.getObjCLifetime()) {
DiagKind = diag::err_typecheck_incompatible_ownership;
break;
}
llvm_unreachable("unknown error case for discarding qualifiers!");
}
case CompatiblePointerDiscardsQualifiers:
if (getLangOpts().CPlusPlus &&
IsStringLiteralToNonConstPointerConversion(SrcExpr, DstType))
return false;
DiagKind = diag::ext_typecheck_convert_discards_qualifiers;
break;
case IncompatibleNestedPointerQualifiers:
DiagKind = diag::ext_nested_pointer_qualifier_mismatch;
break;
case IntToBlockPointer:
DiagKind = diag::err_int_to_block_pointer;
break;
case IncompatibleBlockPointer:
DiagKind = diag::err_typecheck_convert_incompatible_block_pointer;
break;
case IncompatibleObjCQualifiedId:
DiagKind = diag::warn_incompatible_qualified_id;
break;
case IncompatibleVectors:
DiagKind = diag::warn_incompatible_vectors;
break;
case IncompatibleObjCWeakRef:
DiagKind = diag::err_arc_weak_unavailable_assign;
break;
case Incompatible:
DiagKind = diag::err_typecheck_convert_incompatible;
ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this);
MayHaveConvFixit = true;
isInvalid = true;
MayHaveFunctionDiff = true;
break;
}
QualType FirstType, SecondType;
switch (Action) {
case AA_Assigning:
case AA_Initializing:
FirstType = DstType;
SecondType = SrcType;
break;
case AA_Returning:
case AA_Passing:
case AA_Converting:
case AA_Sending:
case AA_Casting:
FirstType = SrcType;
SecondType = DstType;
break;
}
PartialDiagnostic FDiag = PDiag(DiagKind);
FDiag << FirstType << SecondType << Action << SrcExpr->getSourceRange();
assert(ConvHints.isNull() || Hint.isNull());
if (!ConvHints.isNull()) {
for (std::vector<FixItHint>::iterator HI = ConvHints.Hints.begin(),
HE = ConvHints.Hints.end(); HI != HE; ++HI)
FDiag << *HI;
} else {
FDiag << Hint;
}
if (MayHaveConvFixit) { FDiag << (unsigned) (ConvHints.Kind); }
if (MayHaveFunctionDiff)
HandleFunctionTypeMismatch(FDiag, SecondType, FirstType);
Diag(Loc, FDiag);
if (SecondType == Context.OverloadTy)
NoteAllOverloadCandidates(OverloadExpr::find(SrcExpr).Expression,
FirstType);
if (CheckInferredResultType)
EmitRelatedResultTypeNote(SrcExpr);
if (Complained)
*Complained = true;
return isInvalid;
}
ExprResult Sema::VerifyIntegerConstantExpression(Expr *E,
llvm::APSInt *Result) {
class SimpleICEDiagnoser : public VerifyICEDiagnoser {
public:
virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) {
S.Diag(Loc, diag::err_expr_not_ice) << S.LangOpts.CPlusPlus << SR;
}
} Diagnoser;
return VerifyIntegerConstantExpression(E, Result, Diagnoser);
}
ExprResult Sema::VerifyIntegerConstantExpression(Expr *E,
llvm::APSInt *Result,
unsigned DiagID,
bool AllowFold) {
class IDDiagnoser : public VerifyICEDiagnoser {
unsigned DiagID;
public:
IDDiagnoser(unsigned DiagID)
: VerifyICEDiagnoser(DiagID == 0), DiagID(DiagID) { }
virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) {
S.Diag(Loc, DiagID) << SR;
}
} Diagnoser(DiagID);
return VerifyIntegerConstantExpression(E, Result, Diagnoser, AllowFold);
}
void Sema::VerifyICEDiagnoser::diagnoseFold(Sema &S, SourceLocation Loc,
SourceRange SR) {
S.Diag(Loc, diag::ext_expr_not_ice) << SR << S.LangOpts.CPlusPlus;
}
ExprResult
Sema::VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
VerifyICEDiagnoser &Diagnoser,
bool AllowFold) {
SourceLocation DiagLoc = E->getLocStart();
if (getLangOpts().CPlusPlus0x) {
ExprResult Converted;
if (!Diagnoser.Suppress) {
class CXX11ConvertDiagnoser : public ICEConvertDiagnoser {
public:
CXX11ConvertDiagnoser() : ICEConvertDiagnoser(false, true) { }
virtual DiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc,
QualType T) {
return S.Diag(Loc, diag::err_ice_not_integral) << T;
}
virtual DiagnosticBuilder diagnoseIncomplete(Sema &S,
SourceLocation Loc,
QualType T) {
return S.Diag(Loc, diag::err_ice_incomplete_type) << T;
}
virtual DiagnosticBuilder diagnoseExplicitConv(Sema &S,
SourceLocation Loc,
QualType T,
QualType ConvTy) {
return S.Diag(Loc, diag::err_ice_explicit_conversion) << T << ConvTy;
}
virtual DiagnosticBuilder noteExplicitConv(Sema &S,
CXXConversionDecl *Conv,
QualType ConvTy) {
return S.Diag(Conv->getLocation(), diag::note_ice_conversion_here)
<< ConvTy->isEnumeralType() << ConvTy;
}
virtual DiagnosticBuilder diagnoseAmbiguous(Sema &S, SourceLocation Loc,
QualType T) {
return S.Diag(Loc, diag::err_ice_ambiguous_conversion) << T;
}
virtual DiagnosticBuilder noteAmbiguous(Sema &S,
CXXConversionDecl *Conv,
QualType ConvTy) {
return S.Diag(Conv->getLocation(), diag::note_ice_conversion_here)
<< ConvTy->isEnumeralType() << ConvTy;
}
virtual DiagnosticBuilder diagnoseConversion(Sema &S,
SourceLocation Loc,
QualType T,
QualType ConvTy) {
return DiagnosticBuilder::getEmpty();
}
} ConvertDiagnoser;
Converted = ConvertToIntegralOrEnumerationType(DiagLoc, E,
ConvertDiagnoser,
false);
} else {
class SilentICEConvertDiagnoser : public ICEConvertDiagnoser {
public:
SilentICEConvertDiagnoser() : ICEConvertDiagnoser(true, true) { }
virtual DiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc,
QualType T) {
return DiagnosticBuilder::getEmpty();
}
virtual DiagnosticBuilder diagnoseIncomplete(Sema &S,
SourceLocation Loc,
QualType T) {
return DiagnosticBuilder::getEmpty();
}
virtual DiagnosticBuilder diagnoseExplicitConv(Sema &S,
SourceLocation Loc,
QualType T,
QualType ConvTy) {
return DiagnosticBuilder::getEmpty();
}
virtual DiagnosticBuilder noteExplicitConv(Sema &S,
CXXConversionDecl *Conv,
QualType ConvTy) {
return DiagnosticBuilder::getEmpty();
}
virtual DiagnosticBuilder diagnoseAmbiguous(Sema &S, SourceLocation Loc,
QualType T) {
return DiagnosticBuilder::getEmpty();
}
virtual DiagnosticBuilder noteAmbiguous(Sema &S,
CXXConversionDecl *Conv,
QualType ConvTy) {
return DiagnosticBuilder::getEmpty();
}
virtual DiagnosticBuilder diagnoseConversion(Sema &S,
SourceLocation Loc,
QualType T,
QualType ConvTy) {
return DiagnosticBuilder::getEmpty();
}
} ConvertDiagnoser;
Converted = ConvertToIntegralOrEnumerationType(DiagLoc, E,
ConvertDiagnoser, false);
}
if (Converted.isInvalid())
return Converted;
E = Converted.take();
if (!E->getType()->isIntegralOrUnscopedEnumerationType())
return ExprError();
} else if (!E->getType()->isIntegralOrUnscopedEnumerationType()) {
if (!Diagnoser.Suppress)
Diagnoser.diagnoseNotICE(*this, DiagLoc, E->getSourceRange());
return ExprError();
}
if (!getLangOpts().CPlusPlus0x && E->isIntegerConstantExpr(Context)) {
if (Result)
*Result = E->EvaluateKnownConstInt(Context);
return Owned(E);
}
Expr::EvalResult EvalResult;
llvm::SmallVector<PartialDiagnosticAt, 8> Notes;
EvalResult.Diag = &Notes;
bool Folded = E->EvaluateAsRValue(EvalResult, Context) &&
EvalResult.Val.isInt() && !EvalResult.HasSideEffects;
if (Folded && getLangOpts().CPlusPlus0x && Notes.empty()) {
if (Result)
*Result = EvalResult.Val.getInt();
return Owned(E);
}
if (Notes.size() == 1 && Notes[0].second.getDiagID() ==
diag::note_invalid_subexpr_in_const_expr) {
DiagLoc = Notes[0].first;
Notes.clear();
}
if (!Folded || !AllowFold) {
if (!Diagnoser.Suppress) {
Diagnoser.diagnoseNotICE(*this, DiagLoc, E->getSourceRange());
for (unsigned I = 0, N = Notes.size(); I != N; ++I)
Diag(Notes[I].first, Notes[I].second);
}
return ExprError();
}
Diagnoser.diagnoseFold(*this, DiagLoc, E->getSourceRange());
for (unsigned I = 0, N = Notes.size(); I != N; ++I)
Diag(Notes[I].first, Notes[I].second);
if (Result)
*Result = EvalResult.Val.getInt();
return Owned(E);
}
namespace {
class TransformToPE : public TreeTransform<TransformToPE> {
typedef TreeTransform<TransformToPE> BaseTransform;
public:
TransformToPE(Sema &SemaRef) : BaseTransform(SemaRef) { }
bool AlwaysRebuild() { return true; }
StmtResult TransformLabelStmt(LabelStmt *S) {
S->getDecl()->setStmt(0);
return BaseTransform::TransformLabelStmt(S);
}
ExprResult TransformDeclRefExpr(DeclRefExpr *E) {
if (isa<FieldDecl>(E->getDecl()) &&
!SemaRef.isUnevaluatedContext())
return SemaRef.Diag(E->getLocation(),
diag::err_invalid_non_static_member_use)
<< E->getDecl() << E->getSourceRange();
return BaseTransform::TransformDeclRefExpr(E);
}
ExprResult TransformUnaryOperator(UnaryOperator *E) {
if (E->getOpcode() == UO_AddrOf && E->getType()->isMemberPointerType())
return E;
return BaseTransform::TransformUnaryOperator(E);
}
ExprResult TransformLambdaExpr(LambdaExpr *E) {
return E;
}
};
}
ExprResult Sema::TranformToPotentiallyEvaluated(Expr *E) {
assert(ExprEvalContexts.back().Context == Unevaluated &&
"Should only transform unevaluated expressions");
ExprEvalContexts.back().Context =
ExprEvalContexts[ExprEvalContexts.size()-2].Context;
if (ExprEvalContexts.back().Context == Unevaluated)
return E;
return TransformToPE(*this).TransformExpr(E);
}
void
Sema::PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
Decl *LambdaContextDecl,
bool IsDecltype) {
ExprEvalContexts.push_back(
ExpressionEvaluationContextRecord(NewContext,
ExprCleanupObjects.size(),
ExprNeedsCleanups,
LambdaContextDecl,
IsDecltype));
ExprNeedsCleanups = false;
if (!MaybeODRUseExprs.empty())
std::swap(MaybeODRUseExprs, ExprEvalContexts.back().SavedMaybeODRUseExprs);
}
void
Sema::PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
ReuseLambdaContextDecl_t,
bool IsDecltype) {
Decl *LambdaContextDecl = ExprEvalContexts.back().LambdaContextDecl;
PushExpressionEvaluationContext(NewContext, LambdaContextDecl, IsDecltype);
}
void Sema::PopExpressionEvaluationContext() {
ExpressionEvaluationContextRecord& Rec = ExprEvalContexts.back();
if (!Rec.Lambdas.empty()) {
if (Rec.Context == Unevaluated) {
for (unsigned I = 0, N = Rec.Lambdas.size(); I != N; ++I)
Diag(Rec.Lambdas[I]->getLocStart(),
diag::err_lambda_unevaluated_operand);
} else {
for (unsigned I = 0, N = Rec.Lambdas.size(); I != N; ++I) {
LambdaExpr *Lambda = Rec.Lambdas[I];
for (LambdaExpr::capture_init_iterator
C = Lambda->capture_init_begin(),
CEnd = Lambda->capture_init_end();
C != CEnd; ++C) {
MarkDeclarationsReferencedInExpr(*C);
}
}
}
}
if (Rec.Context == Unevaluated || Rec.Context == ConstantEvaluated) {
ExprCleanupObjects.erase(ExprCleanupObjects.begin() + Rec.NumCleanupObjects,
ExprCleanupObjects.end());
ExprNeedsCleanups = Rec.ParentNeedsCleanups;
CleanupVarDeclMarking();
std::swap(MaybeODRUseExprs, Rec.SavedMaybeODRUseExprs);
} else {
ExprNeedsCleanups |= Rec.ParentNeedsCleanups;
MaybeODRUseExprs.insert(Rec.SavedMaybeODRUseExprs.begin(),
Rec.SavedMaybeODRUseExprs.end());
}
ExprEvalContexts.pop_back();
}
void Sema::DiscardCleanupsInEvaluationContext() {
ExprCleanupObjects.erase(
ExprCleanupObjects.begin() + ExprEvalContexts.back().NumCleanupObjects,
ExprCleanupObjects.end());
ExprNeedsCleanups = false;
MaybeODRUseExprs.clear();
}
ExprResult Sema::HandleExprEvaluationContextForTypeof(Expr *E) {
if (!E->getType()->isVariablyModifiedType())
return E;
return TranformToPotentiallyEvaluated(E);
}
static bool IsPotentiallyEvaluatedContext(Sema &SemaRef) {
if (SemaRef.CurContext->isDependentContext())
return false;
switch (SemaRef.ExprEvalContexts.back().Context) {
case Sema::Unevaluated:
return false;
case Sema::ConstantEvaluated:
case Sema::PotentiallyEvaluated:
return true;
case Sema::PotentiallyEvaluatedIfUsed:
return false;
}
llvm_unreachable("Invalid context");
}
void Sema::MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func) {
assert(Func && "No function?");
Func->setReferenced();
if (Func->isUsed(false) &&
!(Func->isConstexpr() && !Func->getBody() &&
Func->isImplicitlyInstantiable()))
return;
if (!IsPotentiallyEvaluatedContext(*this))
return;
if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Func)) {
if (Constructor->isDefaulted() && !Constructor->isDeleted()) {
if (Constructor->isDefaultConstructor()) {
if (Constructor->isTrivial())
return;
if (!Constructor->isUsed(false))
DefineImplicitDefaultConstructor(Loc, Constructor);
} else if (Constructor->isCopyConstructor()) {
if (!Constructor->isUsed(false))
DefineImplicitCopyConstructor(Loc, Constructor);
} else if (Constructor->isMoveConstructor()) {
if (!Constructor->isUsed(false))
DefineImplicitMoveConstructor(Loc, Constructor);
}
}
MarkVTableUsed(Loc, Constructor->getParent());
} else if (CXXDestructorDecl *Destructor =
dyn_cast<CXXDestructorDecl>(Func)) {
if (Destructor->isDefaulted() && !Destructor->isDeleted() &&
!Destructor->isUsed(false))
DefineImplicitDestructor(Loc, Destructor);
if (Destructor->isVirtual())
MarkVTableUsed(Loc, Destructor->getParent());
} else if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(Func)) {
if (MethodDecl->isDefaulted() && !MethodDecl->isDeleted() &&
MethodDecl->isOverloadedOperator() &&
MethodDecl->getOverloadedOperator() == OO_Equal) {
if (!MethodDecl->isUsed(false)) {
if (MethodDecl->isCopyAssignmentOperator())
DefineImplicitCopyAssignment(Loc, MethodDecl);
else
DefineImplicitMoveAssignment(Loc, MethodDecl);
}
} else if (isa<CXXConversionDecl>(MethodDecl) &&
MethodDecl->getParent()->isLambda()) {
CXXConversionDecl *Conversion = cast<CXXConversionDecl>(MethodDecl);
if (Conversion->isLambdaToBlockPointerConversion())
DefineImplicitLambdaToBlockPointerConversion(Loc, Conversion);
else
DefineImplicitLambdaToFunctionPointerConversion(Loc, Conversion);
} else if (MethodDecl->isVirtual())
MarkVTableUsed(Loc, MethodDecl->getParent());
}
if (CurContext == Func) return;
const FunctionProtoType *FPT = Func->getType()->getAs<FunctionProtoType>();
if (FPT && isUnresolvedExceptionSpec(FPT->getExceptionSpecType()))
ResolveExceptionSpec(Loc, FPT);
if (Func->isImplicitlyInstantiable()) {
bool AlreadyInstantiated = false;
SourceLocation PointOfInstantiation = Loc;
if (FunctionTemplateSpecializationInfo *SpecInfo
= Func->getTemplateSpecializationInfo()) {
if (SpecInfo->getPointOfInstantiation().isInvalid())
SpecInfo->setPointOfInstantiation(Loc);
else if (SpecInfo->getTemplateSpecializationKind()
== TSK_ImplicitInstantiation) {
AlreadyInstantiated = true;
PointOfInstantiation = SpecInfo->getPointOfInstantiation();
}
} else if (MemberSpecializationInfo *MSInfo
= Func->getMemberSpecializationInfo()) {
if (MSInfo->getPointOfInstantiation().isInvalid())
MSInfo->setPointOfInstantiation(Loc);
else if (MSInfo->getTemplateSpecializationKind()
== TSK_ImplicitInstantiation) {
AlreadyInstantiated = true;
PointOfInstantiation = MSInfo->getPointOfInstantiation();
}
}
if (!AlreadyInstantiated || Func->isConstexpr()) {
if (isa<CXXRecordDecl>(Func->getDeclContext()) &&
cast<CXXRecordDecl>(Func->getDeclContext())->isLocalClass())
PendingLocalImplicitInstantiations.push_back(
std::make_pair(Func, PointOfInstantiation));
else if (Func->isConstexpr())
InstantiateFunctionDefinition(PointOfInstantiation, Func);
else {
PendingInstantiations.push_back(std::make_pair(Func,
PointOfInstantiation));
Consumer.HandleCXXImplicitFunctionInstantiation(Func);
}
}
} else {
for (FunctionDecl::redecl_iterator i(Func->redecls_begin()),
e(Func->redecls_end()); i != e; ++i) {
if (!i->isUsed(false) && i->isImplicitlyInstantiable())
MarkFunctionReferenced(Loc, *i);
}
}
if (!Func->isPure() && !Func->hasBody() &&
Func->getLinkage() != ExternalLinkage) {
SourceLocation &old = UndefinedInternals[Func->getCanonicalDecl()];
if (old.isInvalid()) old = Loc;
}
Func->setUsed(true);
}
static void
diagnoseUncapturableValueReference(Sema &S, SourceLocation loc,
VarDecl *var, DeclContext *DC) {
DeclContext *VarDC = var->getDeclContext();
if (isa<ParmVarDecl>(var) &&
isa<TranslationUnitDecl>(VarDC))
return;
if (!S.getLangOpts().CPlusPlus && !S.CurContext->isFunctionOrMethod())
return;
if (isa<CXXMethodDecl>(VarDC) &&
cast<CXXRecordDecl>(VarDC->getParent())->isLambda()) {
S.Diag(loc, diag::err_reference_to_local_var_in_enclosing_lambda)
<< var->getIdentifier();
} else if (FunctionDecl *fn = dyn_cast<FunctionDecl>(VarDC)) {
S.Diag(loc, diag::err_reference_to_local_var_in_enclosing_function)
<< var->getIdentifier() << fn->getDeclName();
} else if (isa<BlockDecl>(VarDC)) {
S.Diag(loc, diag::err_reference_to_local_var_in_enclosing_block)
<< var->getIdentifier();
} else {
S.Diag(loc, diag::err_reference_to_local_var_in_enclosing_context)
<< var->getIdentifier();
}
S.Diag(var->getLocation(), diag::note_local_variable_declared_here)
<< var->getIdentifier();
}
static ExprResult captureInLambda(Sema &S, LambdaScopeInfo *LSI,
VarDecl *Var, QualType FieldType,
QualType DeclRefType,
SourceLocation Loc,
bool RefersToEnclosingLocal) {
CXXRecordDecl *Lambda = LSI->Lambda;
FieldDecl *Field
= FieldDecl::Create(S.Context, Lambda, Loc, Loc, 0, FieldType,
S.Context.getTrivialTypeSourceInfo(FieldType, Loc),
0, false, ICIS_NoInit);
Field->setImplicit(true);
Field->setAccess(AS_private);
Lambda->addDecl(Field);
S.PushExpressionEvaluationContext(Sema::PotentiallyEvaluated);
Expr *Ref = new (S.Context) DeclRefExpr(Var, RefersToEnclosingLocal,
DeclRefType, VK_LValue, Loc);
Var->setReferenced(true);
Var->setUsed(true);
SmallVector<VarDecl *, 4> IndexVariables;
QualType BaseType = FieldType;
QualType SizeType = S.Context.getSizeType();
LSI->ArrayIndexStarts.push_back(LSI->ArrayIndexVars.size());
while (const ConstantArrayType *Array
= S.Context.getAsConstantArrayType(BaseType)) {
IdentifierInfo *IterationVarName = 0;
{
SmallString<8> Str;
llvm::raw_svector_ostream OS(Str);
OS << "__i" << IndexVariables.size();
IterationVarName = &S.Context.Idents.get(OS.str());
}
VarDecl *IterationVar
= VarDecl::Create(S.Context, S.CurContext, Loc, Loc,
IterationVarName, SizeType,
S.Context.getTrivialTypeSourceInfo(SizeType, Loc),
SC_None, SC_None);
IndexVariables.push_back(IterationVar);
LSI->ArrayIndexVars.push_back(IterationVar);
ExprResult IterationVarRef
= S.BuildDeclRefExpr(IterationVar, SizeType, VK_LValue, Loc);
assert(!IterationVarRef.isInvalid() &&
"Reference to invented variable cannot fail!");
IterationVarRef = S.DefaultLvalueConversion(IterationVarRef.take());
assert(!IterationVarRef.isInvalid() &&
"Conversion of invented variable cannot fail!");
ExprResult Subscript = S.CreateBuiltinArraySubscriptExpr(
Ref, Loc, IterationVarRef.take(), Loc);
if (Subscript.isInvalid()) {
S.CleanupVarDeclMarking();
S.DiscardCleanupsInEvaluationContext();
S.PopExpressionEvaluationContext();
return ExprError();
}
Ref = Subscript.take();
BaseType = Array->getElementType();
}
SmallVector<InitializedEntity, 4> Entities;
Entities.reserve(1 + IndexVariables.size());
Entities.push_back(
InitializedEntity::InitializeLambdaCapture(Var, Field, Loc));
for (unsigned I = 0, N = IndexVariables.size(); I != N; ++I)
Entities.push_back(InitializedEntity::InitializeElement(S.Context,
0,
Entities.back()));
InitializationKind InitKind
= InitializationKind::CreateDirect(Loc, Loc, Loc);
InitializationSequence Init(S, Entities.back(), InitKind, &Ref, 1);
ExprResult Result(true);
if (!Init.Diagnose(S, Entities.back(), InitKind, &Ref, 1))
Result = Init.Perform(S, Entities.back(), InitKind, Ref);
if (S.ExprNeedsCleanups)
LSI->ExprNeedsCleanups = true;
S.CleanupVarDeclMarking();
S.DiscardCleanupsInEvaluationContext();
S.PopExpressionEvaluationContext();
return Result;
}
bool Sema::tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
TryCaptureKind Kind, SourceLocation EllipsisLoc,
bool BuildAndDiagnose,
QualType &CaptureType,
QualType &DeclRefType) {
bool Nested = false;
DeclContext *DC = CurContext;
if (Var->getDeclContext() == DC) return true;
if (!Var->hasLocalStorage()) return true;
bool HasBlocksAttr = Var->hasAttr<BlocksAttr>();
CaptureType = Var->getType();
DeclRefType = CaptureType.getNonReferenceType();
bool Explicit = (Kind != TryCapture_Implicit);
unsigned FunctionScopesIndex = FunctionScopes.size() - 1;
do {
DeclContext *ParentDC;
if (isa<BlockDecl>(DC))
ParentDC = DC->getParent();
else if (isa<CXXMethodDecl>(DC) &&
cast<CXXMethodDecl>(DC)->getOverloadedOperator() == OO_Call &&
cast<CXXRecordDecl>(DC->getParent())->isLambda())
ParentDC = DC->getParent()->getParent();
else {
if (BuildAndDiagnose)
diagnoseUncapturableValueReference(*this, Loc, Var, DC);
return true;
}
CapturingScopeInfo *CSI =
cast<CapturingScopeInfo>(FunctionScopes[FunctionScopesIndex]);
if (CSI->CaptureMap.count(Var)) {
Nested = true;
CaptureType = CSI->getCapture(Var).getCaptureType();
DeclRefType = CaptureType.getNonReferenceType();
const CapturingScopeInfo::Capture &Cap = CSI->getCapture(Var);
if (Cap.isCopyCapture() &&
!(isa<LambdaScopeInfo>(CSI) && cast<LambdaScopeInfo>(CSI)->Mutable))
DeclRefType.addConst();
break;
}
bool IsBlock = isa<BlockScopeInfo>(CSI);
bool IsLambda = !IsBlock;
if (IsLambda && !Var->getDeclName()) {
if (BuildAndDiagnose) {
Diag(Loc, diag::err_lambda_capture_anonymous_var);
Diag(Var->getLocation(), diag::note_declared_at);
}
return true;
}
if (Var->getType()->isVariablyModifiedType()) {
if (BuildAndDiagnose) {
if (IsBlock)
Diag(Loc, diag::err_ref_vm_type);
else
Diag(Loc, diag::err_lambda_capture_vm_type) << Var->getDeclName();
Diag(Var->getLocation(), diag::note_previous_decl)
<< Var->getDeclName();
}
return true;
}
if (IsLambda && HasBlocksAttr) {
if (BuildAndDiagnose) {
Diag(Loc, diag::err_lambda_capture_block)
<< Var->getDeclName();
Diag(Var->getLocation(), diag::note_previous_decl)
<< Var->getDeclName();
}
return true;
}
if (CSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None && !Explicit) {
if (BuildAndDiagnose) {
Diag(Loc, diag::err_lambda_impcap) << Var->getDeclName();
Diag(Var->getLocation(), diag::note_previous_decl)
<< Var->getDeclName();
Diag(cast<LambdaScopeInfo>(CSI)->Lambda->getLocStart(),
diag::note_lambda_decl);
}
return true;
}
FunctionScopesIndex--;
DC = ParentDC;
Explicit = false;
} while (!Var->getDeclContext()->Equals(DC));
for (unsigned I = ++FunctionScopesIndex, N = FunctionScopes.size(); I != N;
++I) {
CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FunctionScopes[I]);
if (isa<BlockScopeInfo>(CSI)) {
Expr *CopyExpr = 0;
bool ByRef = false;
if (CaptureType->isArrayType()) {
if (BuildAndDiagnose) {
Diag(Loc, diag::err_ref_array_type);
Diag(Var->getLocation(), diag::note_previous_decl)
<< Var->getDeclName();
}
return true;
}
if (CaptureType.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) {
if (BuildAndDiagnose) {
Diag(Loc, diag::err_arc_autoreleasing_capture)
<< 0;
Diag(Var->getLocation(), diag::note_previous_decl)
<< Var->getDeclName();
}
return true;
}
if (HasBlocksAttr || CaptureType->isReferenceType()) {
ByRef = true;
} else {
CaptureType = CaptureType.getNonReferenceType().withConst();
DeclRefType = CaptureType;
if (getLangOpts().CPlusPlus && BuildAndDiagnose) {
if (const RecordType *Record = DeclRefType->getAs<RecordType>()) {
if (isa<ParmVarDecl>(Var))
FinalizeVarWithDestructor(Var, Record);
Expr *DeclRef = new (Context) DeclRefExpr(Var, false,
DeclRefType.withConst(),
VK_LValue, Loc);
ExprResult Result
= PerformCopyInitialization(
InitializedEntity::InitializeBlock(Var->getLocation(),
CaptureType, false),
Loc, Owned(DeclRef));
if (!Result.isInvalid() &&
!cast<CXXConstructExpr>(Result.get())->getConstructor()
->isTrivial()) {
Result = MaybeCreateExprWithCleanups(Result);
CopyExpr = Result.take();
}
}
}
}
if (BuildAndDiagnose)
CSI->addCapture(Var, HasBlocksAttr, ByRef, Nested, Loc,
SourceLocation(), CaptureType, CopyExpr);
Nested = true;
continue;
}
LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CSI);
bool ByRef = false;
if (I == N - 1 && Kind != TryCapture_Implicit) {
ByRef = (Kind == TryCapture_ExplicitByRef);
} else {
ByRef = (LSI->ImpCaptureStyle == LambdaScopeInfo::ImpCap_LambdaByref);
}
if (ByRef) {
CaptureType = Context.getLValueReferenceType(DeclRefType);
} else {
if (const ReferenceType *RefType = CaptureType->getAs<ReferenceType>()){
if (!RefType->getPointeeType()->isFunctionType())
CaptureType = RefType->getPointeeType();
}
if (CaptureType.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) {
if (BuildAndDiagnose) {
Diag(Loc, diag::err_arc_autoreleasing_capture) << 1;
Diag(Var->getLocation(), diag::note_previous_decl)
<< Var->getDeclName();
}
return true;
}
}
Expr *CopyExpr = 0;
if (BuildAndDiagnose) {
ExprResult Result = captureInLambda(*this, LSI, Var, CaptureType,
DeclRefType, Loc,
I == N-1);
if (!Result.isInvalid())
CopyExpr = Result.take();
}
if (ByRef)
DeclRefType = CaptureType.getNonReferenceType();
else {
DeclRefType = CaptureType.getNonReferenceType();
if (!LSI->Mutable && !CaptureType->isReferenceType())
DeclRefType.addConst();
}
if (BuildAndDiagnose)
CSI->addCapture(Var, false, ByRef, Nested, Loc,
EllipsisLoc, CaptureType, CopyExpr);
Nested = true;
}
return false;
}
bool Sema::tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
TryCaptureKind Kind, SourceLocation EllipsisLoc) {
QualType CaptureType;
QualType DeclRefType;
return tryCaptureVariable(Var, Loc, Kind, EllipsisLoc,
true, CaptureType,
DeclRefType);
}
QualType Sema::getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc) {
QualType CaptureType;
QualType DeclRefType;
if (tryCaptureVariable(Var, Loc, TryCapture_Implicit, SourceLocation(),
false, CaptureType, DeclRefType))
return QualType();
return DeclRefType;
}
static void MarkVarDeclODRUsed(Sema &SemaRef, VarDecl *Var,
SourceLocation Loc) {
if (Var->hasDefinition(SemaRef.Context) == VarDecl::DeclarationOnly &&
Var->getLinkage() != ExternalLinkage &&
!(Var->isStaticDataMember() && Var->hasInit())) {
SourceLocation &old = SemaRef.UndefinedInternals[Var->getCanonicalDecl()];
if (old.isInvalid()) old = Loc;
}
SemaRef.tryCaptureVariable(Var, Loc);
Var->setUsed(true);
}
void Sema::UpdateMarkingForLValueToRValue(Expr *E) {
MaybeODRUseExprs.erase(E->IgnoreParens());
}
ExprResult Sema::ActOnConstantExpression(ExprResult Res) {
if (!Res.isUsable())
return Res;
UpdateMarkingForLValueToRValue(Res.get());
return Res;
}
void Sema::CleanupVarDeclMarking() {
for (llvm::SmallPtrSetIterator<Expr*> i = MaybeODRUseExprs.begin(),
e = MaybeODRUseExprs.end();
i != e; ++i) {
VarDecl *Var;
SourceLocation Loc;
if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(*i)) {
Var = cast<VarDecl>(DRE->getDecl());
Loc = DRE->getLocation();
} else if (MemberExpr *ME = dyn_cast<MemberExpr>(*i)) {
Var = cast<VarDecl>(ME->getMemberDecl());
Loc = ME->getMemberLoc();
} else {
llvm_unreachable("Unexpcted expression");
}
MarkVarDeclODRUsed(*this, Var, Loc);
}
MaybeODRUseExprs.clear();
}
static void DoMarkVarDeclReferenced(Sema &SemaRef, SourceLocation Loc,
VarDecl *Var, Expr *E) {
Var->setReferenced();
if (!IsPotentiallyEvaluatedContext(SemaRef))
return;
if (Var->isStaticDataMember() && Var->getInstantiatedFromStaticDataMember()) {
MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo();
assert(MSInfo && "Missing member specialization information?");
bool AlreadyInstantiated = !MSInfo->getPointOfInstantiation().isInvalid();
if (MSInfo->getTemplateSpecializationKind() == TSK_ImplicitInstantiation &&
(!AlreadyInstantiated ||
Var->isUsableInConstantExpressions(SemaRef.Context))) {
if (!AlreadyInstantiated) {
if (ASTMutationListener *L = SemaRef.getASTMutationListener())
L->StaticDataMemberInstantiated(Var);
MSInfo->setPointOfInstantiation(Loc);
}
SourceLocation PointOfInstantiation = MSInfo->getPointOfInstantiation();
if (Var->isUsableInConstantExpressions(SemaRef.Context))
SemaRef.InstantiateStaticDataMemberDefinition(PointOfInstantiation,Var);
else
SemaRef.PendingInstantiations.push_back(
std::make_pair(Var, PointOfInstantiation));
}
}
const VarDecl *DefVD;
if (E && !isa<ParmVarDecl>(Var) && !Var->getType()->isReferenceType() &&
Var->isUsableInConstantExpressions(SemaRef.Context) &&
Var->getAnyInitializer(DefVD) && DefVD->checkInitIsICE())
SemaRef.MaybeODRUseExprs.insert(E);
else
MarkVarDeclODRUsed(SemaRef, Var, Loc);
}
void Sema::MarkVariableReferenced(SourceLocation Loc, VarDecl *Var) {
DoMarkVarDeclReferenced(*this, Loc, Var, 0);
}
static void MarkExprReferenced(Sema &SemaRef, SourceLocation Loc,
Decl *D, Expr *E) {
if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
DoMarkVarDeclReferenced(SemaRef, Loc, Var, E);
return;
}
SemaRef.MarkAnyDeclReferenced(Loc, D);
const MemberExpr *ME = dyn_cast<MemberExpr>(E);
if (!ME)
return;
CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ME->getMemberDecl());
if (!MD)
return;
const Expr *Base = ME->getBase();
const CXXRecordDecl *MostDerivedClassDecl = Base->getBestDynamicClassType();
if (!MostDerivedClassDecl)
return;
CXXMethodDecl *DM = MD->getCorrespondingMethodInClass(MostDerivedClassDecl);
if (!DM)
return;
SemaRef.MarkAnyDeclReferenced(Loc, DM);
}
void Sema::MarkDeclRefReferenced(DeclRefExpr *E) {
MarkExprReferenced(*this, E->getLocation(), E->getDecl(), E);
}
void Sema::MarkMemberReferenced(MemberExpr *E) {
MarkExprReferenced(*this, E->getMemberLoc(), E->getMemberDecl(), E);
}
void Sema::MarkAnyDeclReferenced(SourceLocation Loc, Decl *D) {
if (VarDecl *VD = dyn_cast<VarDecl>(D))
MarkVariableReferenced(Loc, VD);
else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
MarkFunctionReferenced(Loc, FD);
else
D->setReferenced();
}
namespace {
class MarkReferencedDecls : public RecursiveASTVisitor<MarkReferencedDecls> {
Sema &S;
SourceLocation Loc;
public:
typedef RecursiveASTVisitor<MarkReferencedDecls> Inherited;
MarkReferencedDecls(Sema &S, SourceLocation Loc) : S(S), Loc(Loc) { }
bool TraverseTemplateArgument(const TemplateArgument &Arg);
bool TraverseRecordType(RecordType *T);
};
}
bool MarkReferencedDecls::TraverseTemplateArgument(
const TemplateArgument &Arg) {
if (Arg.getKind() == TemplateArgument::Declaration) {
if (Decl *D = Arg.getAsDecl())
S.MarkAnyDeclReferenced(Loc, D);
}
return Inherited::TraverseTemplateArgument(Arg);
}
bool MarkReferencedDecls::TraverseRecordType(RecordType *T) {
if (ClassTemplateSpecializationDecl *Spec
= dyn_cast<ClassTemplateSpecializationDecl>(T->getDecl())) {
const TemplateArgumentList &Args = Spec->getTemplateArgs();
return TraverseTemplateArguments(Args.data(), Args.size());
}
return true;
}
void Sema::MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T) {
MarkReferencedDecls Marker(*this, Loc);
Marker.TraverseType(Context.getCanonicalType(T));
}
namespace {
class EvaluatedExprMarker : public EvaluatedExprVisitor<EvaluatedExprMarker> {
Sema &S;
bool SkipLocalVariables;
public:
typedef EvaluatedExprVisitor<EvaluatedExprMarker> Inherited;
EvaluatedExprMarker(Sema &S, bool SkipLocalVariables)
: Inherited(S.Context), S(S), SkipLocalVariables(SkipLocalVariables) { }
void VisitDeclRefExpr(DeclRefExpr *E) {
if (SkipLocalVariables) {
if (VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()))
if (VD->hasLocalStorage())
return;
}
S.MarkDeclRefReferenced(E);
}
void VisitMemberExpr(MemberExpr *E) {
S.MarkMemberReferenced(E);
Inherited::VisitMemberExpr(E);
}
void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
S.MarkFunctionReferenced(E->getLocStart(),
const_cast<CXXDestructorDecl*>(E->getTemporary()->getDestructor()));
Visit(E->getSubExpr());
}
void VisitCXXNewExpr(CXXNewExpr *E) {
if (E->getOperatorNew())
S.MarkFunctionReferenced(E->getLocStart(), E->getOperatorNew());
if (E->getOperatorDelete())
S.MarkFunctionReferenced(E->getLocStart(), E->getOperatorDelete());
Inherited::VisitCXXNewExpr(E);
}
void VisitCXXDeleteExpr(CXXDeleteExpr *E) {
if (E->getOperatorDelete())
S.MarkFunctionReferenced(E->getLocStart(), E->getOperatorDelete());
QualType Destroyed = S.Context.getBaseElementType(E->getDestroyedType());
if (const RecordType *DestroyedRec = Destroyed->getAs<RecordType>()) {
CXXRecordDecl *Record = cast<CXXRecordDecl>(DestroyedRec->getDecl());
S.MarkFunctionReferenced(E->getLocStart(),
S.LookupDestructor(Record));
}
Inherited::VisitCXXDeleteExpr(E);
}
void VisitCXXConstructExpr(CXXConstructExpr *E) {
S.MarkFunctionReferenced(E->getLocStart(), E->getConstructor());
Inherited::VisitCXXConstructExpr(E);
}
void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
Visit(E->getExpr());
}
void VisitImplicitCastExpr(ImplicitCastExpr *E) {
Inherited::VisitImplicitCastExpr(E);
if (E->getCastKind() == CK_LValueToRValue)
S.UpdateMarkingForLValueToRValue(E->getSubExpr());
}
};
}
void Sema::MarkDeclarationsReferencedInExpr(Expr *E,
bool SkipLocalVariables) {
EvaluatedExprMarker(*this, SkipLocalVariables).Visit(E);
}
bool Sema::DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement,
const PartialDiagnostic &PD) {
switch (ExprEvalContexts.back().Context) {
case Unevaluated:
break;
case ConstantEvaluated:
break;
case PotentiallyEvaluated:
case PotentiallyEvaluatedIfUsed:
if (Statement && getCurFunctionOrMethodDecl()) {
FunctionScopes.back()->PossiblyUnreachableDiags.
push_back(sema::PossiblyUnreachableDiag(PD, Loc, Statement));
}
else
Diag(Loc, PD);
return true;
}
return false;
}
bool Sema::CheckCallReturnType(QualType ReturnType, SourceLocation Loc,
CallExpr *CE, FunctionDecl *FD) {
if (ReturnType->isVoidType() || !ReturnType->isIncompleteType())
return false;
if (ExprEvalContexts.back().IsDecltype) {
ExprEvalContexts.back().DelayedDecltypeCalls.push_back(CE);
return false;
}
class CallReturnIncompleteDiagnoser : public TypeDiagnoser {
FunctionDecl *FD;
CallExpr *CE;
public:
CallReturnIncompleteDiagnoser(FunctionDecl *FD, CallExpr *CE)
: FD(FD), CE(CE) { }
virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) {
if (!FD) {
S.Diag(Loc, diag::err_call_incomplete_return)
<< T << CE->getSourceRange();
return;
}
S.Diag(Loc, diag::err_call_function_incomplete_return)
<< CE->getSourceRange() << FD->getDeclName() << T;
S.Diag(FD->getLocation(),
diag::note_function_with_incomplete_return_type_declared_here)
<< FD->getDeclName();
}
} Diagnoser(FD, CE);
if (RequireCompleteType(Loc, ReturnType, Diagnoser))
return true;
return false;
}
void Sema::DiagnoseAssignmentAsCondition(Expr *E) {
SourceLocation Loc;
unsigned diagnostic = diag::warn_condition_is_assignment;
bool IsOrAssign = false;
if (BinaryOperator *Op = dyn_cast<BinaryOperator>(E)) {
if (Op->getOpcode() != BO_Assign && Op->getOpcode() != BO_OrAssign)
return;
IsOrAssign = Op->getOpcode() == BO_OrAssign;
if (ObjCMessageExpr *ME
= dyn_cast<ObjCMessageExpr>(Op->getRHS()->IgnoreParenCasts())) {
Selector Sel = ME->getSelector();
if (isSelfExpr(Op->getLHS()) && Sel.getNameForSlot(0).startswith("init"))
diagnostic = diag::warn_condition_is_idiomatic_assignment;
else if (Sel.isUnarySelector() && Sel.getNameForSlot(0) == "nextObject")
diagnostic = diag::warn_condition_is_idiomatic_assignment;
}
Loc = Op->getOperatorLoc();
} else if (CXXOperatorCallExpr *Op = dyn_cast<CXXOperatorCallExpr>(E)) {
if (Op->getOperator() != OO_Equal && Op->getOperator() != OO_PipeEqual)
return;
IsOrAssign = Op->getOperator() == OO_PipeEqual;
Loc = Op->getOperatorLoc();
} else if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E))
return DiagnoseAssignmentAsCondition(POE->getSyntacticForm());
else {
return;
}
Diag(Loc, diagnostic) << E->getSourceRange();
SourceLocation Open = E->getLocStart();
SourceLocation Close = PP.getLocForEndOfToken(E->getSourceRange().getEnd());
Diag(Loc, diag::note_condition_assign_silence)
<< FixItHint::CreateInsertion(Open, "(")
<< FixItHint::CreateInsertion(Close, ")");
if (IsOrAssign)
Diag(Loc, diag::note_condition_or_assign_to_comparison)
<< FixItHint::CreateReplacement(Loc, "!=");
else
Diag(Loc, diag::note_condition_assign_to_comparison)
<< FixItHint::CreateReplacement(Loc, "==");
}
void Sema::DiagnoseEqualityWithExtraParens(ParenExpr *ParenE) {
SourceLocation parenLoc = ParenE->getLocStart();
if (parenLoc.isInvalid() || parenLoc.isMacroID())
return;
if (ParenE->isTypeDependent())
return;
Expr *E = ParenE->IgnoreParens();
if (BinaryOperator *opE = dyn_cast<BinaryOperator>(E))
if (opE->getOpcode() == BO_EQ &&
opE->getLHS()->IgnoreParenImpCasts()->isModifiableLvalue(Context)
== Expr::MLV_Valid) {
SourceLocation Loc = opE->getOperatorLoc();
Diag(Loc, diag::warn_equality_with_extra_parens) << E->getSourceRange();
SourceRange ParenERange = ParenE->getSourceRange();
Diag(Loc, diag::note_equality_comparison_silence)
<< FixItHint::CreateRemoval(ParenERange.getBegin())
<< FixItHint::CreateRemoval(ParenERange.getEnd());
Diag(Loc, diag::note_equality_comparison_to_assign)
<< FixItHint::CreateReplacement(Loc, "=");
}
}
ExprResult Sema::CheckBooleanCondition(Expr *E, SourceLocation Loc) {
DiagnoseAssignmentAsCondition(E);
if (ParenExpr *parenE = dyn_cast<ParenExpr>(E))
DiagnoseEqualityWithExtraParens(parenE);
ExprResult result = CheckPlaceholderExpr(E);
if (result.isInvalid()) return ExprError();
E = result.take();
if (!E->isTypeDependent()) {
if (getLangOpts().CPlusPlus)
return CheckCXXBooleanCondition(E);
ExprResult ERes = DefaultFunctionArrayLvalueConversion(E);
if (ERes.isInvalid())
return ExprError();
E = ERes.take();
QualType T = E->getType();
if (!T->isScalarType()) { Diag(Loc, diag::err_typecheck_statement_requires_scalar)
<< T << E->getSourceRange();
return ExprError();
}
}
return Owned(E);
}
ExprResult Sema::ActOnBooleanCondition(Scope *S, SourceLocation Loc,
Expr *SubExpr) {
if (!SubExpr)
return ExprError();
return CheckBooleanCondition(SubExpr, Loc);
}
namespace {
struct RebuildUnknownAnyFunction
: StmtVisitor<RebuildUnknownAnyFunction, ExprResult> {
Sema &S;
RebuildUnknownAnyFunction(Sema &S) : S(S) {}
ExprResult VisitStmt(Stmt *S) {
llvm_unreachable("unexpected statement!");
}
ExprResult VisitExpr(Expr *E) {
S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_call)
<< E->getSourceRange();
return ExprError();
}
template <class T> ExprResult rebuildSugarExpr(T *E) {
ExprResult SubResult = Visit(E->getSubExpr());
if (SubResult.isInvalid()) return ExprError();
Expr *SubExpr = SubResult.take();
E->setSubExpr(SubExpr);
E->setType(SubExpr->getType());
E->setValueKind(SubExpr->getValueKind());
assert(E->getObjectKind() == OK_Ordinary);
return E;
}
ExprResult VisitParenExpr(ParenExpr *E) {
return rebuildSugarExpr(E);
}
ExprResult VisitUnaryExtension(UnaryOperator *E) {
return rebuildSugarExpr(E);
}
ExprResult VisitUnaryAddrOf(UnaryOperator *E) {
ExprResult SubResult = Visit(E->getSubExpr());
if (SubResult.isInvalid()) return ExprError();
Expr *SubExpr = SubResult.take();
E->setSubExpr(SubExpr);
E->setType(S.Context.getPointerType(SubExpr->getType()));
assert(E->getValueKind() == VK_RValue);
assert(E->getObjectKind() == OK_Ordinary);
return E;
}
ExprResult resolveDecl(Expr *E, ValueDecl *VD) {
if (!isa<FunctionDecl>(VD)) return VisitExpr(E);
E->setType(VD->getType());
assert(E->getValueKind() == VK_RValue);
if (S.getLangOpts().CPlusPlus &&
!(isa<CXXMethodDecl>(VD) &&
cast<CXXMethodDecl>(VD)->isInstance()))
E->setValueKind(VK_LValue);
return E;
}
ExprResult VisitMemberExpr(MemberExpr *E) {
return resolveDecl(E, E->getMemberDecl());
}
ExprResult VisitDeclRefExpr(DeclRefExpr *E) {
return resolveDecl(E, E->getDecl());
}
};
}
static ExprResult rebuildUnknownAnyFunction(Sema &S, Expr *FunctionExpr) {
ExprResult Result = RebuildUnknownAnyFunction(S).Visit(FunctionExpr);
if (Result.isInvalid()) return ExprError();
return S.DefaultFunctionArrayConversion(Result.take());
}
namespace {
struct RebuildUnknownAnyExpr
: StmtVisitor<RebuildUnknownAnyExpr, ExprResult> {
Sema &S;
QualType DestType;
RebuildUnknownAnyExpr(Sema &S, QualType CastType)
: S(S), DestType(CastType) {}
ExprResult VisitStmt(Stmt *S) {
llvm_unreachable("unexpected statement!");
}
ExprResult VisitExpr(Expr *E) {
S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_expr)
<< E->getSourceRange();
return ExprError();
}
ExprResult VisitCallExpr(CallExpr *E);
ExprResult VisitObjCMessageExpr(ObjCMessageExpr *E);
template <class T> ExprResult rebuildSugarExpr(T *E) {
ExprResult SubResult = Visit(E->getSubExpr());
if (SubResult.isInvalid()) return ExprError();
Expr *SubExpr = SubResult.take();
E->setSubExpr(SubExpr);
E->setType(SubExpr->getType());
E->setValueKind(SubExpr->getValueKind());
assert(E->getObjectKind() == OK_Ordinary);
return E;
}
ExprResult VisitParenExpr(ParenExpr *E) {
return rebuildSugarExpr(E);
}
ExprResult VisitUnaryExtension(UnaryOperator *E) {
return rebuildSugarExpr(E);
}
ExprResult VisitUnaryAddrOf(UnaryOperator *E) {
const PointerType *Ptr = DestType->getAs<PointerType>();
if (!Ptr) {
S.Diag(E->getOperatorLoc(), diag::err_unknown_any_addrof)
<< E->getSourceRange();
return ExprError();
}
assert(E->getValueKind() == VK_RValue);
assert(E->getObjectKind() == OK_Ordinary);
E->setType(DestType);
DestType = Ptr->getPointeeType();
ExprResult SubResult = Visit(E->getSubExpr());
if (SubResult.isInvalid()) return ExprError();
E->setSubExpr(SubResult.take());
return E;
}
ExprResult VisitImplicitCastExpr(ImplicitCastExpr *E);
ExprResult resolveDecl(Expr *E, ValueDecl *VD);
ExprResult VisitMemberExpr(MemberExpr *E) {
return resolveDecl(E, E->getMemberDecl());
}
ExprResult VisitDeclRefExpr(DeclRefExpr *E) {
return resolveDecl(E, E->getDecl());
}
};
}
ExprResult RebuildUnknownAnyExpr::VisitCallExpr(CallExpr *E) {
Expr *CalleeExpr = E->getCallee();
enum FnKind {
FK_MemberFunction,
FK_FunctionPointer,
FK_BlockPointer
};
FnKind Kind;
QualType CalleeType = CalleeExpr->getType();
if (CalleeType == S.Context.BoundMemberTy) {
assert(isa<CXXMemberCallExpr>(E) || isa<CXXOperatorCallExpr>(E));
Kind = FK_MemberFunction;
CalleeType = Expr::findBoundMemberType(CalleeExpr);
} else if (const PointerType *Ptr = CalleeType->getAs<PointerType>()) {
CalleeType = Ptr->getPointeeType();
Kind = FK_FunctionPointer;
} else {
CalleeType = CalleeType->castAs<BlockPointerType>()->getPointeeType();
Kind = FK_BlockPointer;
}
const FunctionType *FnType = CalleeType->castAs<FunctionType>();
if (DestType->isArrayType() || DestType->isFunctionType()) {
unsigned diagID = diag::err_func_returning_array_function;
if (Kind == FK_BlockPointer)
diagID = diag::err_block_returning_array_function;
S.Diag(E->getExprLoc(), diagID)
<< DestType->isFunctionType() << DestType;
return ExprError();
}
E->setType(DestType.getNonLValueExprType(S.Context));
E->setValueKind(Expr::getValueKindForType(DestType));
assert(E->getObjectKind() == OK_Ordinary);
if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FnType))
DestType = S.Context.getFunctionType(DestType,
Proto->arg_type_begin(),
Proto->getNumArgs(),
Proto->getExtProtoInfo());
else
DestType = S.Context.getFunctionNoProtoType(DestType,
FnType->getExtInfo());
switch (Kind) {
case FK_MemberFunction:
break;
case FK_FunctionPointer:
DestType = S.Context.getPointerType(DestType);
break;
case FK_BlockPointer:
DestType = S.Context.getBlockPointerType(DestType);
break;
}
ExprResult CalleeResult = Visit(CalleeExpr);
if (!CalleeResult.isUsable()) return ExprError();
E->setCallee(CalleeResult.take());
return S.MaybeBindToTemporary(E);
}
ExprResult RebuildUnknownAnyExpr::VisitObjCMessageExpr(ObjCMessageExpr *E) {
if (DestType->isArrayType() || DestType->isFunctionType()) {
S.Diag(E->getExprLoc(), diag::err_func_returning_array_function)
<< DestType->isFunctionType() << DestType;
return ExprError();
}
if (ObjCMethodDecl *Method = E->getMethodDecl()) {
assert(Method->getResultType() == S.Context.UnknownAnyTy);
Method->setResultType(DestType);
}
E->setType(DestType.getNonReferenceType());
E->setValueKind(Expr::getValueKindForType(DestType));
return S.MaybeBindToTemporary(E);
}
ExprResult RebuildUnknownAnyExpr::VisitImplicitCastExpr(ImplicitCastExpr *E) {
if (E->getCastKind() == CK_FunctionToPointerDecay) {
assert(E->getValueKind() == VK_RValue);
assert(E->getObjectKind() == OK_Ordinary);
E->setType(DestType);
DestType = DestType->castAs<PointerType>()->getPointeeType();
ExprResult Result = Visit(E->getSubExpr());
if (!Result.isUsable()) return ExprError();
E->setSubExpr(Result.take());
return S.Owned(E);
} else if (E->getCastKind() == CK_LValueToRValue) {
assert(E->getValueKind() == VK_RValue);
assert(E->getObjectKind() == OK_Ordinary);
assert(isa<BlockPointerType>(E->getType()));
E->setType(DestType);
DestType = S.Context.getLValueReferenceType(DestType);
ExprResult Result = Visit(E->getSubExpr());
if (!Result.isUsable()) return ExprError();
E->setSubExpr(Result.take());
return S.Owned(E);
} else {
llvm_unreachable("Unhandled cast type!");
}
}
ExprResult RebuildUnknownAnyExpr::resolveDecl(Expr *E, ValueDecl *VD) {
ExprValueKind ValueKind = VK_LValue;
QualType Type = DestType;
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(VD)) {
if (const PointerType *Ptr = Type->getAs<PointerType>()) {
DestType = Ptr->getPointeeType();
ExprResult Result = resolveDecl(E, VD);
if (Result.isInvalid()) return ExprError();
return S.ImpCastExprToType(Result.take(), Type,
CK_FunctionToPointerDecay, VK_RValue);
}
if (!Type->isFunctionType()) {
S.Diag(E->getExprLoc(), diag::err_unknown_any_function)
<< VD << E->getSourceRange();
return ExprError();
}
if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD))
if (MD->isInstance()) {
ValueKind = VK_RValue;
Type = S.Context.BoundMemberTy;
}
if (!S.getLangOpts().CPlusPlus)
ValueKind = VK_RValue;
} else if (isa<VarDecl>(VD)) {
if (const ReferenceType *RefTy = Type->getAs<ReferenceType>()) {
Type = RefTy->getPointeeType();
} else if (Type->isFunctionType()) {
S.Diag(E->getExprLoc(), diag::err_unknown_any_var_function_type)
<< VD << E->getSourceRange();
return ExprError();
}
} else {
S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_decl)
<< VD << E->getSourceRange();
return ExprError();
}
VD->setType(DestType);
E->setType(Type);
E->setValueKind(ValueKind);
return S.Owned(E);
}
ExprResult Sema::checkUnknownAnyCast(SourceRange TypeRange, QualType CastType,
Expr *CastExpr, CastKind &CastKind,
ExprValueKind &VK, CXXCastPath &Path) {
ExprResult result = RebuildUnknownAnyExpr(*this, CastType).Visit(CastExpr);
if (!result.isUsable()) return ExprError();
CastExpr = result.take();
VK = CastExpr->getValueKind();
CastKind = CK_NoOp;
return CastExpr;
}
ExprResult Sema::forceUnknownAnyToType(Expr *E, QualType ToType) {
return RebuildUnknownAnyExpr(*this, ToType).Visit(E);
}
QualType Sema::checkUnknownAnyArg(Expr *&arg) {
ExprResult argR = CheckPlaceholderExpr(arg);
if (argR.isInvalid()) return QualType();
arg = argR.take();
if (ExplicitCastExpr *castArg = dyn_cast<ExplicitCastExpr>(arg)) {
return castArg->getTypeAsWritten();
}
return arg->getType().getUnqualifiedType();
}
static ExprResult diagnoseUnknownAnyExpr(Sema &S, Expr *E) {
Expr *orig = E;
unsigned diagID = diag::err_uncasted_use_of_unknown_any;
while (true) {
E = E->IgnoreParenImpCasts();
if (CallExpr *call = dyn_cast<CallExpr>(E)) {
E = call->getCallee();
diagID = diag::err_uncasted_call_of_unknown_any;
} else {
break;
}
}
SourceLocation loc;
NamedDecl *d;
if (DeclRefExpr *ref = dyn_cast<DeclRefExpr>(E)) {
loc = ref->getLocation();
d = ref->getDecl();
} else if (MemberExpr *mem = dyn_cast<MemberExpr>(E)) {
loc = mem->getMemberLoc();
d = mem->getMemberDecl();
} else if (ObjCMessageExpr *msg = dyn_cast<ObjCMessageExpr>(E)) {
diagID = diag::err_uncasted_call_of_unknown_any;
loc = msg->getSelectorStartLoc();
d = msg->getMethodDecl();
if (!d) {
S.Diag(loc, diag::err_uncasted_send_to_unknown_any_method)
<< static_cast<unsigned>(msg->isClassMessage()) << msg->getSelector()
<< orig->getSourceRange();
return ExprError();
}
} else {
S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_expr)
<< E->getSourceRange();
return ExprError();
}
S.Diag(loc, diagID) << d << orig->getSourceRange();
return ExprError();
}
ExprResult Sema::CheckPlaceholderExpr(Expr *E) {
const BuiltinType *placeholderType = E->getType()->getAsPlaceholderType();
if (!placeholderType) return Owned(E);
switch (placeholderType->getKind()) {
case BuiltinType::Overload: {
ExprResult result = Owned(E);
if (ResolveAndFixSingleFunctionTemplateSpecialization(result, false)) {
return result;
} else {
tryToRecoverWithCall(result, PDiag(diag::err_ovl_unresolvable),
true);
return result;
}
}
case BuiltinType::BoundMember: {
ExprResult result = Owned(E);
tryToRecoverWithCall(result, PDiag(diag::err_bound_member_function),
true);
return result;
}
case BuiltinType::ARCUnbridgedCast: {
Expr *realCast = stripARCUnbridgedCast(E);
diagnoseARCUnbridgedCast(realCast);
return Owned(realCast);
}
case BuiltinType::UnknownAny:
return diagnoseUnknownAnyExpr(*this, E);
case BuiltinType::PseudoObject:
return checkPseudoObjectRValue(E);
case BuiltinType::BuiltinFn:
Diag(E->getLocStart(), diag::err_builtin_fn_use);
return ExprError();
#define BUILTIN_TYPE(Id, SingletonId) \
case BuiltinType::Id:
#define PLACEHOLDER_TYPE(Id, SingletonId)
#include "clang/AST/BuiltinTypes.def"
break;
}
llvm_unreachable("invalid placeholder type!");
}
bool Sema::CheckCaseExpression(Expr *E) {
if (E->isTypeDependent())
return true;
if (E->isValueDependent() || E->isIntegerConstantExpr(Context))
return E->getType()->isIntegralOrEnumerationType();
return false;
}
ExprResult
Sema::ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) {
assert((Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) &&
"Unknown Objective-C Boolean value!");
QualType BoolT = Context.ObjCBuiltinBoolTy;
if (!Context.getBOOLDecl()) {
LookupResult Result(*this, &Context.Idents.get("BOOL"), OpLoc,
Sema::LookupOrdinaryName);
if (LookupName(Result, getCurScope()) && Result.isSingleResult()) {
NamedDecl *ND = Result.getFoundDecl();
if (TypedefDecl *TD = dyn_cast<TypedefDecl>(ND))
Context.setBOOLDecl(TD);
}
}
if (Context.getBOOLDecl())
BoolT = Context.getBOOLType();
return Owned(new (Context) ObjCBoolLiteralExpr(Kind == tok::kw___objc_yes,
BoolT, OpLoc));
}