r195061 - ObjectiveC ARC. Adopt objc_bridge attribute
Aaron Ballman
aaron at aaronballman.com
Mon Nov 18 17:24:05 PST 2013
On Mon, Nov 18, 2013 at 7:09 PM, Fariborz Jahanian <fjahanian at apple.com> wrote:
> Author: fjahanian
> Date: Mon Nov 18 18:09:48 2013
> New Revision: 195061
>
> URL: http://llvm.org/viewvc/llvm-project?rev=195061&view=rev
> Log:
> ObjectiveC ARC. Adopt objc_bridge attribute
> on struct/union/class instead of typedef of
> such types. // rdar://15454846
>
> Modified:
> cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
> cfe/trunk/lib/Sema/SemaDecl.cpp
> cfe/trunk/lib/Sema/SemaDeclAttr.cpp
> cfe/trunk/lib/Sema/SemaExprObjC.cpp
> cfe/trunk/test/SemaObjC/objcbridge-attribute.m
>
> Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=195061&r1=195060&r2=195061&view=diff
> ==============================================================================
> --- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
> +++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Mon Nov 18 18:09:48 2013
> @@ -2442,11 +2442,9 @@ def err_ns_bridged_not_interface : Error
> def err_objc_bridge_not_id : Error<
> "parameter of 'objc_bridge' attribute must be a single name of an Objective-C class">;
> def err_objc_bridge_attribute : Error<
> - "'objc_bridge' attribute must be put on a typedef only">;
> + "'objc_bridge' attribute must be applied to a struct, C++ class, or union">;
Please use err_attribute_wrong_decl_type instead of a custom error message.
> def err_objc_bridge_not_cftype : Error<
> "'objc_bridge' attribute must be applied to definition of CF types">;
> -def err_objc_bridge_not_pointert_to_struct : Error<
> - "'objc_bridge' attribute must be applied to a pointer to struct type">;
> def err_objc_cf_bridged_not_interface : Error<
> "CF object of type %0 is bridged to '%1', which is not an Objective-C class">;
> def err_objc_ns_bridged_invalid_cfobject : Error<
>
> Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=195061&r1=195060&r2=195061&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
> +++ cfe/trunk/lib/Sema/SemaDecl.cpp Mon Nov 18 18:09:48 2013
> @@ -10072,6 +10072,31 @@ void Sema::AddKnownFunctionAttributes(Fu
> }
> }
>
> +static inline bool isTollFreeBridgeCFRefType(TypedefDecl *TD) {
> + TypedefNameDecl * TDefNameDecl = TD;
Extra space surrounding the asterisk.
> + const Type *TP = TDefNameDecl->getUnderlyingType().getTypePtr();
> + while (const TypedefType *TDef = dyn_cast<TypedefType>(TP)) {
> + TDefNameDecl = TDef->getDecl();
> + TP = TDefNameDecl->getUnderlyingType().getTypePtr();
> + }
> +
> + StringRef TDName = TDefNameDecl->getIdentifier()->getName();
> + return (TDName.startswith("CF") && TDName.endswith("Ref"));
> +}
> +
> +/// CheckObjCBridgeAttribute - Checks that objc_bridge attribute is
> +/// properly applied to a typedef of a pointer to struct/union/class
> +static void CheckObjCBridgeAttribute(Sema &S, TypedefDecl *TD) {
> + QualType T = TD->getUnderlyingType();
> + if (!T->isPointerType())
> + return;
This behavior doesn't match the comments -- if it's not a pointer
type, should it not have a diagnostic?
> + T = T->getPointeeType();
> + if (T->isStructureType() || T->isUnionType() || T->isClassType())
> + if (RecordDecl *RD = T->getAs<RecordType>()->getDecl())
> + if (RD->hasAttr<ObjCBridgeAttr>() && !isTollFreeBridgeCFRefType(TD))
> + S.Diag(TD->getLocStart(), diag::err_objc_bridge_not_cftype);
> +}
> +
> TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
> TypeSourceInfo *TInfo) {
> assert(D.getIdentifier() && "Wrong callback for declspec without declarator");
> @@ -10095,6 +10120,8 @@ TypedefDecl *Sema::ParseTypedefDecl(Scop
> return NewTD;
> }
>
> + CheckObjCBridgeAttribute(*this, NewTD);
Why did this functionality move out of SemaDeclAttr.cpp and into SemaDecl.cpp?
> +
> if (D.getDeclSpec().isModulePrivateSpecified()) {
> if (CurContext->isFunctionOrMethod())
> Diag(NewTD->getLocation(), diag::err_module_private_local)
>
> Modified: cfe/trunk/lib/Sema/SemaDeclAttr.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclAttr.cpp?rev=195061&r1=195060&r2=195061&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Sema/SemaDeclAttr.cpp (original)
> +++ cfe/trunk/lib/Sema/SemaDeclAttr.cpp Mon Nov 18 18:09:48 2013
> @@ -207,11 +207,6 @@ static inline bool isCFStringType(QualTy
> return RD->getIdentifier() == &Ctx.Idents.get("__CFString");
> }
>
> -static inline bool isTollFreeBridgeCFRefType(TypedefNameDecl *TD, ASTContext &Ctx) {
> - StringRef TDName = TD->getIdentifier()->getName();
> - return (TDName.startswith("CF") && TDName.endswith("Ref"));
> -}
> -
> static unsigned getNumAttributeArgs(const AttributeList &Attr) {
> // FIXME: Include the type in the argument list.
> return Attr.getNumArgs() + Attr.hasParsedType();
> @@ -4396,34 +4391,7 @@ static void handleNSBridgedAttr(Sema &S,
>
> static void handleObjCBridgeAttr(Sema &S, Scope *Sc, Decl *D,
> const AttributeList &Attr) {
> - if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
> - QualType T = TD->getUnderlyingType();
> - if (T->isPointerType()) {
> - T = T->getPointeeType();
> - if (T->isRecordType()) {
> - RecordDecl *RD = T->getAs<RecordType>()->getDecl();
> - if (!RD || RD->isUnion()) {
> - S.Diag(D->getLocStart(), diag::err_objc_bridge_not_pointert_to_struct)
> - << Attr.getRange();
> - return;
> - }
> - } else {
> - S.Diag(TD->getLocStart(), diag::err_objc_bridge_not_pointert_to_struct)
> - << Attr.getRange();
> - return;
> - }
> - } else {
> - S.Diag(TD->getLocStart(), diag::err_objc_bridge_not_pointert_to_struct)
> - << Attr.getRange();
> - return;
> - }
> - // Check for T being a CFType goes here.
> - if (!isTollFreeBridgeCFRefType(TD, S.Context)) {
> - S.Diag(TD->getLocStart(), diag::err_objc_bridge_not_cftype);
> - return;
> - }
> - }
> - else {
> + if (!isa<RecordDecl>(D)) {
> S.Diag(D->getLocStart(), diag::err_objc_bridge_attribute);
> return;
> }
>
> Modified: cfe/trunk/lib/Sema/SemaExprObjC.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExprObjC.cpp?rev=195061&r1=195060&r2=195061&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Sema/SemaExprObjC.cpp (original)
> +++ cfe/trunk/lib/Sema/SemaExprObjC.cpp Mon Nov 18 18:09:48 2013
> @@ -3165,15 +3165,26 @@ diagnoseObjCARCConversion(Sema &S, Sourc
> << castRange << castExpr->getSourceRange();
> }
>
> +static inline ObjCBridgeAttr *getObjCBridgeAttr(const TypedefType *TD) {
> + TypedefNameDecl *TDNDecl = TD->getDecl();
> + QualType QT = TDNDecl->getUnderlyingType();
> + if (QT->isPointerType()) {
> + QT = QT->getPointeeType();
> + if (QT->isStructureType() || QT->isUnionType() || QT->isClassType())
> + if (RecordDecl *RD = QT->getAs<RecordType>()->getDecl())
> + if (RD->hasAttr<ObjCBridgeAttr>())
> + return RD->getAttr<ObjCBridgeAttr>();
> + }
> + return 0;
> +}
> +
> static bool CheckObjCBridgeNSCast(Sema &S, QualType castType, Expr *castExpr) {
> QualType T = castExpr->getType();
> while (const TypedefType *TD = dyn_cast<TypedefType>(T.getTypePtr())) {
> TypedefNameDecl *TDNDecl = TD->getDecl();
> - if (TDNDecl->hasAttr<ObjCBridgeAttr>()) {
> - ObjCBridgeAttr *ObjCBAttr = TDNDecl->getAttr<ObjCBridgeAttr>();
> - IdentifierInfo *Parm = ObjCBAttr->getBridgedType();
> - NamedDecl *Target = 0;
> - if (Parm && S.getLangOpts().ObjC1) {
> + if (ObjCBridgeAttr *ObjCBAttr = getObjCBridgeAttr(TD)) {
> + if (IdentifierInfo *Parm = ObjCBAttr->getBridgedType()) {
> + NamedDecl *Target = 0;
> // Check for an existing type with this name.
> LookupResult R(S, DeclarationName(Parm), SourceLocation(),
> Sema::LookupOrdinaryName);
> @@ -3215,11 +3226,9 @@ static bool CheckObjCBridgeCFCast(Sema &
> QualType T = castType;
> while (const TypedefType *TD = dyn_cast<TypedefType>(T.getTypePtr())) {
> TypedefNameDecl *TDNDecl = TD->getDecl();
> - if (TDNDecl->hasAttr<ObjCBridgeAttr>()) {
> - ObjCBridgeAttr *ObjCBAttr = TDNDecl->getAttr<ObjCBridgeAttr>();
> - IdentifierInfo *Parm = ObjCBAttr->getBridgedType();
> - NamedDecl *Target = 0;
> - if (Parm && S.getLangOpts().ObjC1) {
> + if (ObjCBridgeAttr *ObjCBAttr = getObjCBridgeAttr(TD)) {
> + if (IdentifierInfo *Parm = ObjCBAttr->getBridgedType()) {
> + NamedDecl *Target = 0;
> // Check for an existing type with this name.
> LookupResult R(S, DeclarationName(Parm), SourceLocation(),
> Sema::LookupOrdinaryName);
>
> Modified: cfe/trunk/test/SemaObjC/objcbridge-attribute.m
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjC/objcbridge-attribute.m?rev=195061&r1=195060&r2=195061&view=diff
> ==============================================================================
> --- cfe/trunk/test/SemaObjC/objcbridge-attribute.m (original)
> +++ cfe/trunk/test/SemaObjC/objcbridge-attribute.m Mon Nov 18 18:09:48 2013
> @@ -1,37 +1,41 @@
> // RUN: %clang_cc1 -fsyntax-only -fobjc-arc -verify -Wno-objc-root-class %s
> // rdar://15454846
>
> -typedef struct __CFErrorRef * __attribute__ ((objc_bridge(NSError))) CFErrorRef; // expected-note 2 {{declared here}}
> +typedef struct __attribute__ ((objc_bridge(NSError))) __CFErrorRef * CFErrorRef; // expected-note 2 {{declared here}}
>
> -typedef struct __CFMyColor * __attribute__((objc_bridge(12))) CFMyColorRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
> +typedef struct __attribute__((objc_bridge(12))) __CFMyColor *CFMyColorRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
>
> -typedef struct __CFArray * __attribute__ ((objc_bridge)) CFArrayRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
> +typedef struct __attribute__ ((objc_bridge)) __CFArray *CFArrayRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
>
> -typedef void * __attribute__ ((objc_bridge(NSURL))) CFURLRef; // expected-error {{'objc_bridge' attribute must be applied to a pointer to struct type}}
> +typedef void * __attribute__ ((objc_bridge(NSURL))) CFURLRef; // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}}
>
> -typedef void * CFStringRef __attribute__ ((objc_bridge(NSString))); // expected-error {{'objc_bridge' attribute must be applied to a pointer to struct type}}
> +typedef void * CFStringRef __attribute__ ((objc_bridge(NSString))); // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}}
>
> -typedef struct __CFLocale * __attribute__((objc_bridge(NSLocale, NSError))) CFLocaleRef;// expected-error {{use of undeclared identifier 'NSError'}}
> +typedef struct __attribute__((objc_bridge(NSLocale, NSError))) __CFLocale *CFLocaleRef;// expected-error {{use of undeclared identifier 'NSError'}}
>
> -typedef struct __CFData __attribute__((objc_bridge(NSData))) CFDataRef; // expected-error {{'objc_bridge' attribute must be applied to a pointer to struct type}}
> +typedef struct __CFData __attribute__((objc_bridge(NSData))) CFDataRef; // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}}
>
> -typedef struct __attribute__((objc_bridge(NSDictionary))) __CFDictionary * CFDictionaryRef; // expected-error {{'objc_bridge' attribute must be put on a typedef only}}
> +typedef struct __attribute__((objc_bridge(NSDictionary))) __CFDictionary * CFDictionaryRef;
>
> -typedef struct __CFSetRef * CFSetRef __attribute__((objc_bridge(NSSet)));
> +typedef struct __CFSetRef * CFSetRef __attribute__((objc_bridge(NSSet))); // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}};
>
> -typedef union __CFUColor * __attribute__((objc_bridge(NSUColor))) CFUColorRef; // expected-error {{'objc_bridge' attribute must be applied to a pointer to struct type}}
> +typedef union __CFUColor __attribute__((objc_bridge(NSUColor))) * CFUColorRef; // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}};
> +
> +typedef union __CFUColor __attribute__((objc_bridge(NSUColor))) *CFUColor1Ref; // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}};
> +
> +typedef union __attribute__((objc_bridge(NSUColor))) __CFUPrimeColor XXX;
> +typedef XXX *CFUColor2Ref;
>
> @interface I
> {
> - __attribute__((objc_bridge(NSError))) void * color; // expected-error {{'objc_bridge' attribute must be put on a typedef only}}
> -
> + __attribute__((objc_bridge(NSError))) void * color; // expected-error {{'objc_bridge' attribute must be applied to a struct, C++ class, or union}};
> }
> @end
>
> @protocol NSTesting @end
> @class NSString;
>
> -typedef struct __CFError * __attribute__((objc_bridge(NSTesting))) CFTestingRef; // expected-note {{declared here}}
> +typedef struct __attribute__((objc_bridge(NSTesting))) __CFError *CFTestingRef; // expected-note {{declared here}}
>
> id Test1(CFTestingRef cf) {
> return (NSString *)cf; // expected-error {{CF object of type 'CFTestingRef' (aka 'struct __CFError *') is bridged to 'NSTesting', which is not an Objective-C class}}
> @@ -46,14 +50,17 @@ typedef CFErrorRef1 CFErrorRef2;
> @interface MyError : NSError
> @end
>
> + at interface NSUColor @end
> +
> @class NSString;
>
> -void Test2(CFErrorRef2 cf, NSError *ns, NSString *str, Class c) {
> - (void)(NSString *)cf; // expected-warning {{CFErrorRef bridges to NSError, not NSString}}
> +void Test2(CFErrorRef2 cf, NSError *ns, NSString *str, Class c, CFUColor2Ref cf2) {
> + (void)(NSString *)cf; // expected-warning {{CFErrorRef2 bridges to NSError, not NSString}}
> (void)(NSError *)cf; // okay
> (void)(MyError*)cf; // okay,
> + (void)(NSUColor *)cf2; // okay
> (void)(CFErrorRef)ns; // okay
> (void)(CFErrorRef)str; // expected-warning {{NSString cannot bridge to CFErrorRef}}
> - (void)(Class)cf; // expected-warning {{CFErrorRef bridges to NSError, not 'Class'}}
> + (void)(Class)cf; // expected-warning {{CFErrorRef2 bridges to NSError, not 'Class'}}
> (void)(CFErrorRef)c; // expected-warning {{'Class' cannot bridge to 'CFErrorRef'}}
> }
>
>
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~Aaron
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