joedaniels29 updated this revision to Diff 184671.
joedaniels29 marked 4 inline comments as done.
joedaniels29 added a comment.
Herald added a project: clang.
Docs changes, formatting.
Repository:
rC Clang
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D56555/new/
https://reviews.llvm.org/D56555
Files:
clang/include/clang/Basic/Attr.td
clang/include/clang/Basic/AttrDocs.td
clang/lib/CodeGen/CGObjCMac.cpp
clang/lib/Sema/SemaDeclAttr.cpp
clang/test/CodeGenObjC/non-lazy-classes.m
clang/test/Misc/pragma-attribute-supported-attributes-list.test
clang/test/SemaObjC/attr-objc-non-lazy.m
Index: clang/test/SemaObjC/attr-objc-non-lazy.m
===================================================================
--- /dev/null
+++ clang/test/SemaObjC/attr-objc-non-lazy.m
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -verify -Wno-objc-root-class -fsyntax-only %s
+
+__attribute__((objc_nonlazy_class))
+@interface A
+@end
+@implementation A
+@end
+
+__attribute__((objc_nonlazy_class)) int X; // expected-error {{'objc_nonlazy_class' attribute only applies to Objective-C interfaces}}
+
+__attribute__((objc_nonlazy_class()))
+@interface B
+@end
+@implementation B
+@end
+
+__attribute__((objc_nonlazy_class("foo"))) // expected-error{{'objc_nonlazy_class' attribute takes no arguments}}
+@interface C
+@end
+@implementation C
+@end
+
+__attribute__((objc_nonlazy_class)) // expected-error {{'objc_nonlazy_class' attribute only applies to Objective-C interfaces}}
+@protocol B
+@end
+
+__attribute__((objc_nonlazy_class)) // expected-error {{'objc_nonlazy_class' attribute only applies to Objective-C interfaces}}
+void foo();
+
+@interface E
+@end
+__attribute__((objc_nonlazy_class))
+@implementation E // expected-error {{prefix attribute must be followed by an interface or protocol}}
+@end
Index: clang/test/Misc/pragma-attribute-supported-attributes-list.test
===================================================================
--- clang/test/Misc/pragma-attribute-supported-attributes-list.test
+++ clang/test/Misc/pragma-attribute-supported-attributes-list.test
@@ -2,7 +2,7 @@
// The number of supported attributes should never go down!
-// CHECK: #pragma clang attribute supports 129 attributes:
+// CHECK: #pragma clang attribute supports 130 attributes:
// CHECK-NEXT: AMDGPUFlatWorkGroupSize (SubjectMatchRule_function)
// CHECK-NEXT: AMDGPUNumSGPR (SubjectMatchRule_function)
// CHECK-NEXT: AMDGPUNumVGPR (SubjectMatchRule_function)
@@ -92,6 +92,7 @@
// CHECK-NEXT: ObjCException (SubjectMatchRule_objc_interface)
// CHECK-NEXT: ObjCExplicitProtocolImpl (SubjectMatchRule_objc_protocol)
// CHECK-NEXT: ObjCMethodFamily (SubjectMatchRule_objc_method)
+// CHECK-NEXT: ObjCNonLazyClass (SubjectMatchRule_objc_interface)
// CHECK-NEXT: ObjCPreciseLifetime (SubjectMatchRule_variable)
// CHECK-NEXT: ObjCRequiresPropertyDefs (SubjectMatchRule_objc_interface)
// CHECK-NEXT: ObjCRequiresSuper (SubjectMatchRule_objc_method)
Index: clang/test/CodeGenObjC/non-lazy-classes.m
===================================================================
--- clang/test/CodeGenObjC/non-lazy-classes.m
+++ clang/test/CodeGenObjC/non-lazy-classes.m
@@ -1,6 +1,6 @@
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -Wno-objc-root-class -emit-llvm -o - %s | \
// RUN: FileCheck %s
-// CHECK: @"OBJC_LABEL_NONLAZY_CLASS_$" = private global [1 x {{.*}}] {{.*}}@"OBJC_CLASS_$_A"{{.*}}, section "__DATA,__objc_nlclslist,regular,no_dead_strip", align 8
+// CHECK: @"OBJC_LABEL_NONLAZY_CLASS_$" = private global [2 x {{.*}}]{{.*}}@"OBJC_CLASS_$_A"{{.*}},{{.*}}@"OBJC_CLASS_$_D"{{.*}} section "__DATA,__objc_nlclslist,regular,no_dead_strip", align 8
// CHECK: @"OBJC_LABEL_NONLAZY_CATEGORY_$" = private global [1 x {{.*}}] {{.*}}@"\01l_OBJC_$_CATEGORY_A_$_Cat"{{.*}}, section "__DATA,__objc_nlcatlist,regular,no_dead_strip", align 8
@interface A @end
@@ -30,3 +30,8 @@
@interface C : A @end
@implementation C
@end
+
+__attribute__((objc_nonlazy_class))
+@interface D @end
+
+@implementation D @end
Index: clang/lib/Sema/SemaDeclAttr.cpp
===================================================================
--- clang/lib/Sema/SemaDeclAttr.cpp
+++ clang/lib/Sema/SemaDeclAttr.cpp
@@ -6374,6 +6374,9 @@
case ParsedAttr::AT_ObjCRootClass:
handleSimpleAttribute<ObjCRootClassAttr>(S, D, AL);
break;
+ case ParsedAttr::AT_ObjCNonLazyClass:
+ handleSimpleAttribute<ObjCNonLazyClassAttr>(S, D, AL);
+ break;
case ParsedAttr::AT_ObjCSubclassingRestricted:
handleSimpleAttribute<ObjCSubclassingRestrictedAttr>(S, D, AL);
break;
Index: clang/lib/CodeGen/CGObjCMac.cpp
===================================================================
--- clang/lib/CodeGen/CGObjCMac.cpp
+++ clang/lib/CodeGen/CGObjCMac.cpp
@@ -6253,9 +6253,10 @@
return GV;
}
-bool
-CGObjCNonFragileABIMac::ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
- return OD->getClassMethod(GetNullarySelector("load")) != nullptr;
+bool CGObjCNonFragileABIMac::ImplementationIsNonLazy(
+ const ObjCImplDecl *OD) const {
+ return OD->getClassMethod(GetNullarySelector("load")) != nullptr ||
+ OD->getClassInterface()->hasAttr<ObjCNonLazyClassAttr>();
}
void CGObjCNonFragileABIMac::GetClassSizeInfo(const ObjCImplementationDecl *OID,
Index: clang/include/clang/Basic/AttrDocs.td
===================================================================
--- clang/include/clang/Basic/AttrDocs.td
+++ clang/include/clang/Basic/AttrDocs.td
@@ -3498,6 +3498,19 @@
}];
}
+def ObjCNonLazyClassDocs : Documentation {
+ let Category = DocCatType;
+ let Content = [{
+This attribute can be added to an Objective-C ``@interface`` declaration to
+add the class to the list of non-lazily initialized classes. A non-lazy class
+will be initialized eagerly when the Objective-C runtime is loaded. This is
+required for certain system classes which have instances allocated in
+non-standard ways, such as the classes for blocks and constant strings. Adding
+this attribute is essentially equivalent to providing a trivial `+load` method
+but avoids the (fairly small) load-time overheads associated with defining and
+calling such a method.
+ }];
+}
def SelectAnyDocs : Documentation {
let Category = DocCatType;
Index: clang/include/clang/Basic/Attr.td
===================================================================
--- clang/include/clang/Basic/Attr.td
+++ clang/include/clang/Basic/Attr.td
@@ -1690,6 +1690,13 @@
let Documentation = [Undocumented];
}
+def ObjCNonLazyClass : Attr {
+ let Spellings = [Clang<"objc_nonlazy_class">];
+ let Subjects = SubjectList<[ObjCInterface], ErrorDiag>;
+ let LangOpts = [ObjC];
+ let Documentation = [ObjCNonLazyClassDocs];
+}
+
def ObjCSubclassingRestricted : InheritableAttr {
let Spellings = [Clang<"objc_subclassing_restricted">];
let Subjects = SubjectList<[ObjCInterface], ErrorDiag>;
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