llvm-project

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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -Wno-objc-root-class -emit-llvm -o - %s | FileCheck %s
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// -- classref for the message send in main()
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//
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// The class is declared with objc_class_stub, so LSB of the class pointer
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// must be set to 1.
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//
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// CHECK-LABEL: @"OBJC_CLASSLIST_REFERENCES_$_" = internal global ptr getelementptr (i8, ptr @"OBJC_CLASS_$_Base", i32 1), align 8
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// -- classref for the super message send in anotherClassMethod()
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//
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// Metaclasses do not use the "stub" mechanism and are referenced statically.
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//
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// CHECK-LABEL: @"OBJC_CLASSLIST_SUP_REFS_$_" = private global ptr @"OBJC_METACLASS_$_Derived", section "__DATA,__objc_superrefs,regular,no_dead_strip", align 8
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// -- classref for the super message send in anotherInstanceMethod()
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//
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// The class is declared with objc_class_stub, so LSB of the class pointer
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// must be set to 1.
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//
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// CHECK-LABEL: @"OBJC_CLASSLIST_SUP_REFS_$_.1" = private global ptr getelementptr (i8, ptr @"OBJC_CLASS_$_Derived", i32 1), section "__DATA,__objc_superrefs,regular,no_dead_strip", align 8
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// -- category list for class stubs goes in __objc_catlist2.
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//
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// CHECK-LABEL: @"OBJC_LABEL_STUB_CATEGORY_$" = private global [1 x ptr] [ptr @"_OBJC_$_CATEGORY_Derived_$_MyCategory"], section "__DATA,__objc_catlist2,regular,no_dead_strip", align 8
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__attribute__((objc_class_stub))
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__attribute__((objc_subclassing_restricted))
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@interface Base
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+ (void) classMethod;
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- (void) instanceMethod;
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@end
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__attribute__((objc_class_stub))
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__attribute__((objc_subclassing_restricted))
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@interface Derived : Base
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@end
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int main(void) {
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  [Base classMethod];
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}
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// CHECK-LABEL: define{{.*}} i32 @main()
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// CHECK-NEXT: entry:
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// CHECK-NEXT:   [[CLASS:%.*]] = call ptr @objc_loadClassref(ptr @"OBJC_CLASSLIST_REFERENCES_$_")
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// CHECK-NEXT:   [[SELECTOR:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
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// CHECK-NEXT:   call void @objc_msgSend(ptr noundef [[CLASS]], ptr noundef [[SELECTOR]])
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// CHECK-NEXT:   ret i32 0
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// CHECK-LABEL: declare extern_weak ptr @objc_loadClassref(ptr)
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// CHECK-SAME: [[ATTRLIST:#.*]]
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@implementation Derived (MyCategory)
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+ (void) anotherClassMethod {
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  [super classMethod];
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}
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// CHECK-LABEL: define internal void @"\01+[Derived(MyCategory) anotherClassMethod]"(ptr noundef %self, ptr noundef %_cmd) #0 {
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// CHECK-NEXT: entry:
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// CHECK:        [[SUPER:%.*]] = alloca %struct._objc_super, align 8
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// CHECK:        [[METACLASS_REF:%.*]] = load ptr, ptr @"OBJC_CLASSLIST_SUP_REFS_$_", align 8
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// CHECK:        [[DEST:%.*]] = getelementptr inbounds %struct._objc_super, ptr [[SUPER]], i32 0, i32 1
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// CHECK:        store ptr [[METACLASS_REF]], ptr [[DEST]], align 8
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// CHECK:        call void @objc_msgSendSuper2(ptr noundef [[SUPER]], ptr noundef {{%.*}})
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// CHECK:        ret void
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- (void) anotherInstanceMethod {
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  [super instanceMethod];
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}
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// CHECK-LABEL: define internal void @"\01-[Derived(MyCategory) anotherInstanceMethod]"(ptr noundef %self, ptr noundef %_cmd) #0 {
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// CHECK-NEXT: entry:
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// CHECK:        [[SUPER:%.*]] = alloca %struct._objc_super, align 8
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// CHECK:        [[CLASS_REF:%.*]] = call ptr @objc_loadClassref(ptr @"OBJC_CLASSLIST_SUP_REFS_$_.1")
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// CHECK:        [[DEST:%.*]] = getelementptr inbounds %struct._objc_super, ptr [[SUPER]], i32 0, i32 1
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// CHECK:        store ptr [[CLASS_REF]], ptr [[DEST]], align 8
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// CHECK:        call void @objc_msgSendSuper2(ptr noundef [[SUPER]], ptr noundef {{%.*}})
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// CHECK:        ret void
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@end
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// -- calls to objc_loadClassRef() are readnone
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// CHECK: attributes [[ATTRLIST]] = { nounwind nonlazybind memory(none) }
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