llvm-project
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1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -Wno-objc-root-class -emit-llvm -o - %s | FileCheck %s
2
3// -- classref for the message send in main()
4//
5// The class is declared with objc_class_stub, so LSB of the class pointer
6// must be set to 1.
7//
8// CHECK-LABEL: @"OBJC_CLASSLIST_REFERENCES_$_" = internal global ptr getelementptr (i8, ptr @"OBJC_CLASS_$_Base", i32 1), align 8
9
10// -- classref for the super message send in anotherClassMethod()
11//
12// Metaclasses do not use the "stub" mechanism and are referenced statically.
13//
14// CHECK-LABEL: @"OBJC_CLASSLIST_SUP_REFS_$_" = private global ptr @"OBJC_METACLASS_$_Derived", section "__DATA,__objc_superrefs,regular,no_dead_strip", align 8
15
16// -- classref for the super message send in anotherInstanceMethod()
17//
18// The class is declared with objc_class_stub, so LSB of the class pointer
19// must be set to 1.
20//
21// 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
22
23// -- category list for class stubs goes in __objc_catlist2.
24//
25// CHECK-LABEL: @"OBJC_LABEL_STUB_CATEGORY_$" = private global [1 x ptr] [ptr @"_OBJC_$_CATEGORY_Derived_$_MyCategory"], section "__DATA,__objc_catlist2,regular,no_dead_strip", align 8
26
27__attribute__((objc_class_stub))
28__attribute__((objc_subclassing_restricted))
29@interface Base
30+ (void) classMethod;
31- (void) instanceMethod;
32@end
33
34__attribute__((objc_class_stub))
35__attribute__((objc_subclassing_restricted))
36@interface Derived : Base
37@end
38
39int main(void) {
40[Base classMethod];
41}
42// CHECK-LABEL: define{{.*}} i32 @main()
43// CHECK-NEXT: entry:
44// CHECK-NEXT: [[CLASS:%.*]] = call ptr @objc_loadClassref(ptr @"OBJC_CLASSLIST_REFERENCES_$_")
45// CHECK-NEXT: [[SELECTOR:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
46// CHECK-NEXT: call void @objc_msgSend(ptr noundef [[CLASS]], ptr noundef [[SELECTOR]])
47// CHECK-NEXT: ret i32 0
48
49// CHECK-LABEL: declare extern_weak ptr @objc_loadClassref(ptr)
50// CHECK-SAME: [[ATTRLIST:#.*]]
51
52@implementation Derived (MyCategory)
53
54+ (void) anotherClassMethod {
55[super classMethod];
56}
57// CHECK-LABEL: define internal void @"\01+[Derived(MyCategory) anotherClassMethod]"(ptr noundef %self, ptr noundef %_cmd) #0 {
58// CHECK-NEXT: entry:
59// CHECK: [[SUPER:%.*]] = alloca %struct._objc_super, align 8
60// CHECK: [[METACLASS_REF:%.*]] = load ptr, ptr @"OBJC_CLASSLIST_SUP_REFS_$_", align 8
61// CHECK: [[DEST:%.*]] = getelementptr inbounds %struct._objc_super, ptr [[SUPER]], i32 0, i32 1
62// CHECK: store ptr [[METACLASS_REF]], ptr [[DEST]], align 8
63// CHECK: call void @objc_msgSendSuper2(ptr noundef [[SUPER]], ptr noundef {{%.*}})
64// CHECK: ret void
65
66- (void) anotherInstanceMethod {
67[super instanceMethod];
68}
69// CHECK-LABEL: define internal void @"\01-[Derived(MyCategory) anotherInstanceMethod]"(ptr noundef %self, ptr noundef %_cmd) #0 {
70// CHECK-NEXT: entry:
71// CHECK: [[SUPER:%.*]] = alloca %struct._objc_super, align 8
72// CHECK: [[CLASS_REF:%.*]] = call ptr @objc_loadClassref(ptr @"OBJC_CLASSLIST_SUP_REFS_$_.1")
73// CHECK: [[DEST:%.*]] = getelementptr inbounds %struct._objc_super, ptr [[SUPER]], i32 0, i32 1
74// CHECK: store ptr [[CLASS_REF]], ptr [[DEST]], align 8
75// CHECK: call void @objc_msgSendSuper2(ptr noundef [[SUPER]], ptr noundef {{%.*}})
76// CHECK: ret void
77
78@end
79
80// -- calls to objc_loadClassRef() are readnone
81// CHECK: attributes [[ATTRLIST]] = { nounwind nonlazybind memory(none) }
82