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150
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1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -Wno-objc-root-class -emit-llvm -o - %s | FileCheck %s
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2
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3 // -- classref for the message send in main()
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4 //
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5 // The class is declared with objc_class_stub, so LSB of the class pointer
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6 // must be set to 1.
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7 //
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8 // CHECK-LABEL: @"OBJC_CLASSLIST_REFERENCES_$_" = internal global i8* getelementptr (i8, i8* bitcast (%struct._class_t* @"OBJC_CLASS_$_Base" to i8*), i32 1), align 8
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9
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10 // -- classref for the super message send in anotherClassMethod()
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11 //
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12 // Metaclasses do not use the "stub" mechanism and are referenced statically.
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13 //
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14 // CHECK-LABEL: @"OBJC_CLASSLIST_SUP_REFS_$_" = internal global %struct._class_t* @"OBJC_METACLASS_$_Derived", section "__DATA,__objc_superrefs,regular,no_dead_strip", align 8
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15
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16 // -- classref for the super message send in anotherInstanceMethod()
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17 //
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18 // The class is declared with objc_class_stub, so LSB of the class pointer
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19 // must be set to 1.
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20 //
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21 // CHECK-LABEL: @"OBJC_CLASSLIST_SUP_REFS_$_.1" = internal global i8* getelementptr (i8, i8* bitcast (%struct._class_t* @"OBJC_CLASS_$_Derived" to i8*), i32 1), section "__DATA,__objc_superrefs,regular,no_dead_strip", align 8
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22
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23 // -- category list for class stubs goes in __objc_catlist2.
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24 //
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25 // CHECK-LABEL: @"OBJC_LABEL_STUB_CATEGORY_$" = internal global [1 x i8*] [i8* bitcast (%struct._category_t* @"_OBJC_$_CATEGORY_Derived_$_MyCategory" to i8*)], section "__DATA,__objc_catlist2,regular,no_dead_strip", align 8
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26
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27 __attribute__((objc_class_stub))
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28 __attribute__((objc_subclassing_restricted))
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29 @interface Base
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30 + (void) classMethod;
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31 - (void) instanceMethod;
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32 @end
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33
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34 __attribute__((objc_class_stub))
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35 __attribute__((objc_subclassing_restricted))
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36 @interface Derived : Base
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37 @end
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38
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39 int main() {
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40 [Base classMethod];
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41 }
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42 // CHECK-LABEL: define i32 @main()
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43 // CHECK-NEXT: entry:
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44 // CHECK-NEXT: [[CLASS:%.*]] = call %struct._class_t* @objc_loadClassref(i8** @"OBJC_CLASSLIST_REFERENCES_$_")
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45 // CHECK-NEXT: [[SELECTOR:%.*]] = load i8*, i8** @OBJC_SELECTOR_REFERENCES_
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46 // CHECK-NEXT: [[RECEIVER:%.*]] = bitcast %struct._class_t* [[CLASS]] to i8*
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47 // CHECK-NEXT: call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*)*)(i8* [[RECEIVER]], i8* [[SELECTOR]])
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48 // CHECK-NEXT: ret i32 0
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49
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50 // CHECK-LABEL: declare extern_weak %struct._class_t* @objc_loadClassref(i8**)
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51 // CHECK-SAME: [[ATTRLIST:#.*]]
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52
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53 @implementation Derived (MyCategory)
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54
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55 + (void) anotherClassMethod {
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56 [super classMethod];
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57 }
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58 // CHECK-LABEL: define internal void @"\01+[Derived(MyCategory) anotherClassMethod]"(i8* %self, i8* %_cmd) #0 {
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59 // CHECK-NEXT: entry:
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60 // CHECK: [[SUPER:%.*]] = alloca %struct._objc_super, align 8
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61 // CHECK: [[METACLASS_REF:%.*]] = load %struct._class_t*, %struct._class_t** @"OBJC_CLASSLIST_SUP_REFS_$_", align 8
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62 // CHECK: [[CAST_METACLASS_REF:%.*]] = bitcast %struct._class_t* [[METACLASS_REF]] to i8*
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63 // CHECK: [[DEST:%.*]] = getelementptr inbounds %struct._objc_super, %struct._objc_super* [[SUPER]], i32 0, i32 1
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64 // CHECK: store i8* [[CAST_METACLASS_REF]], i8** [[DEST]], align 8
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65 // CHECK: call void bitcast (i8* (%struct._objc_super*, i8*, ...)* @objc_msgSendSuper2 to void (%struct._objc_super*, i8*)*)(%struct._objc_super* [[SUPER]], i8* {{%.*}})
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66 // CHECK: ret void
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67
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68 - (void) anotherInstanceMethod {
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69 [super instanceMethod];
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70 }
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71 // CHECK-LABEL: define internal void @"\01-[Derived(MyCategory) anotherInstanceMethod]"(%0* %self, i8* %_cmd) #0 {
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72 // CHECK-NEXT: entry:
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73 // CHECK: [[SUPER:%.*]] = alloca %struct._objc_super, align 8
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74 // CHECK: [[CLASS_REF:%.*]] = call %struct._class_t* @objc_loadClassref(i8** @"OBJC_CLASSLIST_SUP_REFS_$_.1")
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75 // CHECK: [[CAST_CLASS_REF:%.*]] = bitcast %struct._class_t* [[CLASS_REF]] to i8*
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76 // CHECK: [[DEST:%.*]] = getelementptr inbounds %struct._objc_super, %struct._objc_super* [[SUPER]], i32 0, i32 1
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77 // CHECK: store i8* [[CAST_CLASS_REF]], i8** [[DEST]], align 8
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78 // CHECK: call void bitcast (i8* (%struct._objc_super*, i8*, ...)* @objc_msgSendSuper2 to void (%struct._objc_super*, i8*)*)(%struct._objc_super* [[SUPER]], i8* {{%.*}})
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79 // CHECK: ret void
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80
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81 @end
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82
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83 // -- calls to objc_loadClassRef() are readnone
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84 // CHECK: attributes [[ATTRLIST]] = { nounwind nonlazybind readnone }
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