1 // RUN: %clang_cc1 -emit-llvm -O1 -o - -triple=i386-pc-win32 %s | FileCheck %s 2 3 struct S { char a; }; 4 struct V { virtual void f(); }; 5 struct A : virtual V {}; 6 struct B : S, virtual V {}; 7 struct T {}; 8 9 T* test0() { return dynamic_cast<T*>((B*)0); } 10 // CHECK-LABEL: define noalias %struct.T* @"\01?test0@@YAPAUT@@XZ"() 11 // CHECK: ret %struct.T* null 12 13 T* test1(V* x) { return &dynamic_cast<T&>(*x); } 14 // CHECK-LABEL: define %struct.T* @"\01?test1@@YAPAUT@@PAUV@@@Z"(%struct.V* %x) 15 // CHECK: [[CAST:%.*]] = bitcast %struct.V* %x to i8* 16 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[CAST]], i32 0, i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUV@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUT@@@8" to i8*), i32 1) 17 // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* 18 // CHECK-NEXT: ret %struct.T* [[RET]] 19 20 T* test2(A* x) { return &dynamic_cast<T&>(*x); } 21 // CHECK-LABEL: define %struct.T* @"\01?test2@@YAPAUT@@PAUA@@@Z"(%struct.A* %x) 22 // CHECK: [[CAST:%.*]] = bitcast %struct.A* %x to i8* 23 // CHECK-NEXT: [[BITCAST:%.*]] = bitcast %struct.A* %x to i8** 24 // CHECK-NEXT: [[VBTBL:%.*]] = load i8** [[BITCAST]], align 4 25 // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i8* [[VBTBL]], i32 4 26 // CHECK-NEXT: [[VBOFFPCAST:%.*]] = bitcast i8* [[VBOFFP]] to i32* 27 // CHECK-NEXT: [[VBOFFS:%.*]] = load i32* [[VBOFFPCAST]], align 4 28 // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8* [[CAST]], i32 [[VBOFFS]] 29 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[ADJ]], i32 [[VBOFFS]], i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUA@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUT@@@8" to i8*), i32 1) 30 // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* 31 // CHECK-NEXT: ret %struct.T* [[RET]] 32 33 T* test3(B* x) { return &dynamic_cast<T&>(*x); } 34 // CHECK-LABEL: define %struct.T* @"\01?test3@@YAPAUT@@PAUB@@@Z"(%struct.B* %x) 35 // CHECK: [[VOIDP:%.*]] = getelementptr inbounds %struct.B* %x, i32 0, i32 0, i32 0 36 // CHECK-NEXT: [[VBPTR:%.*]] = getelementptr inbounds i8* [[VOIDP]], i32 4 37 // CHECK-NEXT: [[BITCAST:%.*]] = bitcast i8* [[VBPTR:%.*]] to i8** 38 // CHECK-NEXT: [[VBTBL:%.*]] = load i8** [[BITCAST]], align 4 39 // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i8* [[VBTBL]], i32 4 40 // CHECK-NEXT: [[VBOFFPCAST:%.*]] = bitcast i8* [[VBOFFP]] to i32* 41 // CHECK-NEXT: [[VBOFFS:%.*]] = load i32* [[VBOFFPCAST]], align 4 42 // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 43 // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8* [[VOIDP]], i32 [[DELTA]] 44 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[ADJ]], i32 [[DELTA]], i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUB@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUT@@@8" to i8*), i32 1) 45 // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* 46 // CHECK-NEXT: ret %struct.T* [[RET]] 47 48 T* test4(V* x) { return dynamic_cast<T*>(x); } 49 // CHECK-LABEL: define %struct.T* @"\01?test4@@YAPAUT@@PAUV@@@Z"(%struct.V* %x) 50 // CHECK: [[CAST:%.*]] = bitcast %struct.V* %x to i8* 51 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[CAST]], i32 0, i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUV@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUT@@@8" to i8*), i32 0) 52 // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* 53 // CHECK-NEXT: ret %struct.T* [[RET]] 54 55 T* test5(A* x) { return dynamic_cast<T*>(x); } 56 // CHECK-LABEL: define %struct.T* @"\01?test5@@YAPAUT@@PAUA@@@Z"(%struct.A* %x) 57 // CHECK: [[CHECK:%.*]] = icmp eq %struct.A* %x, null 58 // CHECK-NEXT: br i1 [[CHECK]] 59 // CHECK: [[VOIDP:%.*]] = bitcast %struct.A* %x to i8* 60 // CHECK-NEXT: [[BITCAST:%.*]] = bitcast %struct.A* %x to i8** 61 // CHECK-NEXT: [[VBTBL:%.*]] = load i8** [[BITCAST]], align 4 62 // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i8* [[VBTBL]], i32 4 63 // CHECK-NEXT: [[VBOFFPCAST:%.*]] = bitcast i8* [[VBOFFP]] to i32* 64 // CHECK-NEXT: [[VBOFFS:%.*]] = load i32* [[VBOFFPCAST:%.*]], align 4 65 // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8* [[VOIDP]], i32 [[VBOFFS]] 66 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[ADJ]], i32 [[VBOFFS]], i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUA@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUT@@@8" to i8*), i32 0) 67 // CHECK-NEXT: [[RES:%.*]] = bitcast i8* [[CALL]] to %struct.T* 68 // CHECK-NEXT: br label 69 // CHECK: [[RET:%.*]] = phi %struct.T* 70 // CHECK-NEXT: ret %struct.T* [[RET]] 71 72 T* test6(B* x) { return dynamic_cast<T*>(x); } 73 // CHECK-LABEL: define %struct.T* @"\01?test6@@YAPAUT@@PAUB@@@Z"(%struct.B* %x) 74 // CHECK: [[CHECK:%.*]] = icmp eq %struct.B* %x, null 75 // CHECK-NEXT: br i1 [[CHECK]] 76 // CHECK: [[CAST:%.*]] = getelementptr inbounds %struct.B* %x, i32 0, i32 0, i32 0 77 // CHECK-NEXT: [[VBPTR:%.*]] = getelementptr inbounds i8* [[CAST]], i32 4 78 // CHECK-NEXT: [[BITCAST:%.*]] = bitcast i8* [[VBPTR]] to i8** 79 // CHECK-NEXT: [[VBTBL:%.*]] = load i8** [[BITCAST]], align 4 80 // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i8* [[VBTBL]], i32 4 81 // CHECK-NEXT: [[VBOFFPCAST:%.*]] = bitcast i8* [[VBOFFP]] to i32* 82 // CHECK-NEXT: [[VBOFFS:%.*]] = load i32* [[VBOFFPCAST:%.*]], align 4 83 // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 84 // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8* [[CAST]], i32 [[DELTA]] 85 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[ADJ]], i32 [[DELTA]], i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUB@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"\01??_R0?AUT@@@8" to i8*), i32 0) 86 // CHECK-NEXT: [[RES:%.*]] = bitcast i8* [[CALL]] to %struct.T* 87 // CHECK-NEXT: br label 88 // CHECK: [[RET:%.*]] = phi %struct.T* 89 // CHECK-NEXT: ret %struct.T* [[RET]] 90 91 void* test7(V* x) { return dynamic_cast<void*>(x); } 92 // CHECK-LABEL: define i8* @"\01?test7@@YAPAXPAUV@@@Z"(%struct.V* %x) 93 // CHECK: [[CAST:%.*]] = bitcast %struct.V* %x to i8* 94 // CHECK-NEXT: [[RET:%.*]] = tail call i8* @__RTCastToVoid(i8* [[CAST]]) 95 // CHECK-NEXT: ret i8* [[RET]] 96 97 void* test8(A* x) { return dynamic_cast<void*>(x); } 98 // CHECK-LABEL: define i8* @"\01?test8@@YAPAXPAUA@@@Z"(%struct.A* %x) 99 // CHECK: [[CHECK:%.*]] = icmp eq %struct.A* %x, null 100 // CHECK-NEXT: br i1 [[CHECK]] 101 // CHECK: [[VOIDP:%.*]] = bitcast %struct.A* %x to i8* 102 // CHECK-NEXT: [[BITCAST:%.*]] = bitcast %struct.A* %x to i8** 103 // CHECK-NEXT: [[VBTBL:%.*]] = load i8** [[BITCAST]], align 4 104 // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i8* [[VBTBL]], i32 4 105 // CHECK-NEXT: [[VBOFFPCAST:%.*]] = bitcast i8* [[VBOFFP]] to i32* 106 // CHECK-NEXT: [[VBOFFS:%.*]] = load i32* [[VBOFFPCAST:%.*]], align 4 107 // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8* [[VOIDP]], i32 [[VBOFFS]] 108 // CHECK-NEXT: [[RES:%.*]] = tail call i8* @__RTCastToVoid(i8* [[ADJ]]) 109 // CHECK-NEXT: br label 110 // CHECK: [[RET:%.*]] = phi i8* 111 // CHECK-NEXT: ret i8* [[RET]] 112 113 void* test9(B* x) { return dynamic_cast<void*>(x); } 114 // CHECK-LABEL: define i8* @"\01?test9@@YAPAXPAUB@@@Z"(%struct.B* %x) 115 // CHECK: [[CHECK:%.*]] = icmp eq %struct.B* %x, null 116 // CHECK-NEXT: br i1 [[CHECK]] 117 // CHECK: [[CAST:%.*]] = getelementptr inbounds %struct.B* %x, i32 0, i32 0, i32 0 118 // CHECK-NEXT: [[VBPTR:%.*]] = getelementptr inbounds i8* [[CAST]], i32 4 119 // CHECK-NEXT: [[BITCAST:%.*]] = bitcast i8* [[VBPTR]] to i8** 120 // CHECK-NEXT: [[VBTBL:%.*]] = load i8** [[BITCAST]], align 4 121 // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i8* [[VBTBL]], i32 4 122 // CHECK-NEXT: [[VBOFFPCAST:%.*]] = bitcast i8* [[VBOFFP]] to i32* 123 // CHECK-NEXT: [[VBOFFS:%.*]] = load i32* [[VBOFFPCAST:%.*]], align 4 124 // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 125 // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8* [[CAST]], i32 [[DELTA]] 126 // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTCastToVoid(i8* [[ADJ]]) 127 // CHECK-NEXT: br label 128 // CHECK: [[RET:%.*]] = phi i8* 129 // CHECK-NEXT: ret i8* [[RET]] 130 131
