1 | // RUN: %clang_cc1 -emit-llvm -O1 -o - -fexceptions -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 dso_local noalias %struct.T* @"?test0@@YAPAUT@@XZ"() |
11 | // CHECK: ret %struct.T* null |
12 | |
13 | T* test1(V* x) { return &dynamic_cast<T&>(*x); } |
14 | // CHECK-LABEL: define dso_local %struct.T* @"?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* @"??_R0?AUV@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"??_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 dso_local %struct.T* @"?test2@@YAPAUT@@PAUA@@@Z"(%struct.A* %x) |
22 | // CHECK: [[CAST:%.*]] = bitcast %struct.A* %x to i8* |
23 | // CHECK-NEXT: [[VBPTRPTR:%.*]] = getelementptr inbounds %struct.A, %struct.A* %x, i32 0, i32 0 |
24 | // CHECK-NEXT: [[VBTBL:%.*]] = load i32*, i32** [[VBPTRPTR]], align 4 |
25 | // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1 |
26 | // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, i32* [[VBOFFP]], align 4 |
27 | // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[CAST]], i32 [[VBOFFS]] |
28 | // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[ADJ]], i32 [[VBOFFS]], i8* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUA@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUT@@@8" to i8*), i32 1) |
29 | // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* |
30 | // CHECK-NEXT: ret %struct.T* [[RET]] |
31 | |
32 | T* test3(B* x) { return &dynamic_cast<T&>(*x); } |
33 | // CHECK-LABEL: define dso_local %struct.T* @"?test3@@YAPAUT@@PAUB@@@Z"(%struct.B* %x) |
34 | // CHECK: [[VOIDP:%.*]] = getelementptr inbounds %struct.B, %struct.B* %x, i32 0, i32 0, i32 0 |
35 | // CHECK-NEXT: [[VBPTR:%.*]] = getelementptr inbounds i8, i8* [[VOIDP]], i32 4 |
36 | // CHECK-NEXT: [[VBPTRPTR:%.*]] = bitcast i8* [[VBPTR:%.*]] to i32** |
37 | // CHECK-NEXT: [[VBTBL:%.*]] = load i32*, i32** [[VBPTRPTR]], align 4 |
38 | // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1 |
39 | // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, i32* [[VBOFFP]], align 4 |
40 | // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 |
41 | // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[VOIDP]], i32 [[DELTA]] |
42 | // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[ADJ]], i32 [[DELTA]], i8* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUB@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUT@@@8" to i8*), i32 1) |
43 | // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* |
44 | // CHECK-NEXT: ret %struct.T* [[RET]] |
45 | |
46 | T* test4(V* x) { return dynamic_cast<T*>(x); } |
47 | // CHECK-LABEL: define dso_local %struct.T* @"?test4@@YAPAUT@@PAUV@@@Z"(%struct.V* %x) |
48 | // CHECK: [[CAST:%.*]] = bitcast %struct.V* %x to i8* |
49 | // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* [[CAST]], i32 0, i8* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUV@@@8" to i8*), i8* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUT@@@8" to i8*), i32 0) |
50 | // CHECK-NEXT: [[RET:%.*]] = bitcast i8* [[CALL]] to %struct.T* |
51 | // CHECK-NEXT: ret %struct.T* [[RET]] |
52 | |
53 | T* test5(A* x) { return dynamic_cast<T*>(x); } |
54 | // CHECK-LABEL: define dso_local %struct.T* @"?test5@@YAPAUT@@PAUA@@@Z"(%struct.A* %x) |
55 | // CHECK: [[CHECK:%.*]] = icmp eq %struct.A* %x, null |
56 | // CHECK-NEXT: br i1 [[CHECK]] |
57 | // CHECK: [[VOIDP:%.*]] = bitcast %struct.A* %x to i8* |
58 | // CHECK-NEXT: [[VBPTRPTR:%.*]] = getelementptr inbounds %struct.A, %struct.A* %x, i32 0, i32 0 |
59 | // CHECK-NEXT: [[VBTBL:%.*]] = load i32*, i32** [[VBPTRPTR]], align 4 |
60 | // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1 |
61 | // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, i32* [[VBOFFP]], align 4 |
62 | // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[VOIDP]], i32 [[VBOFFS]] |
63 | // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* nonnull [[ADJ]], i32 [[VBOFFS]], i8* {{.*}}bitcast (%rtti.TypeDescriptor7* @"??_R0?AUA@@@8" to i8*), i8* {{.*}}bitcast (%rtti.TypeDescriptor7* @"??_R0?AUT@@@8" to i8*), i32 0) |
64 | // CHECK-NEXT: [[RES:%.*]] = bitcast i8* [[CALL]] to %struct.T* |
65 | // CHECK-NEXT: br label |
66 | // CHECK: [[RET:%.*]] = phi %struct.T* |
67 | // CHECK-NEXT: ret %struct.T* [[RET]] |
68 | |
69 | T* test6(B* x) { return dynamic_cast<T*>(x); } |
70 | // CHECK-LABEL: define dso_local %struct.T* @"?test6@@YAPAUT@@PAUB@@@Z"(%struct.B* %x) |
71 | // CHECK: [[CHECK:%.*]] = icmp eq %struct.B* %x, null |
72 | // CHECK-NEXT: br i1 [[CHECK]] |
73 | // CHECK: [[CAST:%.*]] = getelementptr inbounds %struct.B, %struct.B* %x, i32 0, i32 0, i32 0 |
74 | // CHECK-NEXT: [[VBPTR:%.*]] = getelementptr inbounds i8, i8* [[CAST]], i32 4 |
75 | // CHECK-NEXT: [[VBPTRPTR:%.*]] = bitcast i8* [[VBPTR]] to i32** |
76 | // CHECK-NEXT: [[VBTBL:%.*]] = load i32*, i32** [[VBPTRPTR]], align 4 |
77 | // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1 |
78 | // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, i32* [[VBOFFP]], align 4 |
79 | // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 |
80 | // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[CAST]], i32 [[DELTA]] |
81 | // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTDynamicCast(i8* nonnull [[ADJ]], i32 [[DELTA]], i8* {{.*}}bitcast (%rtti.TypeDescriptor7* @"??_R0?AUB@@@8" to i8*), i8* {{.*}}bitcast (%rtti.TypeDescriptor7* @"??_R0?AUT@@@8" to i8*), i32 0) |
82 | // CHECK-NEXT: [[RES:%.*]] = bitcast i8* [[CALL]] to %struct.T* |
83 | // CHECK-NEXT: br label |
84 | // CHECK: [[RET:%.*]] = phi %struct.T* |
85 | // CHECK-NEXT: ret %struct.T* [[RET]] |
86 | |
87 | void* test7(V* x) { return dynamic_cast<void*>(x); } |
88 | // CHECK-LABEL: define dso_local i8* @"?test7@@YAPAXPAUV@@@Z"(%struct.V* %x) |
89 | // CHECK: [[CAST:%.*]] = bitcast %struct.V* %x to i8* |
90 | // CHECK-NEXT: [[RET:%.*]] = tail call i8* @__RTCastToVoid(i8* [[CAST]]) |
91 | // CHECK-NEXT: ret i8* [[RET]] |
92 | |
93 | void* test8(A* x) { return dynamic_cast<void*>(x); } |
94 | // CHECK-LABEL: define dso_local i8* @"?test8@@YAPAXPAUA@@@Z"(%struct.A* %x) |
95 | // CHECK: [[CHECK:%.*]] = icmp eq %struct.A* %x, null |
96 | // CHECK-NEXT: br i1 [[CHECK]] |
97 | // CHECK: [[VOIDP:%.*]] = bitcast %struct.A* %x to i8* |
98 | // CHECK-NEXT: [[VBPTRPTR:%.*]] = getelementptr inbounds %struct.A, %struct.A* %x, i32 0, i32 0 |
99 | // CHECK-NEXT: [[VBTBL:%.*]] = load i32*, i32** [[VBPTRPTR]], align 4 |
100 | // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1 |
101 | // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, i32* [[VBOFFP]], align 4 |
102 | // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[VOIDP]], i32 [[VBOFFS]] |
103 | // CHECK-NEXT: [[RES:%.*]] = tail call i8* @__RTCastToVoid(i8* nonnull [[ADJ]]) |
104 | // CHECK-NEXT: br label |
105 | // CHECK: [[RET:%.*]] = phi i8* |
106 | // CHECK-NEXT: ret i8* [[RET]] |
107 | |
108 | void* test9(B* x) { return dynamic_cast<void*>(x); } |
109 | // CHECK-LABEL: define dso_local i8* @"?test9@@YAPAXPAUB@@@Z"(%struct.B* %x) |
110 | // CHECK: [[CHECK:%.*]] = icmp eq %struct.B* %x, null |
111 | // CHECK-NEXT: br i1 [[CHECK]] |
112 | // CHECK: [[CAST:%.*]] = getelementptr inbounds %struct.B, %struct.B* %x, i32 0, i32 0, i32 0 |
113 | // CHECK-NEXT: [[VBPTR:%.*]] = getelementptr inbounds i8, i8* [[CAST]], i32 4 |
114 | // CHECK-NEXT: [[VBPTRPTR:%.*]] = bitcast i8* [[VBPTR]] to i32** |
115 | // CHECK-NEXT: [[VBTBL:%.*]] = load i32*, i32** [[VBPTRPTR]], align 4 |
116 | // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1 |
117 | // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, i32* [[VBOFFP]], align 4 |
118 | // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 |
119 | // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[CAST]], i32 [[DELTA]] |
120 | // CHECK-NEXT: [[CALL:%.*]] = tail call i8* @__RTCastToVoid(i8* nonnull [[ADJ]]) |
121 | // CHECK-NEXT: br label |
122 | // CHECK: [[RET:%.*]] = phi i8* |
123 | // CHECK-NEXT: ret i8* [[RET]] |
124 | |
125 | namespace PR25606 { |
126 | struct Cleanup { |
127 | ~Cleanup(); |
128 | }; |
129 | struct S1 { virtual ~S1(); }; |
130 | struct S2 : virtual S1 {}; |
131 | struct S3 : S2 {}; |
132 | |
133 | S3 *f(S2 &s) { |
134 | Cleanup c; |
135 | return dynamic_cast<S3 *>(&s); |
136 | } |
137 | // CHECK-LABEL: define dso_local %"struct.PR25606::S3"* @"?f@PR25606@@YAPAUS3@1@AAUS2@1@@Z"( |
138 | // CHECK: [[CALL:%.*]] = invoke i8* @__RTDynamicCast |
139 | |
140 | // CHECK: [[BC:%.*]] = bitcast i8* [[CALL]] to %"struct.PR25606::S3"* |
141 | // CHECK: call x86_thiscallcc void @"??1Cleanup@PR25606@@QAE@XZ"( |
142 | // CHECK: ret %"struct.PR25606::S3"* [[BC]] |
143 | } |
144 | |