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