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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
| // RUN: %clang_cc1 -Wno-microsoft -fno-rtti -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 | FileCheck %s
struct U;
static_assert(sizeof(void (U::*)()) == 2 * sizeof(void*) + 2 * sizeof(int), "");
struct A { int a; };
struct B { int b; };
struct I { union { struct { int a, b; }; }; };
struct S { int a, b; void f(); virtual void g(); };
struct M : A, B { int a, b; void f(); virtual void g(); };
struct V : virtual A { int a, b; void f(); virtual void g(); };
struct U { int a, b; void f(); virtual void g(); };
struct C { virtual void f(); };
struct D { virtual void g(); };
struct O : C, D { virtual void g(); }; // override of non-primary
// Test data member pointers.
template <typename T, int T::*F>
int ReadField(T &o) {
return F ? o.*F : 0;
}
// Redeclare some of the classes so that the implicit attribute goes on the most
// recent redeclaration rather than the definition.
struct V;
void ReadFields() {
A a;
I i;
S s;
M m;
V v;
U u;
ReadField<S, &S::a>(s);
ReadField<M, &M::a>(m);
ReadField<V, &V::a>(v);
ReadField<U, &U::a>(u);
ReadField<S, &S::b>(s);
ReadField<M, &M::b>(m);
ReadField<V, &V::b>(v);
ReadField<U, &U::b>(u);
ReadField<S, nullptr>(s);
ReadField<M, nullptr>(m);
ReadField<V, nullptr>(v);
ReadField<U, nullptr>(u);
// Non-polymorphic null data memptr vs first field memptr.
ReadField<A, &A::a>(a);
ReadField<A, nullptr>(a);
// Indirect fields injected from anonymous unions and structs
ReadField<I, &I::a>(i);
ReadField<I, &I::b>(i);
}
// CHECK-LABEL: define {{.*}}ReadFields
// CHECK: call {{.*}} @"??$ReadField@US@@$03@@YAHAAUS@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UM@@$0M@@@YAHAAUM@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UV@@$F7A@@@YAHAAUV@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UU@@$G3A@A@@@YAHAAUU@@@Z"
// CHECK: call {{.*}} @"??$ReadField@US@@$07@@YAHAAUS@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UM@@$0BA@@@YAHAAUM@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UV@@$FM@A@@@YAHAAUV@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UU@@$G7A@A@@@YAHAAUU@@@Z"
// MSVC mangles null member pointers in function templates wrong, but it gets
// them right in class templates.
// CHECK: call {{.*}} @"??$ReadField@US@@$0A@@@YAHAAUS@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UM@@$0A@@@YAHAAUM@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UV@@$0A@@@YAHAAUV@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UU@@$0A@@@YAHAAUU@@@Z"
// Non-polymorphic null data memptr vs first field memptr. MSVC mangles these
// the same.
// CHECK: call {{.*}} @"??$ReadField@UA@@$0A@@@YAHAAUA@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UA@@$0?0@@YAHAAUA@@@Z"
// Indirect fields are handled as-if they were simply members of their enclosing
// record.
// CHECK: call {{.*}} @"??$ReadField@UI@@$0A@@@YAHAAUI@@@Z"
// CHECK: call {{.*}} @"??$ReadField@UI@@$03@@YAHAAUI@@@Z"
// Test member function pointers.
template <typename T, void (T::*MFP)()>
void CallMethod(T &o) {
(o.*MFP)();
}
void CallMethods() {
S s;
M m;
V v;
U u;
O o;
// Non-virtual methods.
CallMethod<S, &S::f>(s);
CallMethod<M, &M::f>(m);
CallMethod<V, &V::f>(v);
CallMethod<U, &U::f>(u);
// Virtual methods requiring thunk mangling.
CallMethod<S, &S::g>(s);
CallMethod<M, &M::g>(m);
CallMethod<V, &V::g>(v);
CallMethod<U, &U::g>(u);
// A member pointer for a non-primary vbase will have a non-zero this
// adjustment.
CallMethod<O, &O::g>(o);
// Null member pointers.
CallMethod<S, nullptr>(s);
CallMethod<M, nullptr>(m);
CallMethod<V, nullptr>(v);
CallMethod<U, nullptr>(u);
}
// CHECK-LABEL: define {{.*}}CallMethods
// CHECK: call {{.*}} @"??$CallMethod@US@@$1?f@1@QAEXXZ@@YAXAAUS@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UM@@$H?f@1@QAEXXZA@@@YAXAAUM@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UV@@$I?f@1@QAEXXZA@A@@@YAXAAUV@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UU@@$J?f@1@QAEXXZA@A@A@@@YAXAAUU@@@Z"
// PR17034: MSVC reuses the same thunk for every virtual g method because they
// are all at vftable offset zero. They then mangle the name of the first thunk
// created into the name of the template instantiation, which is definitely a
// bug. We don't follow them here. Instead of ?_91@ backref below, they would
// get ?_9S@@ in every instantiation after the first.
// CHECK: call {{.*}} @"??$CallMethod@US@@$1??_91@$BA@AE@@YAXAAUS@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UM@@$H??_91@$BA@AEA@@@YAXAAUM@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UV@@$I??_91@$BA@AEA@A@@@YAXAAUV@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UU@@$J??_91@$BA@AEA@A@A@@@YAXAAUU@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UO@@$H??_91@$BA@AE3@@YAXAAUO@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@US@@$0A@@@YAXAAUS@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UM@@$0A@@@YAXAAUM@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UV@@$0A@@@YAXAAUV@@@Z"
// CHECK: call {{.*}} @"??$CallMethod@UU@@$0A@@@YAXAAUU@@@Z"
namespace NegativeNVOffset {
struct A {};
struct B : virtual A {};
struct C : B {
virtual void f();
};
}
template void CallMethod<NegativeNVOffset::C, &NegativeNVOffset::C::f>(NegativeNVOffset::C &);
// CHECK-LABEL: define {{.*}} @"??$CallMethod@UC@NegativeNVOffset@@$I??_912@$BA@AEPPPPPPPM@A@@@YAXAAUC@NegativeNVOffset@@@Z"
|