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
| // RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck -check-prefix=CHECK-GLOBALS %s
// __cxa_guard_acquire argument is 64-bit
// rdar://11540122
struct A {
A();
};
void f() {
// CHECK: call i32 @__cxa_guard_acquire(i64*
static A a;
}
// ARM64 uses the C++11 definition of POD.
// rdar://12650514
namespace test1 {
// This class is POD in C++11 and cannot have objects allocated in
// its tail-padding.
struct ABase {};
struct A : ABase {
int x;
char c;
};
struct B : A {
char d;
};
int test() {
return sizeof(B);
}
// CHECK: define i32 @_ZN5test14testEv()
// CHECK: ret i32 12
}
namespace std {
class type_info;
}
// ARM64 uses string comparisons for what would otherwise be
// default-visibility weak RTTI. rdar://12650568
namespace test2 {
struct A {
virtual void foo();
};
void A::foo() {}
// CHECK-GLOBALS-DAG: @_ZTSN5test21AE = constant [11 x i8]
// CHECK-GLOBALS-DAG: @_ZTIN5test21AE = constant { {{.*}}, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTSN5test21AE, i32 0, i32 0) }
struct __attribute__((visibility("hidden"))) B {};
const std::type_info &b0 = typeid(B);
// CHECK-GLOBALS-DAG: @_ZTSN5test21BE = linkonce_odr hidden constant
// CHECK-GLOBALS-DAG: @_ZTIN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTSN5test21BE, i32 0, i32 0) }
const std::type_info &b1 = typeid(B*);
// CHECK-GLOBALS-DAG: @_ZTSPN5test21BE = linkonce_odr hidden constant
// CHECK-GLOBALS-DAG: @_ZTIPN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @_ZTSPN5test21BE, i32 0, i32 0), i32 0, i8* bitcast
struct C {};
const std::type_info &c0 = typeid(C);
// CHECK-GLOBALS-DAG: @_ZTSN5test21CE = linkonce_odr hidden constant
// CHECK-GLOBALS-DAG: @_ZTIN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([11 x i8]* @_ZTSN5test21CE to i64), i64 -9223372036854775808) to i8*) }
const std::type_info &c1 = typeid(C*);
// CHECK-GLOBALS-DAG: @_ZTSPN5test21CE = linkonce_odr hidden constant
// CHECK-GLOBALS-DAG: @_ZTIPN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([12 x i8]* @_ZTSPN5test21CE to i64), i64 -9223372036854775808) to i8*), i32 0, i8* bitcast
// This class is explicitly-instantiated, but that instantiation
// doesn't guarantee to emit RTTI, so we can still demote the visibility.
template <class T> class D {};
template class D<int>;
const std::type_info &d0 = typeid(D<int>);
// CHECK-GLOBALS-DAG: @_ZTSN5test21DIiEE = linkonce_odr hidden constant
// CHECK-GLOBALS-DAG: @_ZTIN5test21DIiEE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21DIiEE to i64), i64 -9223372036854775808) to i8*) }
// This class is explicitly-instantiated and *does* guarantee to
// emit RTTI, so we're stuck with having to use default visibility.
template <class T> class E {
virtual void foo() {}
};
template class E<int>;
// CHECK-GLOBALS-DAG: @_ZTSN5test21EIiEE = weak_odr constant [14 x i8]
// CHECK-GLOBALS-DAG: @_ZTIN5test21EIiEE = weak_odr constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21EIiEE to i64), i64 -9223372036854775808) to i8*) }
}
// ARM64 reserves the top half of the vtable offset in virtual
// member pointers.
namespace test3 {
struct A {
virtual void foo();
virtual void bar();
};
// The offset half of the pointer is still initialized to zero.
// CHECK-GLOBALS-DAG: @_ZN5test34mptrE = global { i64, i64 } { i64 0, i64 1 }
void (A::*mptr)() = &A::foo;
// CHECK-LABEL: define void @_ZN5test34testEv()
// CHECK: [[TEMP:%.*]] = alloca [[A:.*]], align 8
// CHECK: [[MEMPTR:%.*]] = load { i64, i64 }, { i64, i64 }* @_ZN5test34mptrE, align 8
// CHECK: [[ADJUST_AND_IS_VIRTUAL:%.*]] = extractvalue { i64, i64 } [[MEMPTR]], 1
// CHECK: [[ADJUST:%.*]] = ashr i64 [[ADJUST_AND_IS_VIRTUAL]], 1
// CHECK: [[T0:%.*]] = bitcast [[A]]* [[TEMP]] to i8*
// CHECK: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i64 [[ADJUST]]
// CHECK: [[ADJUSTED:%.*]] = bitcast i8* [[T1]] to [[A]]*
// CHECK: [[MEMBER:%.*]] = extractvalue { i64, i64 } [[MEMPTR]], 0
// CHECK: [[T0:%.*]] = and i64 [[ADJUST_AND_IS_VIRTUAL]], 1
// CHECK: [[IS_VIRTUAL:%.*]] = icmp ne i64 [[T0]], 0
// CHECK: br i1 [[IS_VIRTUAL]],
// CHECK: [[T0:%.*]] = bitcast [[A]]* [[ADJUSTED]] to i8**
// CHECK: [[VPTR:%.*]] = load i8*, i8** [[T0]], align 8
// CHECK: [[TRUNC:%.*]] = trunc i64 [[MEMBER]] to i32
// CHECK: [[ZEXT:%.*]] = zext i32 [[TRUNC]] to i64
// CHECK: [[T0:%.*]] = getelementptr i8, i8* [[VPTR]], i64 [[ZEXT]]
// CHECK: [[T1:%.*]] = bitcast i8* [[T0]] to void ([[A]]*)**
// CHECK: load void ([[A]]*)*, void ([[A]]*)** [[T1]],
void test() {
(A().*mptr)();
}
}
|