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
|
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -o - %s | FileCheck %s
// CHECK: @_ZN5test11A1aE = constant i32 10, align 4
// CHECK: @_ZN5test212_GLOBAL__N_11AIiE1xE = internal global i32 0, align 4
// CHECK: @_ZN5test31AIiE1xE = weak_odr global i32 0, align 4
// CHECK: @_ZGVN5test31AIiE1xE = weak_odr global i64 0
// CHECK: _ZN5test51U2k0E = global i32 0
// CHECK: _ZN5test51U2k1E = global i32 0
// CHECK: _ZN5test51U2k2E = constant i32 76
// CHECK-NOT: test51U2k3E
// CHECK-NOT: test51U2k4E
// PR5564.
namespace test1 {
struct A {
static const int a = 10;
};
const int A::a;
struct S {
static int i;
};
void f() {
int a = S::i;
}
}
// Test that we don't use guards for initializing template static data
// members with internal linkage.
namespace test2 {
int foo();
namespace {
template <class T> struct A {
static int x;
};
template <class T> int A<T>::x = foo();
template struct A<int>;
}
// CHECK: define internal void @__cxx_global_var_init()
// CHECK: [[TMP:%.*]] = call i32 @_ZN5test23fooEv()
// CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test212_GLOBAL__N_11AIiE1xE, align 4
// CHECK-NEXT: ret void
}
// Test that we don't use threadsafe statics when initializing
// template static data members.
namespace test3 {
int foo();
template <class T> struct A {
static int x;
};
template <class T> int A<T>::x = foo();
template struct A<int>;
// CHECK: define internal void @__cxx_global_var_init1()
// CHECK: [[GUARDBYTE:%.*]] = load i8* bitcast (i64* @_ZGVN5test31AIiE1xE to i8*)
// CHECK-NEXT: [[UNINITIALIZED:%.*]] = icmp eq i8 [[GUARDBYTE]], 0
// CHECK-NEXT: br i1 [[UNINITIALIZED]]
// CHECK: [[TMP:%.*]] = call i32 @_ZN5test33fooEv()
// CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test31AIiE1xE, align 4
// CHECK-NEXT: store i64 1, i64* @_ZGVN5test31AIiE1xE
// CHECK-NEXT: br label
// CHECK: ret void
}
// Test that we can fold member lookup expressions which resolve to static data
// members.
namespace test4 {
struct A {
static const int n = 76;
};
int f(A *a) {
// CHECK: define i32 @_ZN5test41fEPNS_1AE
// CHECK: ret i32 76
return a->n;
}
}
// Test that static data members in unions behave properly.
namespace test5 {
union U {
static int k0;
static const int k1;
static const int k2 = 76;
static const int k3;
static const int k4 = 81;
};
int U::k0;
const int U::k1 = (k0 = 9, 42);
const int U::k2;
// CHECK: store i32 9, i32* @_ZN5test51U2k0E
// CHECK: store i32 {{.*}}, i32* @_ZN5test51U2k1E
// CHECK-NOT: store {{.*}} i32* @_ZN5test51U2k2E
}
|
