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
| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++1y -O1 -disable-llvm-passes %s -o - | FileCheck %s -check-prefix=CHECKA -check-prefix=CHECK
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++1y -O1 -disable-llvm-passes -fcxx-exceptions %s -o - | FileCheck %s -check-prefix=CHECKB -check-prefix=CHECK
// expected-no-diagnostics
// The variable template specialization x<Foo> generated in each file
// should be 'internal global' and not 'linkonce_odr global'.
template <typename T> int x = 42;
// CHECK-DAG: @_Z1xIiE = linkonce_odr global
// CHECK-DAG: @_Z1xIZL3foovE3FooE = internal global
// 'static' affects the linkage of the global
template <typename T> static int y = 42;
// CHECK-DAG: @_ZL1yIiE = internal global
// CHECK-DAG: @_ZL1yIZL3foovE3FooE = internal global
// 'const' does not
template <typename T> const int z = 42;
// CHECK-DAG: @_Z1zIiE = linkonce_odr constant
// CHECK-DAG: @_Z1zIZL3foovE3FooE = internal constant
template <typename T> T t = 42;
// CHECK-DAG: @_Z1tIiE = linkonce_odr global
// CHECK-DAG: @_Z1tIKiE = linkonce_odr constant
int mode;
// CHECK-DAG: define internal dereferenceable(4) i32* @_ZL3foov(
static const int &foo() {
struct Foo { };
switch (mode) {
case 0:
// CHECK-DAG: @_Z1xIiE
return x<int>;
case 1:
// CHECK-DAG: @_Z1xIZL3foovE3FooE
return x<Foo>;
case 2:
// CHECK-DAG: @_ZL1yIiE
return y<int>;
case 3:
// CHECK-DAG: @_ZL1yIZL3foovE3FooE
return y<Foo>;
case 4:
// CHECK-DAG: @_Z1zIiE
return z<int>;
case 5:
// CHECK-DAG: @_Z1zIZL3foovE3FooE
return z<Foo>;
case 6:
// CHECK-DAG: @_Z1tIiE
return t<int>;
case 7:
// CHECK-DAG: @_Z1tIKiE
return t<const int>;
}
}
#if !__has_feature(cxx_exceptions) // File A
// CHECKA-DAG: define dereferenceable(4) i32* @_Z3barv(
const int &bar() {
// CHECKA-DAG: call dereferenceable(4) i32* @_ZL3foov()
return foo();
}
#else // File B
// CHECKB-DAG: declare dereferenceable(4) i32* @_Z3barv(
const int &bar();
int main() {
// CHECKB-DAG: call dereferenceable(4) i32* @_Z3barv()
// CHECKB-DAG: call dereferenceable(4) i32* @_ZL3foov()
&bar() == &foo() ? throw 0 : (void)0; // Should not throw exception at runtime.
}
#endif // end of Files A and B
|