forked from OSchip/llvm-project
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
// RUN: %clang_cc1 -std=c++1z %s -emit-llvm -o - -triple x86_64-linux-gnu | FileCheck %s
|
|
|
|
struct Q {
|
|
// CHECK: @_ZN1Q1kE = linkonce_odr constant i32 5, comdat
|
|
static constexpr int k = 5;
|
|
};
|
|
const int &r = Q::k;
|
|
|
|
int f();
|
|
|
|
// const does not imply internal linkage.
|
|
// CHECK: @external_inline = linkonce_odr constant i32 5, comdat
|
|
inline const int external_inline = 5;
|
|
const int &use1 = external_inline;
|
|
|
|
// static still does, though.
|
|
// CHECK: @_ZL15internal_inline = internal constant i32 5
|
|
static inline const int internal_inline = 5;
|
|
const int &use2 = internal_inline;
|
|
|
|
int a = f();
|
|
// CHECK: @b = linkonce_odr global i32 0, comdat
|
|
// CHECK: @_ZGV1b = linkonce_odr global i64 0, comdat($b)
|
|
inline int b = f();
|
|
int c = f();
|
|
|
|
// For compatibility with C++11 and C++14, an out-of-line declaration of a
|
|
// static constexpr local variable promotes the variable to weak_odr.
|
|
struct compat {
|
|
static constexpr int a = 1;
|
|
static constexpr int b = 2;
|
|
static constexpr int c = 3;
|
|
static inline constexpr int d = 4;
|
|
static const int e = 5;
|
|
static const int f = 6;
|
|
static const int g = 7;
|
|
};
|
|
const int &compat_use_before_redecl = compat::b;
|
|
const int compat::a;
|
|
const int compat::b;
|
|
const int compat::c;
|
|
const int compat::d;
|
|
const int compat::e;
|
|
constexpr int compat::f;
|
|
constexpr inline int compat::g;
|
|
const int &compat_use_after_redecl1 = compat::c;
|
|
const int &compat_use_after_redecl2 = compat::d;
|
|
const int &compat_use_after_redecl3 = compat::g;
|
|
// CHECK-DAG: @_ZN6compat1bE = weak_odr constant i32 2
|
|
// CHECK-DAG: @_ZN6compat1aE = weak_odr constant i32 1
|
|
// CHECK-DAG: @_ZN6compat1cE = weak_odr constant i32 3
|
|
// CHECK-DAG: @_ZN6compat1dE = linkonce_odr constant i32 4
|
|
// CHECK-DAG: @_ZN6compat1eE ={{.*}} constant i32 5
|
|
// CHECK-DAG: @_ZN6compat1fE = weak_odr constant i32 6
|
|
// CHECK-DAG: @_ZN6compat1gE = linkonce_odr constant i32 7
|
|
|
|
template<typename T> struct X {
|
|
static int a;
|
|
static inline int b;
|
|
static int c;
|
|
static const int d;
|
|
static int e;
|
|
};
|
|
// CHECK: @_ZN1XIiE1aE = linkonce_odr global i32 10
|
|
// CHECK: @_ZN1XIiE1bE ={{.*}} global i32 20
|
|
// CHECK-NOT: @_ZN1XIiE1cE
|
|
// CHECK: @_ZN1XIiE1dE = linkonce_odr constant i32 40
|
|
// CHECK: @_ZN1XIiE1eE = linkonce_odr global i32 50
|
|
template<> inline int X<int>::a = 10;
|
|
int &use3 = X<int>::a;
|
|
template<> int X<int>::b = 20;
|
|
template<> inline int X<int>::c = 30;
|
|
template<typename T> constexpr int X<T>::d = 40;
|
|
template<typename T> inline int X<T>::e = 50;
|
|
const int *use_x_int_d = &X<int>::d;
|
|
const int *use_x_int_e = &X<int>::e;
|
|
|
|
template<typename T> struct Y;
|
|
template<> struct Y<int> {
|
|
static constexpr int a = 123;
|
|
static constexpr int b = 456;
|
|
static constexpr int c = 789;
|
|
};
|
|
// CHECK: @_ZN1YIiE1aE = weak_odr constant i32 123
|
|
constexpr int Y<int>::a;
|
|
// CHECK: @_ZN1YIiE1bE = linkonce_odr constant i32 456
|
|
const int &yib = Y<int>::b;
|
|
// CHECK-NOT: @_ZN1YIiE1cE
|
|
|
|
// CHECK-LABEL: define {{.*}}global_var_init
|
|
// CHECK: call noundef i32 @_Z1fv
|
|
|
|
// CHECK-LABEL: define {{.*}}global_var_init{{.*}} comdat($b)
|
|
// CHECK: load atomic {{.*}} acquire, align
|
|
// CHECK: br
|
|
// CHECK: __cxa_guard_acquire(i64* @_ZGV1b)
|
|
// CHECK: br
|
|
// CHECK: call noundef i32 @_Z1fv
|
|
// CHECK: __cxa_guard_release(i64* @_ZGV1b)
|
|
|
|
// CHECK-LABEL: define {{.*}}global_var_init
|
|
// CHECK: call noundef i32 @_Z1fv
|
|
|
|
template<typename T> inline int d = f();
|
|
int e = d<int>;
|
|
|
|
// CHECK-LABEL: define {{.*}}global_var_init{{.*}}comdat
|
|
// CHECK: _ZGV1dIiE
|
|
// CHECK-NOT: __cxa_guard_acquire(i64* @_ZGV1b)
|
|
// CHECK: call noundef i32 @_Z1fv
|
|
// CHECK-NOT: __cxa_guard_release(i64* @_ZGV1b)
|
|
|
|
namespace PR35599 {
|
|
struct Marker1 {};
|
|
struct Marker2 {};
|
|
|
|
template <typename>
|
|
struct Foo {
|
|
struct Bar { Bar(); };
|
|
inline static Bar bar;
|
|
};
|
|
|
|
void run() {
|
|
// All we want here are ODR uses. Anything that requires that the type is
|
|
// complete is uninteresting.
|
|
#pragma clang diagnostic push
|
|
#pragma clang diagnostic ignored "-Wunused-value"
|
|
Foo<Marker1>::bar;
|
|
#pragma clang diagnostic pop
|
|
static_cast<void>(Foo<Marker2>::bar);
|
|
}
|
|
|
|
// CHECK-LABEL: define {{.*}}global_var_init{{.*}}comdat
|
|
// CHECK: call void @_ZN7PR355993FooINS_7Marker1EE3BarC1Ev
|
|
// CHECK-LABEL: define {{.*}}global_var_init{{.*}}comdat
|
|
// CHECK: call void @_ZN7PR355993FooINS_7Marker2EE3BarC1Ev
|
|
}
|