| // 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($b) |
| inline int b = f(); |
| int c = f(); |
| |
| // For compatibility with C++11 and C++14, an out-of-line declaration of a |
| // static constexpr local variable promotes the variable to weak_odr. |
| struct compat { |
| static constexpr int a = 1; |
| static constexpr int b = 2; |
| static constexpr int c = 3; |
| static inline constexpr int d = 4; |
| }; |
| const int &compat_use_before_redecl = compat::b; |
| const int compat::a; |
| const int compat::b; |
| const int compat::c; |
| const int compat::d; |
| const int &compat_use_after_redecl1 = compat::c; |
| const int &compat_use_after_redecl2 = compat::d; |
| // CHECK: @_ZN6compat1bE = weak_odr constant i32 2 |
| // CHECK: @_ZN6compat1aE = weak_odr constant i32 1 |
| // CHECK: @_ZN6compat1cE = weak_odr constant i32 3 |
| // CHECK: @_ZN6compat1dE = linkonce_odr constant i32 4 |
| |
| template<typename T> struct X { |
| static int a; |
| static inline int b; |
| static int c; |
| }; |
| // CHECK: @_ZN1XIiE1aE = linkonce_odr global i32 10 |
| // CHECK: @_ZN1XIiE1bE = global i32 20 |
| // CHECK-NOT: @_ZN1XIiE1cE |
| template<> inline int X<int>::a = 10; |
| int &use3 = X<int>::a; |
| template<> int X<int>::b = 20; |
| template<> inline int X<int>::c = 30; |
| |
| // CHECK-LABEL: define {{.*}}global_var_init |
| // CHECK: call i32 @_Z1fv |
| |
| // CHECK-LABEL: define {{.*}}global_var_init |
| // CHECK-NOT: comdat |
| // CHECK-SAME: {{$}} |
| // CHECK: load atomic {{.*}} acquire |
| // CHECK: br |
| // CHECK: __cxa_guard_acquire(i64* @_ZGV1b) |
| // CHECK: br |
| // CHECK: call i32 @_Z1fv |
| // CHECK: __cxa_guard_release(i64* @_ZGV1b) |
| |
| // CHECK-LABEL: define {{.*}}global_var_init |
| // CHECK: call 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 i32 @_Z1fv |
| // CHECK-NOT: __cxa_guard_release(i64* @_ZGV1b) |
