1 // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
2
3 // PR48030
4
5 template<typename T> struct TLS { static thread_local T *mData; };
non_constant_initializer()6 inline decltype(nullptr) non_constant_initializer() { return nullptr; }
7 template<typename T> thread_local T *TLS<T>::mData = non_constant_initializer();
8 struct S {};
current()9 S *current() { return TLS<S>::mData; };
10
11 // CHECK-DAG: @_ZN3TLSI1SE5mDataE = linkonce_odr thread_local global {{.*}}, comdat,
12 // CHECK-DAG: @_ZGVN3TLSI1SE5mDataE = linkonce_odr thread_local global {{.*}}, comdat($_ZN3TLSI1SE5mDataE),
13 // CHECK-DAG: @_ZTHN3TLSI1SE5mDataE = linkonce_odr alias {{.*}} @__cxx_global_var_init
14
15 // CHECK-LABEL: define {{.*}} @_Z7currentv()
16 // CHECK: call {{.*}} @_ZTWN3TLSI1SE5mDataE()
17
18 // CHECK-LABEL: define weak_odr hidden {{.*}} @_ZTWN3TLSI1SE5mDataE() {{.*}} comdat {
19 // CHECK: call void @_ZTHN3TLSI1SE5mDataE()
20 // CHECK: [[TLSmData_ADDR:%[^ ]+]] = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_ZN3TLSI1SE5mDataE)
21 // CHECK: ret {{.*}} [[TLSmData_ADDR]]
22
23 // Unlike for a global, the global initialization function must not be in a
24 // COMDAT with the variable, because it is referenced from the _ZTH function
25 // which is outside that COMDAT.
26 //
27 // CHECK-NOT: define {{.*}} @__cxx_global_var_init{{.*}}comdat
28