28 lines · cpp
1// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s2 3// PR480304 5template<typename T> struct TLS { static thread_local T *mData; };6inline decltype(nullptr) non_constant_initializer() { return nullptr; }7template<typename T> thread_local T *TLS<T>::mData = non_constant_initializer();8struct S {};9S *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_init14 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 a24// COMDAT with the variable, because it is referenced from the _ZTH function25// which is outside that COMDAT.26//27// CHECK-NOT: define {{.*}} @__cxx_global_var_init{{.*}}comdat28