derek.holloway
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28 lines
1.3 KiB
C++
28 lines
1.3 KiB
C++
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
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// PR48030
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template<typename T> struct TLS { static thread_local T *mData; };
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inline decltype(nullptr) non_constant_initializer() { return nullptr; }
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template<typename T> thread_local T *TLS<T>::mData = non_constant_initializer();
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struct S {};
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S *current() { return TLS<S>::mData; };
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// CHECK-DAG: @_ZN3TLSI1SE5mDataE = linkonce_odr thread_local global {{.*}}, comdat,
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// CHECK-DAG: @_ZGVN3TLSI1SE5mDataE = linkonce_odr thread_local global {{.*}}, comdat($_ZN3TLSI1SE5mDataE),
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// CHECK-DAG: @_ZTHN3TLSI1SE5mDataE = linkonce_odr alias {{.*}} @__cxx_global_var_init
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// CHECK-LABEL: define {{.*}} @_Z7currentv()
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// CHECK: call {{.*}} @_ZTWN3TLSI1SE5mDataE()
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// CHECK-LABEL: define weak_odr hidden {{.*}} @_ZTWN3TLSI1SE5mDataE() {{.*}} comdat {
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// CHECK: call void @_ZTHN3TLSI1SE5mDataE()
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// CHECK: [[TLSmData_ADDR:%[^ ]+]] = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_ZN3TLSI1SE5mDataE)
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// CHECK: ret {{.*}} [[TLSmData_ADDR]]
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// Unlike for a global, the global initialization function must not be in a
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// COMDAT with the variable, because it is referenced from the _ZTH function
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// which is outside that COMDAT.
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//
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// CHECK-NOT: define {{.*}} @__cxx_global_var_init{{.*}}comdat
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