1// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s 2 3int f(); 4int g(); 5 6// CHECK: @a = thread_local global i32 0 7thread_local int a = f(); 8extern thread_local int b; 9// CHECK: @c = global i32 0 10int c = b; 11// CHECK: @_ZL1d = internal thread_local global i32 0 12static thread_local int d = g(); 13 14struct U { static thread_local int m; }; 15// CHECK: @_ZN1U1mE = thread_local global i32 0 16thread_local int U::m = f(); 17 18template<typename T> struct V { static thread_local int m; }; 19template<typename T> thread_local int V<T>::m = g(); 20 21// CHECK: @e = global i32 0 22int e = V<int>::m; 23 24// CHECK: @_ZN1VIiE1mE = weak_odr thread_local global i32 0 25 26// CHECK: @_ZZ1fvE1n = internal thread_local global i32 0 27 28// CHECK: @_ZGVZ1fvE1n = internal thread_local global i8 0 29 30// CHECK: @_ZZ8tls_dtorvE1s = internal thread_local global 31// CHECK: @_ZGVZ8tls_dtorvE1s = internal thread_local global i8 0 32 33// CHECK: @_ZZ8tls_dtorvE1t = internal thread_local global 34// CHECK: @_ZGVZ8tls_dtorvE1t = internal thread_local global i8 0 35 36// CHECK: @_ZZ8tls_dtorvE1u = internal thread_local global 37// CHECK: @_ZGVZ8tls_dtorvE1u = internal thread_local global i8 0 38// CHECK: @_ZGRZ8tls_dtorvE1u = private thread_local global 39 40// CHECK: @_ZGVN1VIiE1mE = weak_odr thread_local global i64 0 41 42// CHECK: @__tls_guard = internal thread_local global i8 0 43 44// CHECK: @llvm.global_ctors = appending global {{.*}} @[[GLOBAL_INIT:[^ ]*]] 45 46// CHECK: @_ZTH1a = alias void ()* @__tls_init 47// CHECK: @_ZTHL1d = alias internal void ()* @__tls_init 48// CHECK: @_ZTHN1U1mE = alias void ()* @__tls_init 49// CHECK: @_ZTHN1VIiE1mE = alias weak_odr void ()* @__tls_init 50 51 52// Individual variable initialization functions: 53 54// CHECK: define {{.*}} @[[A_INIT:.*]]() 55// CHECK: call i32 @_Z1fv() 56// CHECK-NEXT: store i32 {{.*}}, i32* @a, align 4 57 58// CHECK: define i32 @_Z1fv() 59int f() { 60 // CHECK: %[[GUARD:.*]] = load i8* @_ZGVZ1fvE1n, align 1 61 // CHECK: %[[NEED_INIT:.*]] = icmp eq i8 %[[GUARD]], 0 62 // CHECK: br i1 %[[NEED_INIT]] 63 64 // CHECK: %[[CALL:.*]] = call i32 @_Z1gv() 65 // CHECK: store i32 %[[CALL]], i32* @_ZZ1fvE1n, align 4 66 // CHECK: store i8 1, i8* @_ZGVZ1fvE1n 67 // CHECK: br label 68 static thread_local int n = g(); 69 70 // CHECK: load i32* @_ZZ1fvE1n, align 4 71 return n; 72} 73 74// CHECK: define {{.*}} @[[C_INIT:.*]]() 75// CHECK: call i32* @_ZTW1b() 76// CHECK-NEXT: load i32* %{{.*}}, align 4 77// CHECK-NEXT: store i32 %{{.*}}, i32* @c, align 4 78 79// CHECK: define weak_odr hidden i32* @_ZTW1b() 80// CHECK: br i1 icmp ne (void ()* @_ZTH1b, void ()* null), 81// not null: 82// CHECK: call void @_ZTH1b() 83// CHECK: br label 84// finally: 85// CHECK: ret i32* @b 86 87// CHECK: define {{.*}} @[[D_INIT:.*]]() 88// CHECK: call i32 @_Z1gv() 89// CHECK-NEXT: store i32 %{{.*}}, i32* @_ZL1d, align 4 90 91// CHECK: define {{.*}} @[[U_M_INIT:.*]]() 92// CHECK: call i32 @_Z1fv() 93// CHECK-NEXT: store i32 %{{.*}}, i32* @_ZN1U1mE, align 4 94 95// CHECK: define {{.*}} @[[E_INIT:.*]]() 96// CHECK: call i32* @_ZTWN1VIiE1mE() 97// CHECK-NEXT: load i32* %{{.*}}, align 4 98// CHECK-NEXT: store i32 %{{.*}}, i32* @e, align 4 99 100// CHECK: define weak_odr hidden i32* @_ZTWN1VIiE1mE() 101// CHECK: call void @_ZTHN1VIiE1mE() 102// CHECK: ret i32* @_ZN1VIiE1mE 103 104 105struct S { S(); ~S(); }; 106struct T { ~T(); }; 107 108// CHECK: define void @_Z8tls_dtorv() 109void tls_dtor() { 110 // CHECK: load i8* @_ZGVZ8tls_dtorvE1s 111 // CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZZ8tls_dtorvE1s) 112 // CHECK: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZZ8tls_dtorvE1s{{.*}} @__dso_handle 113 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1s 114 static thread_local S s; 115 116 // CHECK: load i8* @_ZGVZ8tls_dtorvE1t 117 // CHECK-NOT: _ZN1T 118 // CHECK: call i32 @__cxa_thread_atexit({{.*}}@_ZN1TD1Ev {{.*}}@_ZZ8tls_dtorvE1t{{.*}} @__dso_handle 119 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1t 120 static thread_local T t; 121 122 // CHECK: load i8* @_ZGVZ8tls_dtorvE1u 123 // CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZGRZ8tls_dtorvE1u) 124 // CHECK: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZGRZ8tls_dtorvE1u{{.*}} @__dso_handle 125 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1u 126 static thread_local const S &u = S(); 127} 128 129// CHECK: declare i32 @__cxa_thread_atexit(void (i8*)*, i8*, i8*) 130 131// CHECK: define {{.*}} @_Z7PR15991v( 132int PR15991() { 133 thread_local int n; 134 auto l = [] { return n; }; 135 return l(); 136} 137 138// CHECK: define {{.*}} @[[V_M_INIT:.*]]() 139// CHECK: load i8* bitcast (i64* @_ZGVN1VIiE1mE to i8*) 140// CHECK: %[[V_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 141// CHECK: br i1 %[[V_M_INITIALIZED]], 142// need init: 143// CHECK: call i32 @_Z1gv() 144// CHECK: store i32 %{{.*}}, i32* @_ZN1VIiE1mE, align 4 145// CHECK: store i64 1, i64* @_ZGVN1VIiE1mE 146// CHECK: br label 147 148// CHECK: define {{.*}}@[[GLOBAL_INIT:.*]]() 149// CHECK: call void @[[C_INIT]]() 150// CHECK: call void @[[E_INIT]]() 151 152 153// CHECK: define {{.*}}@__tls_init() 154// CHECK: load i8* @__tls_guard 155// CHECK: %[[NEED_TLS_INIT:.*]] = icmp eq i8 %{{.*}}, 0 156// CHECK: store i8 1, i8* @__tls_guard 157// CHECK: br i1 %[[NEED_TLS_INIT]], 158// init: 159// CHECK: call void @[[A_INIT]]() 160// CHECK: call void @[[D_INIT]]() 161// CHECK: call void @[[U_M_INIT]]() 162// CHECK: call void @[[V_M_INIT]]() 163 164 165// CHECK: define weak_odr hidden i32* @_ZTW1a() { 166// CHECK: call void @_ZTH1a() 167// CHECK: ret i32* @a 168// CHECK: } 169 170 171// CHECK: declare extern_weak void @_ZTH1b() 172 173 174// CHECK: define internal hidden i32* @_ZTWL1d() 175// CHECK: call void @_ZTHL1d() 176// CHECK: ret i32* @_ZL1d 177 178// CHECK: define weak_odr hidden i32* @_ZTWN1U1mE() 179// CHECK: call void @_ZTHN1U1mE() 180// CHECK: ret i32* @_ZN1U1mE 181