1 // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s 2 // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -O2 -disable-llvm-passes -o - -triple x86_64-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=LINUX --check-prefix=CHECK-OPT %s 3 // RUN: %clang_cc1 -std=c++11 -femulated-tls -emit-llvm %s -o - \ 4 // RUN: -triple x86_64-linux-gnu 2>&1 | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s 5 // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-apple-darwin12 | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s 6 7 // RUN: %clang_cc1 -std=c++11 -fno-use-cxa-atexit -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s 8 // RUN: %clang_cc1 -std=c++11 -fno-use-cxa-atexit -emit-llvm %s -O2 -disable-llvm-passes -o - -triple x86_64-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=LINUX --check-prefix=CHECK-OPT %s 9 // RUN: %clang_cc1 -std=c++11 -fno-use-cxa-atexit -femulated-tls -emit-llvm %s -o - \ 10 // RUN: -triple x86_64-linux-gnu 2>&1 | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s 11 // RUN: %clang_cc1 -std=c++11 -fno-use-cxa-atexit -emit-llvm %s -o - -triple x86_64-apple-darwin12 | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s 12 13 int f(); 14 int g(); 15 16 // LINUX-DAG: @a = thread_local global i32 0 17 // DARWIN-DAG: @a = internal thread_local global i32 0 18 thread_local int a = f(); 19 extern thread_local int b; 20 // CHECK-DAG: @c = global i32 0 21 int c = b; 22 // CHECK-DAG: @_ZL1d = internal thread_local global i32 0 23 static thread_local int d = g(); 24 25 struct U { static thread_local int m; }; 26 // LINUX-DAG: @_ZN1U1mE = thread_local global i32 0 27 // DARWIN-DAG: @_ZN1U1mE = internal thread_local global i32 0 28 thread_local int U::m = f(); 29 30 namespace MismatchedInitType { 31 // Check that we don't crash here when we're forced to create a new global 32 // variable (with a different type) when we add the initializer. 33 union U { 34 int a; 35 float f; 36 constexpr U() : f(0.0) {} 37 }; 38 static thread_local U u; 39 void *p = &u; 40 } 41 42 template<typename T> struct V { static thread_local int m; }; 43 template<typename T> thread_local int V<T>::m = g(); 44 45 template<typename T> struct W { static thread_local int m; }; 46 template<typename T> thread_local int W<T>::m = 123; 47 48 struct Dtor { ~Dtor(); }; 49 template<typename T> struct X { static thread_local Dtor m; }; 50 template<typename T> thread_local Dtor X<T>::m; 51 52 // CHECK-DAG: @e = global 53 void *e = V<int>::m + W<int>::m + &X<int>::m; 54 55 template thread_local int V<float>::m; 56 template thread_local int W<float>::m; 57 template thread_local Dtor X<float>::m; 58 59 extern template thread_local int V<char>::m; 60 extern template thread_local int W<char>::m; 61 extern template thread_local Dtor X<char>::m; 62 63 void *e2 = V<char>::m + W<char>::m + &X<char>::m; 64 65 // CHECK-DAG: @_ZN1VIiE1mE = linkonce_odr thread_local global i32 0 66 // CHECK-DAG: @_ZN1WIiE1mE = linkonce_odr thread_local global i32 123 67 // CHECK-DAG: @_ZN1XIiE1mE = linkonce_odr thread_local global {{.*}} 68 // CHECK-DAG: @_ZN1VIfE1mE = weak_odr thread_local global i32 0 69 // CHECK-DAG: @_ZN1WIfE1mE = weak_odr thread_local global i32 123 70 // CHECK-DAG: @_ZN1XIfE1mE = weak_odr thread_local global {{.*}} 71 72 // CHECK-DAG: @_ZZ1fvE1n = internal thread_local global i32 0 73 74 // CHECK-DAG: @_ZGVZ1fvE1n = internal thread_local global i8 0 75 76 // CHECK-DAG: @_ZZ8tls_dtorvE1s = internal thread_local global 77 // CHECK-DAG: @_ZGVZ8tls_dtorvE1s = internal thread_local global i8 0 78 79 // CHECK-DAG: @_ZZ8tls_dtorvE1t = internal thread_local global 80 // CHECK-DAG: @_ZGVZ8tls_dtorvE1t = internal thread_local global i8 0 81 82 // CHECK-DAG: @_ZZ8tls_dtorvE1u = internal thread_local global 83 // CHECK-DAG: @_ZGVZ8tls_dtorvE1u = internal thread_local global i8 0 84 // CHECK-DAG: @_ZGRZ8tls_dtorvE1u_ = internal thread_local global 85 86 // CHECK-DAG: @_ZGVN1VIiE1mE = linkonce_odr thread_local global i64 0 87 88 // CHECK-DAG: @__tls_guard = internal thread_local global i8 0 89 90 // CHECK-DAG: @llvm.global_ctors = appending global {{.*}} @[[GLOBAL_INIT:[^ ]*]] 91 92 // LINUX-DAG: @_ZTH1a = alias void (), void ()* @__tls_init 93 // DARWIN-DAG: @_ZTH1a = internal alias void (), void ()* @__tls_init 94 // CHECK-DAG: @_ZTHL1d = internal alias void (), void ()* @__tls_init 95 // LINUX-DAG: @_ZTHN1U1mE = alias void (), void ()* @__tls_init 96 // DARWIN-DAG: @_ZTHN1U1mE = internal alias void (), void ()* @__tls_init 97 // CHECK-DAG: @_ZTHN1VIiE1mE = linkonce_odr alias void (), void ()* @[[V_M_INIT:[^, ]*]] 98 // CHECK-NOT: @_ZTHN1WIiE1mE = 99 // CHECK-DAG: @_ZTHN1XIiE1mE = linkonce_odr alias void (), void ()* @[[X_M_INIT:[^, ]*]] 100 // CHECK-DAG: @_ZTHN1VIfE1mE = weak_odr alias void (), void ()* @[[VF_M_INIT:[^, ]*]] 101 // CHECK-NOT: @_ZTHN1WIfE1mE = 102 // CHECK-DAG: @_ZTHN1XIfE1mE = weak_odr alias void (), void ()* @[[XF_M_INIT:[^, ]*]] 103 104 105 // Individual variable initialization functions: 106 107 // CHECK: define {{.*}} @[[A_INIT:.*]]() 108 // CHECK: call i32 @_Z1fv() 109 // CHECK-NEXT: store i32 {{.*}}, i32* @a, align 4 110 111 // CHECK-LABEL: define i32 @_Z1fv() 112 int f() { 113 // CHECK: %[[GUARD:.*]] = load i8, i8* @_ZGVZ1fvE1n, align 1 114 // CHECK: %[[NEED_INIT:.*]] = icmp eq i8 %[[GUARD]], 0 115 // CHECK: br i1 %[[NEED_INIT]] 116 117 // CHECK: %[[CALL:.*]] = call i32 @_Z1gv() 118 // CHECK: store i32 %[[CALL]], i32* @_ZZ1fvE1n, align 4 119 // CHECK: store i8 1, i8* @_ZGVZ1fvE1n 120 // CHECK: br label 121 static thread_local int n = g(); 122 123 // CHECK: load i32, i32* @_ZZ1fvE1n, align 4 124 return n; 125 } 126 127 // CHECK: define {{.*}} @[[C_INIT:.*]]() 128 // LINUX: call i32* @_ZTW1b() 129 // DARWIN: call cxx_fast_tlscc i32* @_ZTW1b() 130 // CHECK-NEXT: load i32, i32* %{{.*}}, align 4 131 // CHECK-NEXT: store i32 %{{.*}}, i32* @c, align 4 132 133 // LINUX-LABEL: define weak_odr hidden i32* @_ZTW1b() 134 // LINUX: br i1 icmp ne (void ()* @_ZTH1b, void ()* null), 135 // not null: 136 // LINUX: call void @_ZTH1b() 137 // LINUX: br label 138 // finally: 139 // LINUX: ret i32* @b 140 // DARWIN-LABEL: declare cxx_fast_tlscc i32* @_ZTW1b() 141 // There is no definition of the thread wrapper on Darwin for external TLV. 142 143 // CHECK: define {{.*}} @[[D_INIT:.*]]() 144 // CHECK: call i32 @_Z1gv() 145 // CHECK-NEXT: store i32 %{{.*}}, i32* @_ZL1d, align 4 146 147 // CHECK: define {{.*}} @[[U_M_INIT:.*]]() 148 // CHECK: call i32 @_Z1fv() 149 // CHECK-NEXT: store i32 %{{.*}}, i32* @_ZN1U1mE, align 4 150 151 // CHECK: define {{.*}} @[[E_INIT:.*]]() 152 // LINUX: call i32* @_ZTWN1VIiE1mE() 153 // DARWIN: call cxx_fast_tlscc i32* @_ZTWN1VIiE1mE() 154 // CHECK-NEXT: load i32, i32* %{{.*}}, align 4 155 // LINUX: call {{.*}}* @_ZTWN1XIiE1mE() 156 // DARWIN: call cxx_fast_tlscc {{.*}}* @_ZTWN1XIiE1mE() 157 // CHECK: store {{.*}} @e 158 159 // LINUX-LABEL: define weak_odr hidden i32* @_ZTWN1VIiE1mE() 160 // DARWIN-LABEL: define weak_odr hidden cxx_fast_tlscc i32* @_ZTWN1VIiE1mE() 161 // LINUX: call void @_ZTHN1VIiE1mE() 162 // DARWIN: call cxx_fast_tlscc void @_ZTHN1VIiE1mE() 163 // CHECK: ret i32* @_ZN1VIiE1mE 164 165 // LINUX-LABEL: define weak_odr hidden i32* @_ZTWN1WIiE1mE() 166 // DARWIN-LABEL: define weak_odr hidden cxx_fast_tlscc i32* @_ZTWN1WIiE1mE() 167 // CHECK-NOT: call 168 // CHECK: ret i32* @_ZN1WIiE1mE 169 170 // LINUX-LABEL: define weak_odr hidden {{.*}}* @_ZTWN1XIiE1mE() 171 // DARWIN-LABEL: define weak_odr hidden cxx_fast_tlscc {{.*}}* @_ZTWN1XIiE1mE() 172 // LINUX: call void @_ZTHN1XIiE1mE() 173 // DARWIN: call cxx_fast_tlscc void @_ZTHN1XIiE1mE() 174 // CHECK: ret {{.*}}* @_ZN1XIiE1mE 175 176 // LINUX: define internal void @[[VF_M_INIT]]() 177 // DARWIN: define internal cxx_fast_tlscc void @[[VF_M_INIT]]() 178 // LINUX-SAME: comdat($_ZN1VIfE1mE) 179 // DARWIN-NOT: comdat 180 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1VIfE1mE to i8*) 181 // CHECK: %[[VF_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 182 // CHECK: br i1 %[[VF_M_INITIALIZED]], 183 // need init: 184 // CHECK: call i32 @_Z1gv() 185 // CHECK: store i32 %{{.*}}, i32* @_ZN1VIfE1mE, align 4 186 // CHECK: store i64 1, i64* @_ZGVN1VIfE1mE 187 // CHECK: br label 188 189 // LINUX: define internal void @[[XF_M_INIT]]() 190 // DARWIN: define internal cxx_fast_tlscc void @[[XF_M_INIT]]() 191 // LINUX-SAME: comdat($_ZN1XIfE1mE) 192 // DARWIN-NOT: comdat 193 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1XIfE1mE to i8*) 194 // CHECK: %[[XF_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 195 // CHECK: br i1 %[[XF_M_INITIALIZED]], 196 // need init: 197 // LINUX: call {{.*}}__cxa_thread_atexit 198 // DARWIN: call {{.*}}_tlv_atexit 199 // CHECK: store i64 1, i64* @_ZGVN1XIfE1mE 200 // CHECK: br label 201 202 // LINUX: declare i32 @__cxa_thread_atexit(void (i8*)*, i8*, i8*) 203 // DARWIN: declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*) 204 205 // DARWIN: declare cxx_fast_tlscc i32* @_ZTWN1VIcE1mE() 206 // LINUX: define weak_odr hidden i32* @_ZTWN1VIcE1mE() 207 // LINUX-NOT: comdat 208 // LINUX: br i1 icmp ne (void ()* @_ZTHN1VIcE1mE, 209 // LINUX: call void @_ZTHN1VIcE1mE() 210 // LINUX: ret i32* @_ZN1VIcE1mE 211 212 // DARWIN: declare cxx_fast_tlscc i32* @_ZTWN1WIcE1mE() 213 // LINUX: define weak_odr hidden i32* @_ZTWN1WIcE1mE() 214 // LINUX-NOT: comdat 215 // LINUX: br i1 icmp ne (void ()* @_ZTHN1WIcE1mE, 216 // LINUX: call void @_ZTHN1WIcE1mE() 217 // LINUX: ret i32* @_ZN1WIcE1mE 218 219 // DARWIN: declare cxx_fast_tlscc {{.*}}* @_ZTWN1XIcE1mE() 220 // LINUX: define weak_odr hidden {{.*}}* @_ZTWN1XIcE1mE() 221 // LINUX-NOT: comdat 222 // LINUX: br i1 icmp ne (void ()* @_ZTHN1XIcE1mE, 223 // LINUX: call void @_ZTHN1XIcE1mE() 224 // LINUX: ret {{.*}}* @_ZN1XIcE1mE 225 226 struct S { S(); ~S(); }; 227 struct T { ~T(); }; 228 229 // CHECK-LABEL: define void @_Z8tls_dtorv() 230 void tls_dtor() { 231 // CHECK: load i8, i8* @_ZGVZ8tls_dtorvE1s 232 // CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZZ8tls_dtorvE1s) 233 // LINUX: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZZ8tls_dtorvE1s{{.*}} @__dso_handle 234 // DARWIN: call i32 @_tlv_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZZ8tls_dtorvE1s{{.*}} @__dso_handle 235 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1s 236 static thread_local S s; 237 238 // CHECK: load i8, i8* @_ZGVZ8tls_dtorvE1t 239 // CHECK-NOT: _ZN1T 240 // LINUX: call i32 @__cxa_thread_atexit({{.*}}@_ZN1TD1Ev {{.*}}@_ZZ8tls_dtorvE1t{{.*}} @__dso_handle 241 // DARWIN: call i32 @_tlv_atexit({{.*}}@_ZN1TD1Ev {{.*}}@_ZZ8tls_dtorvE1t{{.*}} @__dso_handle 242 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1t 243 static thread_local T t; 244 245 // CHECK: load i8, i8* @_ZGVZ8tls_dtorvE1u 246 // CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZGRZ8tls_dtorvE1u_) 247 // LINUX: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZGRZ8tls_dtorvE1u_{{.*}} @__dso_handle 248 // DARWIN: call i32 @_tlv_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZGRZ8tls_dtorvE1u_{{.*}} @__dso_handle 249 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1u 250 static thread_local const S &u = S(); 251 } 252 253 // CHECK: define {{.*}} @_Z7PR15991v( 254 int PR15991() { 255 thread_local int n; 256 auto l = [] { return n; }; 257 return l(); 258 } 259 260 struct PR19254 { 261 static thread_local int n; 262 int f(); 263 }; 264 // CHECK: define {{.*}} @_ZN7PR192541fEv( 265 int PR19254::f() { 266 // LINUX: call void @_ZTHN7PR192541nE( 267 // DARWIN: call cxx_fast_tlscc i32* @_ZTWN7PR192541nE( 268 return this->n; 269 } 270 271 namespace { 272 thread_local int anon_i{1}; 273 } 274 void set_anon_i() { 275 anon_i = 2; 276 } 277 // LINUX-LABEL: define internal i32* @_ZTWN12_GLOBAL__N_16anon_iE() 278 // DARWIN-LABEL: define internal cxx_fast_tlscc i32* @_ZTWN12_GLOBAL__N_16anon_iE() 279 280 // LINUX: define internal void @[[V_M_INIT]]() 281 // DARWIN: define internal cxx_fast_tlscc void @[[V_M_INIT]]() 282 // LINUX-SAME: comdat($_ZN1VIiE1mE) 283 // DARWIN-NOT: comdat 284 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1VIiE1mE to i8*) 285 // CHECK: %[[V_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 286 // CHECK: br i1 %[[V_M_INITIALIZED]], 287 // need init: 288 // CHECK: call i32 @_Z1gv() 289 // CHECK: store i32 %{{.*}}, i32* @_ZN1VIiE1mE, align 4 290 // CHECK: store i64 1, i64* @_ZGVN1VIiE1mE 291 // CHECK: br label 292 293 // LINUX: define internal void @[[X_M_INIT]]() 294 // DARWIN: define internal cxx_fast_tlscc void @[[X_M_INIT]]() 295 // LINUX-SAME: comdat($_ZN1XIiE1mE) 296 // DARWIN-NOT: comdat 297 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1XIiE1mE to i8*) 298 // CHECK: %[[X_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 299 // CHECK: br i1 %[[X_M_INITIALIZED]], 300 // need init: 301 // LINUX: call {{.*}}__cxa_thread_atexit 302 // DARWIN: call {{.*}}_tlv_atexit 303 // CHECK: store i64 1, i64* @_ZGVN1XIiE1mE 304 // CHECK: br label 305 306 // CHECK: define {{.*}}@[[GLOBAL_INIT:.*]]() 307 // CHECK: call void @[[C_INIT]]() 308 // CHECK: call void @[[E_INIT]]() 309 310 311 // CHECK: define {{.*}}@__tls_init() 312 // CHECK: load i8, i8* @__tls_guard 313 // CHECK: %[[NEED_TLS_INIT:.*]] = icmp eq i8 %{{.*}}, 0 314 // CHECK: br i1 %[[NEED_TLS_INIT]], 315 // init: 316 // CHECK: store i8 1, i8* @__tls_guard 317 // CHECK-OPT: call {}* @llvm.invariant.start.p0i8(i64 1, i8* @__tls_guard) 318 // CHECK-NOT: call void @[[V_M_INIT]]() 319 // CHECK: call void @[[A_INIT]]() 320 // CHECK-NOT: call void @[[V_M_INIT]]() 321 // CHECK: call void @[[D_INIT]]() 322 // CHECK-NOT: call void @[[V_M_INIT]]() 323 // CHECK: call void @[[U_M_INIT]]() 324 // CHECK-NOT: call void @[[V_M_INIT]]() 325 326 327 // LINUX: define weak_odr hidden i32* @_ZTW1a() 328 // DARWIN: define cxx_fast_tlscc i32* @_ZTW1a() 329 // LINUX: call void @_ZTH1a() 330 // DARWIN: call cxx_fast_tlscc void @_ZTH1a() 331 // CHECK: ret i32* @a 332 // CHECK: } 333 334 335 // LINUX: declare extern_weak void @_ZTH1b() [[ATTR:#[0-9]+]] 336 337 338 // LINUX-LABEL: define internal i32* @_ZTWL1d() 339 // DARWIN-LABEL: define internal cxx_fast_tlscc i32* @_ZTWL1d() 340 // LINUX: call void @_ZTHL1d() 341 // DARWIN: call cxx_fast_tlscc void @_ZTHL1d() 342 // CHECK: ret i32* @_ZL1d 343 344 // LINUX-LABEL: define weak_odr hidden i32* @_ZTWN1U1mE() 345 // DARWIN-LABEL: define cxx_fast_tlscc i32* @_ZTWN1U1mE() 346 // LINUX: call void @_ZTHN1U1mE() 347 // DARWIN: call cxx_fast_tlscc void @_ZTHN1U1mE() 348 // CHECK: ret i32* @_ZN1U1mE 349 350 // LINUX: attributes [[ATTR]] = { {{.+}} } 351