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 // LINUX-DAG: @_ZTHN1U1mE = alias void (), void ()* @__tls_init 95 // DARWIN-DAG: @_ZTHN1U1mE = internal alias void (), void ()* @__tls_init 96 // CHECK-DAG: @_ZTHN1VIiE1mE = linkonce_odr alias void (), void ()* @[[V_M_INIT:[^, ]*]] 97 // CHECK-DAG: @_ZTHN1XIiE1mE = linkonce_odr alias void (), void ()* @[[X_M_INIT:[^, ]*]] 98 // CHECK-DAG: @_ZTHN1VIfE1mE = weak_odr alias void (), void ()* @[[VF_M_INIT:[^, ]*]] 99 // CHECK-DAG: @_ZTHN1XIfE1mE = weak_odr alias void (), void ()* @[[XF_M_INIT:[^, ]*]] 100 // FIXME: We really want a CHECK-DAG-NOT for these. 101 // CHECK-NOT: @_ZTHN1WIiE1mE = 102 // CHECK-NOT: @_ZTHN1WIfE1mE = 103 // CHECK-NOT: @_ZTHL1d = 104 105 106 // Individual variable initialization functions: 107 108 // CHECK: define {{.*}} @[[A_INIT:.*]]() 109 // CHECK: call i32 @_Z1fv() 110 // CHECK-NEXT: store i32 {{.*}}, i32* @a, align 4 111 112 // CHECK-LABEL: define i32 @_Z1fv() 113 int f() { 114 // CHECK: %[[GUARD:.*]] = load i8, i8* @_ZGVZ1fvE1n, align 1 115 // CHECK: %[[NEED_INIT:.*]] = icmp eq i8 %[[GUARD]], 0 116 // CHECK: br i1 %[[NEED_INIT]] 117 118 // CHECK: %[[CALL:.*]] = call i32 @_Z1gv() 119 // CHECK: store i32 %[[CALL]], i32* @_ZZ1fvE1n, align 4 120 // CHECK: store i8 1, i8* @_ZGVZ1fvE1n 121 // CHECK: br label 122 static thread_local int n = g(); 123 124 // CHECK: load i32, i32* @_ZZ1fvE1n, align 4 125 return n; 126 } 127 128 // CHECK: define {{.*}} @[[C_INIT:.*]]() 129 // LINUX: call i32* @_ZTW1b() 130 // DARWIN: call cxx_fast_tlscc i32* @_ZTW1b() 131 // CHECK-NEXT: load i32, i32* %{{.*}}, align 4 132 // CHECK-NEXT: store i32 %{{.*}}, i32* @c, align 4 133 134 // LINUX-LABEL: define linkonce_odr hidden i32* @_ZTW1b() 135 // LINUX: br i1 icmp ne (void ()* @_ZTH1b, void ()* null), 136 // not null: 137 // LINUX: call void @_ZTH1b() 138 // LINUX: br label 139 // finally: 140 // LINUX: ret i32* @b 141 // DARWIN-LABEL: declare cxx_fast_tlscc i32* @_ZTW1b() 142 // There is no definition of the thread wrapper on Darwin for external TLV. 143 144 // CHECK: define {{.*}} @[[D_INIT:.*]]() 145 // CHECK: call i32 @_Z1gv() 146 // CHECK-NEXT: store i32 %{{.*}}, i32* @_ZL1d, align 4 147 148 // CHECK: define {{.*}} @[[U_M_INIT:.*]]() 149 // CHECK: call i32 @_Z1fv() 150 // CHECK-NEXT: store i32 %{{.*}}, i32* @_ZN1U1mE, align 4 151 152 // CHECK: define {{.*}} @[[E_INIT:.*]]() 153 // LINUX: call i32* @_ZTWN1VIiE1mE() 154 // DARWIN: call cxx_fast_tlscc i32* @_ZTWN1VIiE1mE() 155 // CHECK-NEXT: load i32, i32* %{{.*}}, align 4 156 // LINUX: call {{.*}}* @_ZTWN1XIiE1mE() 157 // DARWIN: call cxx_fast_tlscc {{.*}}* @_ZTWN1XIiE1mE() 158 // CHECK: store {{.*}} @e 159 160 // LINUX-LABEL: define weak_odr hidden i32* @_ZTWN1VIiE1mE() 161 // DARWIN-LABEL: define weak_odr hidden cxx_fast_tlscc i32* @_ZTWN1VIiE1mE() 162 // LINUX: call void @_ZTHN1VIiE1mE() 163 // DARWIN: call cxx_fast_tlscc void @_ZTHN1VIiE1mE() 164 // CHECK: ret i32* @_ZN1VIiE1mE 165 166 // LINUX-LABEL: define weak_odr hidden i32* @_ZTWN1WIiE1mE() 167 // DARWIN-LABEL: define weak_odr hidden cxx_fast_tlscc i32* @_ZTWN1WIiE1mE() 168 // CHECK-NOT: call 169 // CHECK: ret i32* @_ZN1WIiE1mE 170 171 // LINUX-LABEL: define weak_odr hidden {{.*}}* @_ZTWN1XIiE1mE() 172 // DARWIN-LABEL: define weak_odr hidden cxx_fast_tlscc {{.*}}* @_ZTWN1XIiE1mE() 173 // LINUX: call void @_ZTHN1XIiE1mE() 174 // DARWIN: call cxx_fast_tlscc void @_ZTHN1XIiE1mE() 175 // CHECK: ret {{.*}}* @_ZN1XIiE1mE 176 177 // LINUX: define internal void @[[VF_M_INIT]]() 178 // DARWIN: define internal cxx_fast_tlscc void @[[VF_M_INIT]]() 179 // LINUX-SAME: comdat($_ZN1VIfE1mE) 180 // DARWIN-NOT: comdat 181 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1VIfE1mE to i8*) 182 // CHECK: %[[VF_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 183 // CHECK: br i1 %[[VF_M_INITIALIZED]], 184 // need init: 185 // CHECK: call i32 @_Z1gv() 186 // CHECK: store i32 %{{.*}}, i32* @_ZN1VIfE1mE, align 4 187 // CHECK: store i64 1, i64* @_ZGVN1VIfE1mE 188 // CHECK: br label 189 190 // LINUX: define internal void @[[XF_M_INIT]]() 191 // DARWIN: define internal cxx_fast_tlscc void @[[XF_M_INIT]]() 192 // LINUX-SAME: comdat($_ZN1XIfE1mE) 193 // DARWIN-NOT: comdat 194 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1XIfE1mE to i8*) 195 // CHECK: %[[XF_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 196 // CHECK: br i1 %[[XF_M_INITIALIZED]], 197 // need init: 198 // LINUX: call {{.*}}__cxa_thread_atexit 199 // DARWIN: call {{.*}}_tlv_atexit 200 // CHECK: store i64 1, i64* @_ZGVN1XIfE1mE 201 // CHECK: br label 202 203 // LINUX: declare i32 @__cxa_thread_atexit(void (i8*)*, i8*, i8*) 204 // DARWIN: declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*) 205 206 // DARWIN: declare cxx_fast_tlscc i32* @_ZTWN1VIcE1mE() 207 // LINUX: define linkonce_odr hidden i32* @_ZTWN1VIcE1mE() 208 // LINUX-NOT: comdat 209 // LINUX: br i1 icmp ne (void ()* @_ZTHN1VIcE1mE, 210 // LINUX: call void @_ZTHN1VIcE1mE() 211 // LINUX: ret i32* @_ZN1VIcE1mE 212 213 // DARWIN: declare cxx_fast_tlscc i32* @_ZTWN1WIcE1mE() 214 // LINUX: define linkonce_odr hidden i32* @_ZTWN1WIcE1mE() 215 // LINUX-NOT: comdat 216 // LINUX: br i1 icmp ne (void ()* @_ZTHN1WIcE1mE, 217 // LINUX: call void @_ZTHN1WIcE1mE() 218 // LINUX: ret i32* @_ZN1WIcE1mE 219 220 // DARWIN: declare cxx_fast_tlscc {{.*}}* @_ZTWN1XIcE1mE() 221 // LINUX: define linkonce_odr hidden {{.*}}* @_ZTWN1XIcE1mE() 222 // LINUX-NOT: comdat 223 // LINUX: br i1 icmp ne (void ()* @_ZTHN1XIcE1mE, 224 // LINUX: call void @_ZTHN1XIcE1mE() 225 // LINUX: ret {{.*}}* @_ZN1XIcE1mE 226 227 struct S { S(); ~S(); }; 228 struct T { ~T(); }; 229 230 // CHECK-LABEL: define void @_Z8tls_dtorv() 231 void tls_dtor() { 232 // CHECK: load i8, i8* @_ZGVZ8tls_dtorvE1s 233 // CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZZ8tls_dtorvE1s) 234 // LINUX: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZZ8tls_dtorvE1s{{.*}} @__dso_handle 235 // DARWIN: call i32 @_tlv_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZZ8tls_dtorvE1s{{.*}} @__dso_handle 236 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1s 237 static thread_local S s; 238 239 // CHECK: load i8, i8* @_ZGVZ8tls_dtorvE1t 240 // CHECK-NOT: _ZN1T 241 // LINUX: call i32 @__cxa_thread_atexit({{.*}}@_ZN1TD1Ev {{.*}}@_ZZ8tls_dtorvE1t{{.*}} @__dso_handle 242 // DARWIN: call i32 @_tlv_atexit({{.*}}@_ZN1TD1Ev {{.*}}@_ZZ8tls_dtorvE1t{{.*}} @__dso_handle 243 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1t 244 static thread_local T t; 245 246 // CHECK: load i8, i8* @_ZGVZ8tls_dtorvE1u 247 // CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZGRZ8tls_dtorvE1u_) 248 // LINUX: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZGRZ8tls_dtorvE1u_{{.*}} @__dso_handle 249 // DARWIN: call i32 @_tlv_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZGRZ8tls_dtorvE1u_{{.*}} @__dso_handle 250 // CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1u 251 static thread_local const S &u = S(); 252 } 253 254 // CHECK: define {{.*}} @_Z7PR15991v( 255 int PR15991() { 256 thread_local int n; 257 auto l = [] { return n; }; 258 return l(); 259 } 260 261 struct PR19254 { 262 static thread_local int n; 263 int f(); 264 }; 265 // CHECK: define {{.*}} @_ZN7PR192541fEv( 266 int PR19254::f() { 267 // LINUX: call void @_ZTHN7PR192541nE( 268 // DARWIN: call cxx_fast_tlscc i32* @_ZTWN7PR192541nE( 269 return this->n; 270 } 271 272 namespace { 273 thread_local int anon_i{f()}; 274 } 275 void set_anon_i() { 276 anon_i = 2; 277 } 278 // LINUX-LABEL: define internal i32* @_ZTWN12_GLOBAL__N_16anon_iE() 279 // DARWIN-LABEL: define internal cxx_fast_tlscc i32* @_ZTWN12_GLOBAL__N_16anon_iE() 280 281 // LINUX: define internal void @[[V_M_INIT]]() 282 // DARWIN: define internal cxx_fast_tlscc void @[[V_M_INIT]]() 283 // LINUX-SAME: comdat($_ZN1VIiE1mE) 284 // DARWIN-NOT: comdat 285 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1VIiE1mE to i8*) 286 // CHECK: %[[V_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 287 // CHECK: br i1 %[[V_M_INITIALIZED]], 288 // need init: 289 // CHECK: call i32 @_Z1gv() 290 // CHECK: store i32 %{{.*}}, i32* @_ZN1VIiE1mE, align 4 291 // CHECK: store i64 1, i64* @_ZGVN1VIiE1mE 292 // CHECK: br label 293 294 // LINUX: define internal void @[[X_M_INIT]]() 295 // DARWIN: define internal cxx_fast_tlscc void @[[X_M_INIT]]() 296 // LINUX-SAME: comdat($_ZN1XIiE1mE) 297 // DARWIN-NOT: comdat 298 // CHECK: load i8, i8* bitcast (i64* @_ZGVN1XIiE1mE to i8*) 299 // CHECK: %[[X_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0 300 // CHECK: br i1 %[[X_M_INITIALIZED]], 301 // need init: 302 // LINUX: call {{.*}}__cxa_thread_atexit 303 // DARWIN: call {{.*}}_tlv_atexit 304 // CHECK: store i64 1, i64* @_ZGVN1XIiE1mE 305 // CHECK: br label 306 307 // CHECK: define {{.*}}@[[GLOBAL_INIT:.*]]() 308 // CHECK: call void @[[C_INIT]]() 309 // CHECK: call void @[[E_INIT]]() 310 311 312 // CHECK: define {{.*}}@__tls_init() 313 // CHECK: load i8, i8* @__tls_guard 314 // CHECK: %[[NEED_TLS_INIT:.*]] = icmp eq i8 %{{.*}}, 0 315 // CHECK: br i1 %[[NEED_TLS_INIT]], 316 // init: 317 // CHECK: store i8 1, i8* @__tls_guard 318 // CHECK-OPT: call {}* @llvm.invariant.start.p0i8(i64 1, i8* @__tls_guard) 319 // CHECK-NOT: call void @[[V_M_INIT]]() 320 // CHECK: call void @[[A_INIT]]() 321 // CHECK-NOT: call void @[[V_M_INIT]]() 322 // CHECK: call void @[[D_INIT]]() 323 // CHECK-NOT: call void @[[V_M_INIT]]() 324 // CHECK: call void @[[U_M_INIT]]() 325 // CHECK-NOT: call void @[[V_M_INIT]]() 326 327 328 // LINUX: define weak_odr hidden i32* @_ZTW1a() 329 // DARWIN: define cxx_fast_tlscc i32* @_ZTW1a() 330 // LINUX: call void @_ZTH1a() 331 // DARWIN: call cxx_fast_tlscc void @_ZTH1a() 332 // CHECK: ret i32* @a 333 // CHECK: } 334 335 336 // Should not emit a thread wrapper for internal-linkage unused variable 'd'. 337 // We separately check that 'd' does in fact get initialized with the other 338 // thread-local variables in this TU. 339 // CHECK-NOT: define {{.*}} @_ZTWL1d() 340 341 // LINUX-LABEL: define weak_odr hidden i32* @_ZTWN1U1mE() 342 // DARWIN-LABEL: define cxx_fast_tlscc i32* @_ZTWN1U1mE() 343 // LINUX: call void @_ZTHN1U1mE() 344 // DARWIN: call cxx_fast_tlscc void @_ZTHN1U1mE() 345 // CHECK: ret i32* @_ZN1U1mE 346 347 // LINUX: declare extern_weak void @_ZTH1b() [[ATTR:#[0-9]+]] 348 349 // LINUX: attributes [[ATTR]] = { {{.+}} } 350