1 // RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++2a %s -emit-llvm -o - | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s
2 // RUN: %clang_cc1 -triple x86_64-apple-darwin12 -std=c++2a %s -emit-llvm -o - | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s
3
4 // Check variable definitions/declarations. Note that on Darwin, typically the
5 // variable's symbol is marked internal, and only the _ZTW function is
6 // exported. Except: constinit variables do get exported, even on darwin.
7
8 // CHECK-DAG: @a = external thread_local global i32
9 // CHECK-DAG: @b = external thread_local global i32
10 // LINUX-DAG: @c ={{.*}} thread_local global i32 0, align 4
11 // DARWIN-DAG: @c = internal thread_local global i32 0, align 4
12 // LINUX-DAG: @d ={{.*}} thread_local global i32 0, align 4
13 // DARWIN-DAG: @d = internal thread_local global i32 0, align 4
14 // CHECK-DAG: @e = external thread_local global %struct.Destructed, align 4
15 // CHECK-DAG: @e2 ={{.*}} thread_local global %struct.Destructed zeroinitializer, align 4
16 // CHECK-DAG: @f ={{.*}} thread_local global i32 4, align 4
17
18 extern thread_local int a;
19 extern thread_local constinit int b;
20
21 // CHECK-LABEL: define{{.*}} i32 @_Z5get_av()
22 // CHECK: call {{(cxx_fast_tlscc )?}}i32* @_ZTW1a()
23 // CHECK: }
get_a()24 int get_a() { return a; }
25
26 // LINUX-LABEL: define linkonce_odr {{.*}} @_ZTW1a()
27 // LINUX: br i1
28 // LINUX: call void @_ZTH1a()
29 // LINUX: }
30 // DARWIN-NOT: define {{.*}}@_ZTW1a()
31
32 // CHECK-LABEL: define{{.*}} i32 @_Z5get_bv()
33 // CHECK-NOT: call
34 // CHECK: load i32, i32* @b
35 // CHECK-NOT: call
36 // CHECK: }
get_b()37 int get_b() { return b; }
38
39 // CHECK-NOT: define {{.*}} @_ZTW1b()
40
41 extern thread_local int c;
42
43 // CHECK-LABEL: define{{.*}} i32 @_Z5get_cv()
44 // LINUX: call {{(cxx_fast_tlscc )?}}i32* @_ZTW1c()
45 // CHECK: load i32, i32* %
46 // CHECK: }
get_c()47 int get_c() { return c; }
48
49 // Note: use of 'c' does not trigger initialization of 'd', because 'c' has a
50 // constant initializer.
51 // DARWIN-LABEL: define cxx_fast_tlscc {{.*}} @_ZTW1c()
52 // LINUX-LABEL: define weak_odr {{.*}} @_ZTW1c()
53 // CHECK-NOT: br i1
54 // CHECK-NOT: call
55 // CHECK: ret i32* @c
56 // CHECK: }
57
58 thread_local int c = 0;
59
60 int d_init();
61
62 // CHECK: define {{.*}}[[D_INIT:@__cxx_global_var_init[^(]*]](
63 // CHECK: call {{.*}} @_Z6d_initv()
64 thread_local int d = d_init();
65
66 struct Destructed {
67 int n = 0;
68 ~Destructed();
69 };
70
71 extern thread_local constinit Destructed e;
72 // CHECK-LABEL: define{{.*}} i32 @_Z5get_ev()
73 // CHECK: call {{.*}}* @_ZTW1e()
74 // CHECK: }
get_e()75 int get_e() { return e.n; }
76
77 // CHECK: define {{.*}}[[E2_INIT:@__cxx_global_var_init[^(]*]](
78 // LINUX: call {{.*}} @__cxa_thread_atexit({{.*}} @_ZN10DestructedD1Ev {{.*}} @e2
79 // DARWIN: call {{.*}} @_tlv_atexit({{.*}} @_ZN10DestructedD1Ev {{.*}} @e2
80 thread_local constinit Destructed e2;
81
82 thread_local constinit int f = 4;
83
84 // CHECK-LABEL: define {{.*}}__tls_init
85 // CHECK: call {{.*}} [[D_INIT]]
86 // CHECK: call {{.*}} [[E2_INIT]]
87