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 -o - -triple x86_64-apple-darwin12 | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s
3 
4 int &f();
5 
6 // LINUX: @r = thread_local global i32* null
7 // DARWIN: @r = internal thread_local global i32* null
8 thread_local int &r = f();
9 
10 // LINUX: @_ZTH1r = alias void (), void ()* @__tls_init
11 // DARWIN: @_ZTH1r = internal alias void (), void ()* @__tls_init
12 
13 int &g() { return r; }
14 
15 // CHECK: define {{.*}} @[[R_INIT:.*]]()
16 // CHECK: call dereferenceable({{[0-9]+}}) i32* @_Z1fv()
17 // CHECK: store i32* %{{.*}}, i32** @r, align 8
18 
19 // CHECK-LABEL: define dereferenceable({{[0-9]+}}) i32* @_Z1gv()
20 // LINUX: call i32* @_ZTW1r()
21 // DARWIN: call cxx_fast_tlscc i32* @_ZTW1r()
22 // CHECK: ret i32* %{{.*}}
23 
24 // LINUX: define weak_odr hidden i32* @_ZTW1r() [[ATTR0:#[0-9]+]] {
25 // DARWIN: define cxx_fast_tlscc i32* @_ZTW1r() [[ATTR1:#[0-9]+]] {
26 // LINUX: call void @_ZTH1r()
27 // DARWIN: call cxx_fast_tlscc void @_ZTH1r()
28 // CHECK: load i32*, i32** @r, align 8
29 // CHECK: ret i32* %{{.*}}
30 
31 // LINUX-LABEL: define internal void @__tls_init()
32 // DARWIN-LABEL: define internal cxx_fast_tlscc void @__tls_init()
33 // CHECK: call void @[[R_INIT]]()
34 
35 // LINUX: attributes [[ATTR0]] = { {{.*}}"target-features"{{.*}} }
36 // DARWIN: attributes [[ATTR1]] = { {{.*}}nounwind{{.*}}"target-features"{{.*}}  }
37