1 // RUN: %clang_cc1 %s -std=c++14 -emit-llvm -o - -triple=x86_64-linux-gnu | FileCheck %s
2 
3 struct AM {
4   int f1, f2;
5 };
6 alignas(8) AM m;
7 AM load1() {
8   AM am;
9   // m is declared to align to 8bytes, so generate load atomic instead
10   // of libcall.
11   // CHECK-LABEL: @_Z5load1v
12   // CHECK: load atomic {{.*}} monotonic, align 8
13   __atomic_load(&m, &am, 0);
14   return am;
15 }
16 
17 struct BM {
18   int f1;
19   alignas(8) AM f2;
20 };
21 BM bm;
22 AM load2() {
23   AM am;
24   // BM::f2 is declared to align to 8bytes, so generate load atomic instead
25   // of libcall.
26   // CHECK-LABEL: @_Z5load2v
27   // CHECK: load atomic {{.*}} monotonic, align 8
28   __atomic_load(&bm.f2, &am, 0);
29   return am;
30 }
31 
32 namespace std {
33   template <class _Tp>
34   inline constexpr
35   __attribute__ ((__visibility__("hidden"), __internal_linkage__))
36   _Tp* __addressof(_Tp& __x) noexcept
37   {
38       return __builtin_addressof(__x);
39   }
40 }
41 
42 AM load3() {
43   AM am;
44   // m is declared to align to 8bytes, so generate load atomic instead
45   // of libcall.
46   // CHECK-LABEL: @_Z5load3v
47   // CHECK: load atomic {{.*}} monotonic, align 8
48   __atomic_load(std::__addressof(m), &am, 0);
49   return am;
50 }
51