1// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
2// rdar://9894548
3
4typedef unsigned long word_t;
5typedef unsigned long u64_t;
6typedef unsigned int u32_t;
7
8class ioapic_redir_t {
9public:
10 union {
11  struct {
12   word_t vector : 8;
13
14   word_t delivery_mode : 3;
15   word_t dest_mode : 1;
16
17   word_t delivery_status : 1;
18   word_t polarity : 1;
19   word_t irr : 1;
20   word_t trigger_mode : 1;
21
22   word_t mask : 1;
23   word_t _pad0 : 15;
24
25   word_t dest : 8;
26  };
27  volatile u32_t raw[2];
28  volatile u64_t raw64;
29 };
30};
31
32struct ioapic_shadow_struct
33{
34 ioapic_redir_t redirs[24];
35} ioapic_shadow[16];
36
37void init_ioapic(unsigned long ioapic_id)
38{
39     ioapic_redir_t entry;
40     ioapic_shadow[ioapic_id].redirs[3] = entry;
41}
42
43// CHECK: call void @llvm.memcpy
44