clang/test/CodeGenCXX/copy-assign-volatile-synthesis.cpp

   1 // RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
   2 // rdar://9894548
   3
   4 typedef unsigned long word_t;
   5 typedef unsigned long u64_t;
   6 typedef unsigned int u32_t;
   7
   8 class ioapic_redir_t {
   9 public:
  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
  32 struct ioapic_shadow_struct
  33 {
  34  ioapic_redir_t redirs[24];
  35 } ioapic_shadow[16];
  36
  37 void 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