text: // RUN: %clang_cc1 %s -emit-llvm -o - -triple=thumbv7m-none--eabi -target-cpu cortex-m3 | FileCheck %s
  
  int i;
  long long l;
  
  typedef enum memory_order {
    memory_order_relaxed, memory_order_consume, memory_order_acquire,
    memory_order_release, memory_order_acq_rel, memory_order_seq_cst
  } memory_order;
  
  void test_presence(void)
  {
    // CHECK-LABEL: @test_presence
    // CHECK: atomicrmw add i32* {{.*}} seq_cst
    __atomic_fetch_add(&i, 1, memory_order_seq_cst);
    // CHECK: atomicrmw sub i32* {{.*}} seq_cst
    __atomic_fetch_sub(&i, 1, memory_order_seq_cst);
    // CHECK: load atomic i32, i32* {{.*}} seq_cst
    int r;
    __atomic_load(&i, &r, memory_order_seq_cst);
    // CHECK: store atomic i32 {{.*}} seq_cst
    r = 0;
    __atomic_store(&i, &r, memory_order_seq_cst);
  
    // CHECK: __atomic_fetch_add_8
    __atomic_fetch_add(&l, 1, memory_order_seq_cst);
    // CHECK: __atomic_fetch_sub_8
    __atomic_fetch_sub(&l, 1, memory_order_seq_cst);
    // CHECK: __atomic_load_8
    long long rl;
    __atomic_load(&l, &rl, memory_order_seq_cst);
    // CHECK: __atomic_store_8
    rl = 0;
    __atomic_store(&l, &rl, memory_order_seq_cst);
  }
  