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      1 // RUN: %clang_cc1 %s -emit-llvm -o - -triple=arm64-apple-ios7 | FileCheck %s
      2 
      3 // Memory ordering values.
      4 enum {
      5   memory_order_relaxed = 0,
      6   memory_order_consume = 1,
      7   memory_order_acquire = 2,
      8   memory_order_release = 3,
      9   memory_order_acq_rel = 4,
     10   memory_order_seq_cst = 5
     11 };
     12 
     13 typedef struct { void *a, *b; } pointer_pair_t;
     14 typedef struct { void *a, *b, *c, *d; } pointer_quad_t;
     15 
     16 // rdar://13489679
     17 
     18 extern _Atomic(_Bool) a_bool;
     19 extern _Atomic(float) a_float;
     20 extern _Atomic(void*) a_pointer;
     21 extern _Atomic(pointer_pair_t) a_pointer_pair;
     22 extern _Atomic(pointer_quad_t) a_pointer_quad;
     23 
     24 // CHECK:    define void @test0()
     25 // CHECK:      [[TEMP:%.*]] = alloca i8, align 1
     26 // CHECK-NEXT: store i8 1, i8* [[TEMP]]
     27 // CHECK-NEXT: [[T0:%.*]] = load i8* [[TEMP]], align 1
     28 // CHECK-NEXT: store atomic i8 [[T0]], i8* @a_bool seq_cst, align 1
     29 void test0() {
     30   __c11_atomic_store(&a_bool, 1, memory_order_seq_cst);
     31 }
     32 
     33 // CHECK:    define void @test1()
     34 // CHECK:      [[TEMP:%.*]] = alloca float, align 4
     35 // CHECK-NEXT: store float 3.000000e+00, float* [[TEMP]]
     36 // CHECK-NEXT: [[T0:%.*]] = bitcast float* [[TEMP]] to i32*
     37 // CHECK-NEXT: [[T1:%.*]] = load i32* [[T0]], align 4
     38 // CHECK-NEXT: store atomic i32 [[T1]], i32* bitcast (float* @a_float to i32*) seq_cst, align 4
     39 void test1() {
     40   __c11_atomic_store(&a_float, 3, memory_order_seq_cst);
     41 }
     42 
     43 // CHECK:    define void @test2()
     44 // CHECK:      [[TEMP:%.*]] = alloca i8*, align 8
     45 // CHECK-NEXT: store i8* @a_bool, i8** [[TEMP]]
     46 // CHECK-NEXT: [[T0:%.*]] = bitcast i8** [[TEMP]] to i64*
     47 // CHECK-NEXT: [[T1:%.*]] = load i64* [[T0]], align 8
     48 // CHECK-NEXT: store atomic i64 [[T1]], i64* bitcast (i8** @a_pointer to i64*) seq_cst, align 8
     49 void test2() {
     50   __c11_atomic_store(&a_pointer, &a_bool, memory_order_seq_cst);
     51 }
     52 
     53 // CHECK:    define void @test3(
     54 // CHECK:      [[PAIR:%.*]] = alloca [[PAIR_T:%.*]], align 8
     55 // CHECK-NEXT: [[TEMP:%.*]] = alloca [[PAIR_T]], align 8
     56 // CHECK:      llvm.memcpy
     57 // CHECK-NEXT: [[T0:%.*]] = bitcast [[PAIR_T]]* [[TEMP]] to i128*
     58 // CHECK-NEXT: [[T1:%.*]] = load i128* [[T0]], align 16
     59 // CHECK-NEXT: store atomic i128 [[T1]], i128* bitcast ([[PAIR_T]]* @a_pointer_pair to i128*) seq_cst, align 16
     60 void test3(pointer_pair_t pair) {
     61   __c11_atomic_store(&a_pointer_pair, pair, memory_order_seq_cst);
     62 }
     63 
     64 // CHECK:    define void @test4([[QUAD_T:%.*]]*
     65 // CHECK:      [[TEMP:%.*]] = alloca [[QUAD_T:%.*]], align 8
     66 // CHECK-NEXT: [[T0:%.*]] = bitcast [[QUAD_T]]* [[TEMP]] to i8*
     67 // CHECK-NEXT: [[T1:%.*]] = bitcast [[QUAD_T]]* {{%.*}} to i8*
     68 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T0]], i8* [[T1]], i64 32, i32 8, i1 false)
     69 // CHECK-NEXT: [[T0:%.*]] = bitcast [[QUAD_T]]* [[TEMP]] to i8*
     70 // CHECK-NEXT: call void @__atomic_store(i64 32, i8* bitcast ([[QUAD_T]]* @a_pointer_quad to i8*), i8* [[T0]], i32 5)
     71 void test4(pointer_quad_t quad) {
     72   __c11_atomic_store(&a_pointer_quad, quad, memory_order_seq_cst);
     73 }
     74