1; RUN: opt < %s -loweratomic -S | FileCheck %s
2
3define i8 @cmpswap() {
4; CHECK-LABEL: @cmpswap(
5  %i = alloca i8
6  %pair = cmpxchg i8* %i, i8 0, i8 42 monotonic monotonic
7  %j = extractvalue { i8, i1 } %pair, 0
8; CHECK: [[OLDVAL:%[a-z0-9]+]] = load i8, i8* [[ADDR:%[a-z0-9]+]]
9; CHECK-NEXT: [[SAME:%[a-z0-9]+]] = icmp eq i8 [[OLDVAL]], 0
10; CHECK-NEXT: [[TO_STORE:%[a-z0-9]+]] = select i1 [[SAME]], i8 42, i8 [[OLDVAL]]
11; CHECK-NEXT: store i8 [[TO_STORE]], i8* [[ADDR]]
12; CHECK-NEXT: [[TMP:%[a-z0-9]+]] = insertvalue { i8, i1 } undef, i8 [[OLDVAL]], 0
13; CHECK-NEXT: [[RES:%[a-z0-9]+]] = insertvalue { i8, i1 } [[TMP]], i1 [[SAME]], 1
14; CHECK-NEXT: [[VAL:%[a-z0-9]+]] = extractvalue { i8, i1 } [[RES]], 0
15  ret i8 %j
16; CHECK: ret i8 [[VAL]]
17}
18
19
20define i8 @swap() {
21; CHECK-LABEL: @swap(
22  %i = alloca i8
23  %j = atomicrmw xchg i8* %i, i8 42 monotonic
24; CHECK: [[INST:%[a-z0-9]+]] = load
25; CHECK-NEXT: store
26  ret i8 %j
27; CHECK: ret i8 [[INST]]
28}
29
30
31define i8 @swap_optnone() noinline optnone {
32; CHECK-LABEL: @swap_optnone(
33  %i = alloca i8
34  %j = atomicrmw xchg i8* %i, i8 42 monotonic
35; CHECK: [[INST:%[a-z0-9]+]] = load
36; CHECK-NEXT: store
37  ret i8 %j
38; CHECK: ret i8 [[INST]]
39}
40