1; RUN: llc -mtriple=aarch64-apple-ios7.0 -o - %s | FileCheck %s
2
3define i32 @test_return(i32* %p, i32 %oldval, i32 %newval) {
4; CHECK-LABEL: test_return:
5
6; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]:
7; CHECK: ldaxr [[LOADED:w[0-9]+]], [x0]
8; CHECK: cmp [[LOADED]], w1
9; CHECK: b.ne [[FAILED:LBB[0-9]+_[0-9]+]]
10
11; CHECK: stlxr [[STATUS:w[0-9]+]], {{w[0-9]+}}, [x0]
12; CHECK: cbnz [[STATUS]], [[LOOP]]
13
14; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
15; CHECK: orr w0, wzr, #0x1
16; CHECK: ret
17
18; CHECK: [[FAILED]]:
19; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
20; CHECK: mov w0, wzr
21; CHECK: ret
22
23  %pair = cmpxchg i32* %p, i32 %oldval, i32 %newval seq_cst seq_cst
24  %success = extractvalue { i32, i1 } %pair, 1
25  %conv = zext i1 %success to i32
26  ret i32 %conv
27}
28
29define i1 @test_return_bool(i8* %value, i8 %oldValue, i8 %newValue) {
30; CHECK-LABEL: test_return_bool:
31
32; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]:
33; CHECK: ldaxrb [[LOADED:w[0-9]+]], [x0]
34; CHECK: cmp [[LOADED]], w1, uxtb
35; CHECK: b.ne [[FAILED:LBB[0-9]+_[0-9]+]]
36
37; CHECK: stlxrb [[STATUS:w[0-9]+]], {{w[0-9]+}}, [x0]
38; CHECK: cbnz [[STATUS]], [[LOOP]]
39
40; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
41  ; FIXME: DAG combine should be able to deal with this.
42; CHECK: orr [[TMP:w[0-9]+]], wzr, #0x1
43; CHECK: eor w0, [[TMP]], #0x1
44; CHECK: ret
45
46; CHECK: [[FAILED]]:
47; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
48; CHECK: mov [[TMP:w[0-9]+]], wzr
49; CHECK: eor w0, [[TMP]], #0x1
50; CHECK: ret
51
52  %pair = cmpxchg i8* %value, i8 %oldValue, i8 %newValue acq_rel monotonic
53  %success = extractvalue { i8, i1 } %pair, 1
54  %failure = xor i1 %success, 1
55  ret i1 %failure
56}
57
58define void @test_conditional(i32* %p, i32 %oldval, i32 %newval) {
59; CHECK-LABEL: test_conditional:
60
61; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]:
62; CHECK: ldaxr [[LOADED:w[0-9]+]], [x0]
63; CHECK: cmp [[LOADED]], w1
64; CHECK: b.ne [[FAILED:LBB[0-9]+_[0-9]+]]
65
66; CHECK: stlxr [[STATUS:w[0-9]+]], w2, [x0]
67; CHECK: cbnz [[STATUS]], [[LOOP]]
68
69; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
70; CHECK: b _bar
71
72; CHECK: [[FAILED]]:
73; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
74; CHECK: b _baz
75
76  %pair = cmpxchg i32* %p, i32 %oldval, i32 %newval seq_cst seq_cst
77  %success = extractvalue { i32, i1 } %pair, 1
78  br i1 %success, label %true, label %false
79
80true:
81  tail call void @bar() #2
82  br label %end
83
84false:
85  tail call void @baz() #2
86  br label %end
87
88end:
89  ret void
90}
91
92declare void @bar()
93declare void @baz()
94