1 ; RUN: llc -verify-machineinstrs -mtriple=aarch64-linux-gnu -O0 -fast-isel=0 -global-isel=false %s -o - | FileCheck %s
3 define { i8, i1 } @test_cmpxchg_8(i8* %addr, i8 %desired, i8 %new) nounwind {
4 ; CHECK-LABEL: test_cmpxchg_8:
5 ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
6 ; CHECK: mov [[STATUS:w[3-9]+]], #0
7 ; CHECK: ldaxrb [[OLD:w[0-9]+]], [x0]
8 ; CHECK: cmp [[OLD]], w1, uxtb
9 ; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
10 ; CHECK: stlxrb [[STATUS]], w2, [x0]
11 ; CHECK: cbnz [[STATUS]], [[RETRY]]
13 ; CHECK: subs {{w[0-9]+}}, [[OLD]], w1
14 ; CHECK: cset {{w[0-9]+}}, eq
15 %res = cmpxchg i8* %addr, i8 %desired, i8 %new seq_cst monotonic
19 define { i16, i1 } @test_cmpxchg_16(i16* %addr, i16 %desired, i16 %new) nounwind {
20 ; CHECK-LABEL: test_cmpxchg_16:
21 ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
22 ; CHECK: mov [[STATUS:w[3-9]+]], #0
23 ; CHECK: ldaxrh [[OLD:w[0-9]+]], [x0]
24 ; CHECK: cmp [[OLD]], w1, uxth
25 ; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
26 ; CHECK: stlxrh [[STATUS:w[3-9]]], w2, [x0]
27 ; CHECK: cbnz [[STATUS]], [[RETRY]]
29 ; CHECK: subs {{w[0-9]+}}, [[OLD]], w1
30 ; CHECK: cset {{w[0-9]+}}, eq
31 %res = cmpxchg i16* %addr, i16 %desired, i16 %new seq_cst monotonic
35 define { i32, i1 } @test_cmpxchg_32(i32* %addr, i32 %desired, i32 %new) nounwind {
36 ; CHECK-LABEL: test_cmpxchg_32:
37 ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
38 ; CHECK: mov [[STATUS:w[3-9]+]], #0
39 ; CHECK: ldaxr [[OLD:w[0-9]+]], [x0]
40 ; CHECK: cmp [[OLD]], w1
41 ; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
42 ; CHECK: stlxr [[STATUS]], w2, [x0]
43 ; CHECK: cbnz [[STATUS]], [[RETRY]]
45 ; CHECK: subs {{w[0-9]+}}, [[OLD]], w1
46 ; CHECK: cset {{w[0-9]+}}, eq
47 %res = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst monotonic
51 define { i64, i1 } @test_cmpxchg_64(i64* %addr, i64 %desired, i64 %new) nounwind {
52 ; CHECK-LABEL: test_cmpxchg_64:
53 ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
54 ; CHECK: mov [[STATUS:w[3-9]+]], #0
55 ; CHECK: ldaxr [[OLD:x[0-9]+]], [x0]
56 ; CHECK: cmp [[OLD]], x1
57 ; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
58 ; CHECK: stlxr [[STATUS]], x2, [x0]
59 ; CHECK: cbnz [[STATUS]], [[RETRY]]
61 ; CHECK: subs {{x[0-9]+}}, [[OLD]], x1
62 ; CHECK: cset {{w[0-9]+}}, eq
63 %res = cmpxchg i64* %addr, i64 %desired, i64 %new seq_cst monotonic
67 define { i128, i1 } @test_cmpxchg_128(i128* %addr, i128 %desired, i128 %new) nounwind {
68 ; CHECK-LABEL: test_cmpxchg_128:
69 ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
70 ; CHECK: ldaxp [[OLD_LO:x[0-9]+]], [[OLD_HI:x[0-9]+]], [x0]
71 ; CHECK: cmp [[OLD_LO]], x2
72 ; CHECK: cset [[CMP_TMP:w[0-9]+]], ne
73 ; CHECK: cmp [[OLD_HI]], x3
74 ; CHECK: cinc [[CMP:w[0-9]+]], [[CMP_TMP]], ne
75 ; CHECK: cbnz [[CMP]], [[DONE:.LBB[0-9]+_[0-9]+]]
76 ; CHECK: stlxp [[STATUS:w[0-9]+]], x4, x5, [x0]
77 ; CHECK: cbnz [[STATUS]], [[RETRY]]
79 %res = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst monotonic
83 ; Original implementation assumed the desired & new arguments had already been
84 ; type-legalized into some kind of BUILD_PAIR operation and crashed when this
86 @var128 = global i128 0
87 define {i128, i1} @test_cmpxchg_128_unsplit(i128* %addr) {
88 ; CHECK-LABEL: test_cmpxchg_128_unsplit:
89 ; CHECK: add x[[VAR128:[0-9]+]], {{x[0-9]+}}, :lo12:var128
90 ; CHECK: ldr [[DESIRED_HI:x[0-9]+]], [x[[VAR128]], #8]
91 ; CHECK: ldr [[DESIRED_LO:x[0-9]+]], [x[[VAR128]]]
92 ; CHECK: ldr [[NEW_HI:x[0-9]+]], [x[[VAR128]], #8]
93 ; CHECK: ldr [[NEW_LO:x[0-9]+]], [x[[VAR128]]]
94 ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
95 ; CHECK: ldaxp [[OLD_LO:x[0-9]+]], [[OLD_HI:x[0-9]+]], [x0]
96 ; CHECK: cmp [[OLD_LO]], [[DESIRED_LO]]
97 ; CHECK: cset [[CMP_TMP:w[0-9]+]], ne
98 ; CHECK: cmp [[OLD_HI]], [[DESIRED_HI]]
99 ; CHECK: cinc [[CMP:w[0-9]+]], [[CMP_TMP]], ne
100 ; CHECK: cbnz [[CMP]], [[DONE:.LBB[0-9]+_[0-9]+]]
101 ; CHECK: stlxp [[STATUS:w[0-9]+]], [[NEW_LO]], [[NEW_HI]], [x0]
102 ; CHECK: cbnz [[STATUS]], [[RETRY]]
105 %desired = load volatile i128, i128* @var128
106 %new = load volatile i128, i128* @var128
107 %val = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
108 ret { i128, i1 } %val