1; RUN: llc < %s -mtriple=armv7-apple-ios -verify-machineinstrs | FileCheck %s
2
3define void @test_cmpxchg_weak(i32 *%addr, i32 %desired, i32 %new) {
4; CHECK-LABEL: test_cmpxchg_weak:
5
6  %pair = cmpxchg weak i32* %addr, i32 %desired, i32 %new seq_cst monotonic
7  %oldval = extractvalue { i32, i1 } %pair, 0
8; CHECK:     dmb ish
9; CHECK:     ldrex   [[LOADED:r[0-9]+]], [r0]
10; CHECK:     cmp     [[LOADED]], r1
11; CHECK:     strexeq [[SUCCESS:r[0-9]+]], r2, [r0]
12; CHECK:     cmpeq   [[SUCCESS]], #0
13; CHECK:     bne     [[DONE:LBB[0-9]+_[0-9]+]]
14; CHECK:     dmb     ish
15; CHECK: [[DONE]]:
16; CHECK:     str     r3, [r0]
17; CHECK:     bx      lr
18
19  store i32 %oldval, i32* %addr
20  ret void
21}
22
23
24define i1 @test_cmpxchg_weak_to_bool(i32, i32 *%addr, i32 %desired, i32 %new) {
25; CHECK-LABEL: test_cmpxchg_weak_to_bool:
26
27  %pair = cmpxchg weak i32* %addr, i32 %desired, i32 %new seq_cst monotonic
28  %success = extractvalue { i32, i1 } %pair, 1
29
30; CHECK:      dmb     ish
31; CHECK:      mov     r0, #0
32; CHECK:      ldrex   [[LOADED:r[0-9]+]], [r1]
33; CHECK:      cmp     [[LOADED]], r2
34; CHECK:      strexeq [[STATUS:r[0-9]+]], r3, [r1]
35; CHECK:      cmpeq   [[STATUS]], #0
36; CHECK:      bne     [[DONE:LBB[0-9]+_[0-9]+]]
37; CHECK:      dmb     ish
38; CHECK:      mov     r0, #1
39; CHECK: [[DONE]]:
40; CHECK:      bx      lr
41
42  ret i1 %success
43}
44