1; RUN: llc < %s -mtriple=armv7-apple-darwin -verify-machineinstrs   | FileCheck %s -check-prefix=ARM
2; RUN: llc < %s -mtriple=thumbv7-apple-darwin -verify-machineinstrs | FileCheck %s -check-prefix=T2
3; rdar://8964854
4
5define i8 @t(i8* %a, i8 %b, i8 %c) nounwind {
6; ARM-LABEL: t:
7; ARM: ldrexb
8; ARM: strexb
9; ARM: clrex
10
11; T2-LABEL: t:
12; T2: strexb
13; T2: ldrexb
14; T2: clrex
15  %tmp0 = cmpxchg i8* %a, i8 %b, i8 %c monotonic monotonic
16  %tmp1 = extractvalue { i8, i1 } %tmp0, 0
17  ret i8 %tmp1
18}
19