; RUN: llc < %s -mtriple=thumbv6-apple-darwin | FileCheck %s -check-prefix=V6
; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mattr=-db | FileCheck %s -check-prefix=V6
-; RUN: llc < %s -march=thumb -mattr=+v6m | FileCheck %s -check-prefix=V6M
-
-declare void @llvm.memory.barrier(i1 , i1 , i1 , i1 , i1)
+; RUN: llc < %s -march=thumb -mcpu=cortex-m0 | FileCheck %s -check-prefix=V6M
define void @t1() {
-; V6: t1:
-; V6: blx {{_*}}sync_synchronize
-
-; V6M: t1:
-; V6M: dmb st
- call void @llvm.memory.barrier(i1 false, i1 false, i1 false, i1 true, i1 true)
- ret void
-}
-
-define void @t2() {
-; V6: t2:
+; V6-LABEL: t1:
; V6: blx {{_*}}sync_synchronize
-; V6M: t2:
-; V6M: dmb ish
- call void @llvm.memory.barrier(i1 true, i1 false, i1 false, i1 true, i1 false)
+; V6M-LABEL: t1:
+; V6M: dmb sy
+ fence seq_cst
ret void
}