1; RUN: llc -mtriple=thumbv6-apple-darwin %s -o - | FileCheck %s -check-prefix=V6 2; RUN: llc -mtriple=thumbv7-apple-darwin -mattr=-db %s -o - | FileCheck %s -check-prefix=V6 3; RUN: llc -mtriple=thumb-eabi -mcpu=cortex-m0 %s -o - | FileCheck %s -check-prefix=V6M 4 5define void @t1() { 6; V6-LABEL: t1: 7; V6: bl {{_*}}sync_synchronize 8 9; V6M-LABEL: t1: 10; V6M: dmb sy 11 fence seq_cst 12 ret void 13} 14