1; RUN: llc -mattr=avr6 < %s -mtriple=avr | FileCheck %s 2 3; Checks that atomic fences are simply removed from IR. 4; AVR is always singlethreaded so fences do nothing. 5 6; CHECK-LABEL: atomic_fence8 7; CHECK: ; %bb.0: 8; CHECK-NEXT: ret 9define void @atomic_fence8() { 10 fence acquire 11 ret void 12} 13 14