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1; RUN: llc -mattr=avr6 < %s -mtriple=avr | FileCheck %s2 3; Checks that atomic fences are simply removed from IR.4; AVR is always singlethreaded so fences do nothing.5 6; CHECK-LABEL: atomic_fence87; CHECK: ; %bb.0:8; CHECK-NEXT: ret9define void @atomic_fence8() {10 fence acquire11 ret void12}13 14