1; Ensure that adjacent duplicated barriers are not removed at -O0. 2; RUN: llc -O0 < %s -mtriple=armv7 -mattr=+db | FileCheck %s 3 4define i32 @t1() { 5entry: 6 fence seq_cst 7 fence seq_cst 8 fence seq_cst 9 ret i32 0 10} 11 12; CHECK: @ BB#0: @ %entry 13; CHECK-NEXT: dmb ish 14; CHECK-NEXT: dmb ish 15; CHECK-NEXT: dmb ish 16