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      1 ; RUN: opt < %s -loweratomic -S | FileCheck %s
      2 
      3 declare void @llvm.memory.barrier(i1 %ll, i1 %ls, i1 %sl, i1 %ss, i1 %device)
      4 
      5 define void @barrier() {
      6 ; CHECK: @barrier
      7   call void @llvm.memory.barrier(i1 0, i1 0, i1 0, i1 0, i1 0)
      8 ; CHECK-NEXT: ret
      9   ret void
     10 }
     11