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1; RUN: opt -S < %s -passes=instcombine | FileCheck %s2 3declare void @llvm.sideeffect()4 5; Don't DCE llvm.sideeffect calls.6 7; CHECK-LABEL: dce8; CHECK: call void @llvm.sideeffect()9define void @dce() {10    call void @llvm.sideeffect()11    ret void12}13