1; RUN: llc < %s -march=x86 -mattr=+sse2 | not grep sfence 2; RUN: llc < %s -march=x86 -mattr=+sse2 | not grep lfence 3; RUN: llc < %s -march=x86 -mattr=+sse2 | not grep mfence 4; RUN: llc < %s -march=x86 -mattr=+sse2 | grep MEMBARRIER 5 6define void @test() { 7 fence acquire 8 fence release 9 fence acq_rel 10 ret void 11} 12