Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: llc < %s -mtriple=i686-apple-darwin -mattr=+sse2 | FileCheck %s define void @test() { fence acquire ; CHECK: #MEMBARRIER fence release ; CHECK: #MEMBARRIER fence acq_rel ; CHECK: #MEMBARRIER ret void }