Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: llc -mtriple=aarch64-unknown-unknown -global-isel -global-isel-abort=2 -verify-machineinstrs %s -o - 2>&1 | FileCheck %s ; CHECK-NOT: fallback ; CHECK: empty define void @empty() { ret void }