Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
# RUN: llvm-mc -triple arm64 -mattr=neon -disassemble < %s | FileCheck %s 0x00 0x00 0xae 0x9e 0x00 0x00 0xaf 0x9e # CHECK: fmov x0, v0.d[1] # CHECK: fmov v0.d[1], x0