Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
# RUN: llvm-mc --disassemble %s -triple=mips64-unknown-linux -mcpu=mips64r2 -mattr=+msa | FileCheck %s 0x78 0xb8 0xfc 0xd9 # CHECK: copy_s.d $19, $w31[0]