Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

rv64zbe-invalid.s
# RUN: not llvm-mc -triple riscv64 -mattr=+experimental-zbe < %s 2>&1 | FileCheck %s

# Too few operands
bdecompressw t0, t1 # CHECK: :[[@LINE]]:1: error: too few operands for instruction
# Too few operands
bcompressw t0, t1 # CHECK: :[[@LINE]]:1: error: too few operands for instruction