Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

armv8.5a-sb-error.s
// RUN: not llvm-mc -triple armv8 -show-encoding -mattr=+sb < %s 2>&1 | FileCheck %s

sbeq

// CHECK: instruction 'sb' is not predicable