Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

arm64-fp-encoding-error.s
; RUN: not llvm-mc -triple arm64-apple-ios8.0 %s -o /dev/null 2>&1 | FileCheck %s

        fmov s0, #-0.0
; CHECK: error: expected compatible register or floating-point constant

        fmov d0, #-0.0
; CHECK: error: expected compatible register or floating-point constant