Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

cmp-immediate-fixup2.s
@ PR18931
@ RUN: llvm-mc < %s -triple=arm-linux-gnueabi -filetype=obj -o - \
@ RUN: | llvm-objdump -d --arch=arm - | FileCheck %s

    .text
@ CHECK: cmp r2, #0
    cmp r2, #(l2 - l1)
l1:
l2: