Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

directive_desc.s
# RUN: llvm-mc -triple i386-apple-darwin9 %s | FileCheck %s

# CHECK: TEST0:
# CHECK: .desc foo,16
# CHECK: .desc bar,4
TEST0:  
	.desc foo,0x10
	.desc     bar, 1 +3