Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

invalid-datalayout4.ll
; RUN: not llvm-as < %s 2>&1 | FileCheck %s
target datalayout = "p16777216:64:64:64"
; CHECK: Invalid address space, must be a 24bit integer