Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

gvar-init.ll
; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s

; Error out if initializer is given for address spaces that do not support initializers
; XFAIL: *
@g0 = addrspace(3) global i32 42