Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

2003-08-20-OpaqueTypeResolve.ll
; RUN: llvm-as < %s > %t.out1.bc
; RUN: echo "%M = type { i32, i32* } " | llvm-as > %t.out2.bc
; RUN: llvm-link %t.out1.bc %t.out2.bc

%M = type { i32, %N* }
%N = type opaque

;%X = global { int, %N* } { int 5, %N* null }