Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

half.ll
; RUN: llvm-as < %s | llvm-dis | FileCheck %s
; RUN: verify-uselistorder %s
; Basic smoke test for half type.

; CHECK: define half @halftest
define half  @halftest(half %A0) {
; CHECK: ret half %A0
        ret half %A0
}