Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

call2-ret0.ll
; RUN: llc < %s

define i32 @bar(i32 %x) {
        ret i32 0
}

define i32 @foo(i32 %x) {
        %q = call i32 @bar( i32 1 )             ; <i32> [#uses=1]
        ret i32 %q
}

define i32 @main() {
        %r = call i32 @foo( i32 2 )             ; <i32> [#uses=1]
        ret i32 %r
}