Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

2007-05-18-CastFoldBug.ll
; RUN: opt < %s -passes=instcombine -S | grep "call.*sret"
; Make sure instcombine doesn't drop the sret attribute.

define void @blah(i16* %tmp10) {
entry:
	call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend_stret to void (i16*)*)(i16* sret(i16) %tmp10)
	ret void
}

declare i8* @objc_msgSend_stret(i8*, i8*, ...)