Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: not llvm-as < %s > /dev/null 2>&1 declare i32 @v() define i32 @f() { e: %r = invoke i32 @v() to label %c unwind label %u ; <i32> [#uses=2] c: ; preds = %e ret i32 %r u: ; preds = %e ret i32 %r }