Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: opt -S -inferattrs < %s | FileCheck %s ; CHECK: Function Attrs: nobuiltin allocsize(0){{$}} ; CHECK: declare i8* @_Znwm(i32) declare i8* @_Znwm(i32) nobuiltin allocsize(0)