Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
@used1 = global i8 4 @used2 = global i32 123 @llvm.compiler.used = appending global [2 x i8*] [ i8* @used1, i8* bitcast (i32* @used2 to i8*) ], section "llvm.metadata"