Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -triple arm64-none-linux -emit-llvm -w -o - %s | FileCheck -check-prefix=PCS %s // PCS: define{{.*}} void @{{.*}}(i8 %a struct s0 {}; void f0(s0 a) {}