Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s int a(); // CHECK: call noundef i32 @_Z1av() struct x {int x, y : 10;} x = {1, a()};