Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

align-arm-apcs.c
// RUN: %clang_cc1 -triple arm-unknown-unknown -target-abi apcs-gnu -fsyntax-only -verify %s
// expected-no-diagnostics

struct s0 { double f0; int f1; };
char chk0[__alignof__(struct s0) == 4 ? 1 : -1];