Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -emit-llvm %s -o - -std=gnu89 // rdar://7208839 extern inline int f1 (void) {return 1;} int f3 (void) {return f1();} int f1 (void) {return 0;}