Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: not llvm-as < %s 2>&1 | FileCheck %s ; CHECK: invalid cast opcode for cast from '<4 x i64>' to 'i8' define i8 @foo(<4 x i64> %x) { %y = trunc <4 x i64> %x to i8 ret i8 %y }