Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: opt < %s -passes=instcombine -S | FileCheck %s ; PR1933 ; CHECK: rem define i32 @fold(i32 %a) { %s = mul i32 %a, 3 %c = urem i32 %s, 3 ret i32 %c }