Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: opt < %s -passes=instcombine -S | grep "ret i1 false" ; PR2697 define i1 @x(i32 %x) nounwind { %div = sdiv i32 %x, 65536 ; <i32> [#uses=1] %cmp = icmp slt i32 %div, -65536 ret i1 %cmp }