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 ; CHECK: select define double @fold(i1 %a, double %b) { %s = select i1 %a, double 0., double 1. %c = fdiv double %b, %s ret double %c }