third_party/llvm-7.0/llvm/test/Analysis/ValueTracking/knownnonzero-shift.ll

; RUN: opt -instsimplify -S < %s | FileCheck %s

; CHECK-LABEL: @test
define i1 @test(i8 %p, i8* %pq) {
  %q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits
  %1 = shl i8 %p, %q              ; because %q is nonzero, %1[0] is known to be zero.
  %2 = and i8 %1, 1
  %x = icmp eq i8 %2, 0
  ; CHECK: ret i1 true
  ret i1 %x
}

!0 = !{ i8 1, i8 5 }