1 ; RUN: opt -instsimplify -S < %s | FileCheck %s 2 3 ; CHECK-LABEL: @test 4 define i1 @test(i8 %p, i8* %pq) { 5 %q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits 6 %1 = shl i8 %p, %q ; because %q is nonzero, %1[0] is known to be zero. 7 %2 = and i8 %1, 1 8 %x = icmp eq i8 %2, 0 9 ; CHECK: ret i1 true 10 ret i1 %x 11 } 12 13 !0 = !{ i8 1, i8 5 } 14
