| James Molloy | 493e57d | 2015-10-26 14:10:46 +0000 | [diff] [blame] | 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 } | ||||