| James Molloy | b6be1eb | 2015-09-24 16:06:32 +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 = or i8 %p, 2 ; %1[1] = 1 | ||||
| 7 | %2 = and i8 %1, 254 ; %2[0] = 0, %2[1] = 1 | ||||
| 8 | %A = lshr i8 %2, 1 ; We should know that %A is nonzero. | ||||
| 9 | %x = icmp eq i8 %A, 0 | ||||
| 10 | ; CHECK: ret i1 false | ||||
| 11 | ret i1 %x | ||||
| 12 | } | ||||
| 13 | |||||
| 14 | !0 = !{ i8 1, i8 5 } | ||||