| Chad Rosier | 8520429 | 2017-01-17 17:23:51 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -S -instsimplify | FileCheck %s |
| 2 | |
| 3 | declare i32 @llvm.bitreverse.i32(i32) |
| 4 | |
| 5 | ; CHECK-LABEL: @test1( |
| 6 | ; CHECK: ret i1 false |
| 7 | define i1 @test1(i32 %arg) { |
| 8 | %a = or i32 %arg, 1 |
| 9 | %b = call i32 @llvm.bitreverse.i32(i32 %a) |
| 10 | %res = icmp eq i32 %b, 0 |
| 11 | ret i1 %res |
| 12 | } |
| 13 | |
| 14 | ; CHECK-LABEL: @test2( |
| 15 | ; CHECK: ret i1 false |
| 16 | define i1 @test2(i32 %arg) { |
| 17 | %a = or i32 %arg, 1024 |
| 18 | %b = call i32 @llvm.bitreverse.i32(i32 %a) |
| 19 | %res = icmp eq i32 %b, 0 |
| 20 | ret i1 %res |
| 21 | } |
| 22 | |
| 23 | ; CHECK-LABEL: @test3( |
| 24 | ; CHECK: ret i1 false |
| 25 | define i1 @test3(i32 %arg) { |
| 26 | %a = and i32 %arg, 1 |
| 27 | %b = call i32 @llvm.bitreverse.i32(i32 %a) |
| 28 | %and = and i32 %b, 1 |
| 29 | %res = icmp eq i32 %and, 1 |
| 30 | ret i1 %res |
| 31 | } |