1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -S -instcombine | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; Note: This is testing functionality in computeKnownBits. I'd have rather 3*9880d681SAndroid Build Coastguard Worker; used instsimplify, but the bit test folding is apparently only in instcombine. 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Workerdeclare i16 @llvm.bswap.i16(i16) 6*9880d681SAndroid Build Coastguard Workerdeclare i32 @llvm.bswap.i32(i32) 7*9880d681SAndroid Build Coastguard Worker 8*9880d681SAndroid Build Coastguard Workerdefine i1 @test1(i16 %arg) { 9*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test1 10*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true 11*9880d681SAndroid Build Coastguard Worker %a = or i16 %arg, 511 12*9880d681SAndroid Build Coastguard Worker %b = call i16 @llvm.bswap.i16(i16 %a) 13*9880d681SAndroid Build Coastguard Worker %and = and i16 %b, 256 14*9880d681SAndroid Build Coastguard Worker %res = icmp eq i16 %and, 256 15*9880d681SAndroid Build Coastguard Worker ret i1 %res 16*9880d681SAndroid Build Coastguard Worker} 17*9880d681SAndroid Build Coastguard Worker 18*9880d681SAndroid Build Coastguard Workerdefine i1 @test2(i16 %arg) { 19*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test2 20*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true 21*9880d681SAndroid Build Coastguard Worker %a = or i16 %arg, 1 22*9880d681SAndroid Build Coastguard Worker %b = call i16 @llvm.bswap.i16(i16 %a) 23*9880d681SAndroid Build Coastguard Worker %and = and i16 %b, 256 24*9880d681SAndroid Build Coastguard Worker %res = icmp eq i16 %and, 256 25*9880d681SAndroid Build Coastguard Worker ret i1 %res 26*9880d681SAndroid Build Coastguard Worker} 27*9880d681SAndroid Build Coastguard Worker 28*9880d681SAndroid Build Coastguard Worker 29*9880d681SAndroid Build Coastguard Workerdefine i1 @test3(i16 %arg) { 30*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test3 31*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true 32*9880d681SAndroid Build Coastguard Worker %a = or i16 %arg, 256 33*9880d681SAndroid Build Coastguard Worker %b = call i16 @llvm.bswap.i16(i16 %a) 34*9880d681SAndroid Build Coastguard Worker %and = and i16 %b, 1 35*9880d681SAndroid Build Coastguard Worker %res = icmp eq i16 %and, 1 36*9880d681SAndroid Build Coastguard Worker ret i1 %res 37*9880d681SAndroid Build Coastguard Worker} 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard Workerdefine i1 @test4(i32 %arg) { 40*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test4 41*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true 42*9880d681SAndroid Build Coastguard Worker %a = or i32 %arg, 2147483647 ; i32_MAX 43*9880d681SAndroid Build Coastguard Worker %b = call i32 @llvm.bswap.i32(i32 %a) 44*9880d681SAndroid Build Coastguard Worker %and = and i32 %b, 127 45*9880d681SAndroid Build Coastguard Worker %res = icmp eq i32 %and, 127 46*9880d681SAndroid Build Coastguard Worker ret i1 %res 47*9880d681SAndroid Build Coastguard Worker} 48