| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| public class Main { |
| |
| public static void assertIntEquals(int expected, int result) { |
| if (expected != result) { |
| throw new Error("Expected: " + expected + ", found: " + result); |
| } |
| } |
| |
| public static void assertLongEquals(long expected, long result) { |
| if (expected != result) { |
| throw new Error("Expected: " + expected + ", found: " + result); |
| } |
| } |
| |
| /** |
| * Tiny programs exercising optimizations of arithmetic identities. |
| */ |
| |
| // CHECK-START: long Main.Add0(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:j\d+]] LongConstant 0 |
| // CHECK-DAG: [[Add:j\d+]] Add [ [[Const0]] [[Arg]] ] |
| // CHECK-DAG: Return [ [[Add]] ] |
| |
| // CHECK-START: long Main.Add0(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: Add |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long Add0(long arg) { |
| return 0 + arg; |
| } |
| |
| // CHECK-START: int Main.AndAllOnes(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[ConstF:i\d+]] IntConstant -1 |
| // CHECK-DAG: [[And:i\d+]] And [ [[Arg]] [[ConstF]] ] |
| // CHECK-DAG: Return [ [[And]] ] |
| |
| // CHECK-START: int Main.AndAllOnes(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-NOT: And |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static int AndAllOnes(int arg) { |
| return arg & -1; |
| } |
| |
| // CHECK-START: long Main.Div1(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const1:j\d+]] LongConstant 1 |
| // CHECK-DAG: [[Div:j\d+]] Div [ [[Arg]] [[Const1]] ] |
| // CHECK-DAG: Return [ [[Div]] ] |
| |
| // CHECK-START: long Main.Div1(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: Div |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long Div1(long arg) { |
| return arg / 1; |
| } |
| |
| // CHECK-START: int Main.DivN1(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[ConstN1:i\d+]] IntConstant -1 |
| // CHECK-DAG: [[Div:i\d+]] Div [ [[Arg]] [[ConstN1]] ] |
| // CHECK-DAG: Return [ [[Div]] ] |
| |
| // CHECK-START: int Main.DivN1(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Neg:i\d+]] Neg [ [[Arg]] ] |
| // CHECK-NOT: Div |
| // CHECK-DAG: Return [ [[Neg]] ] |
| |
| public static int DivN1(int arg) { |
| return arg / -1; |
| } |
| |
| // CHECK-START: long Main.Mul1(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const1:j\d+]] LongConstant 1 |
| // CHECK-DAG: [[Mul:j\d+]] Mul [ [[Arg]] [[Const1]] ] |
| // CHECK-DAG: Return [ [[Mul]] ] |
| |
| // CHECK-START: long Main.Mul1(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: Mul |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long Mul1(long arg) { |
| return arg * 1; |
| } |
| |
| // CHECK-START: int Main.MulN1(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[ConstN1:i\d+]] IntConstant -1 |
| // CHECK-DAG: [[Mul:i\d+]] Mul [ [[Arg]] [[ConstN1]] ] |
| // CHECK-DAG: Return [ [[Mul]] ] |
| |
| // CHECK-START: int Main.MulN1(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Neg:i\d+]] Neg [ [[Arg]] ] |
| // CHECK-NOT: Mul |
| // CHECK-DAG: Return [ [[Neg]] ] |
| |
| public static int MulN1(int arg) { |
| return arg * -1; |
| } |
| |
| // CHECK-START: long Main.MulPowerOfTwo128(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const128:j\d+]] LongConstant 128 |
| // CHECK-DAG: [[Mul:j\d+]] Mul [ [[Arg]] [[Const128]] ] |
| // CHECK-DAG: Return [ [[Mul]] ] |
| |
| // CHECK-START: long Main.MulPowerOfTwo128(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const7:i\d+]] IntConstant 7 |
| // CHECK-DAG: [[Shl:j\d+]] Shl [ [[Arg]] [[Const7]] ] |
| // CHECK-NOT: Mul |
| // CHECK-DAG: Return [ [[Shl]] ] |
| |
| public static long MulPowerOfTwo128(long arg) { |
| return arg * 128; |
| } |
| |
| // CHECK-START: int Main.Or0(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:i\d+]] IntConstant 0 |
| // CHECK-DAG: [[Or:i\d+]] Or [ [[Arg]] [[Const0]] ] |
| // CHECK-DAG: Return [ [[Or]] ] |
| |
| // CHECK-START: int Main.Or0(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-NOT: Or |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static int Or0(int arg) { |
| return arg | 0; |
| } |
| |
| // CHECK-START: long Main.OrSame(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Or:j\d+]] Or [ [[Arg]] [[Arg]] ] |
| // CHECK-DAG: Return [ [[Or]] ] |
| |
| // CHECK-START: long Main.OrSame(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: Or |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long OrSame(long arg) { |
| return arg | arg; |
| } |
| |
| // CHECK-START: int Main.Shl0(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:i\d+]] IntConstant 0 |
| // CHECK-DAG: [[Shl:i\d+]] Shl [ [[Arg]] [[Const0]] ] |
| // CHECK-DAG: Return [ [[Shl]] ] |
| |
| // CHECK-START: int Main.Shl0(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-NOT: Shl |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static int Shl0(int arg) { |
| return arg << 0; |
| } |
| |
| // CHECK-START: long Main.Shr0(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:i\d+]] IntConstant 0 |
| // CHECK-DAG: [[Shr:j\d+]] Shr [ [[Arg]] [[Const0]] ] |
| // CHECK-DAG: Return [ [[Shr]] ] |
| |
| // CHECK-START: long Main.Shr0(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: Shr |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long Shr0(long arg) { |
| return arg >> 0; |
| } |
| |
| // CHECK-START: long Main.Sub0(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:j\d+]] LongConstant 0 |
| // CHECK-DAG: [[Sub:j\d+]] Sub [ [[Arg]] [[Const0]] ] |
| // CHECK-DAG: Return [ [[Sub]] ] |
| |
| // CHECK-START: long Main.Sub0(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: Sub |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long Sub0(long arg) { |
| return arg - 0; |
| } |
| |
| // CHECK-START: int Main.SubAliasNeg(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:i\d+]] IntConstant 0 |
| // CHECK-DAG: [[Sub:i\d+]] Sub [ [[Const0]] [[Arg]] ] |
| // CHECK-DAG: Return [ [[Sub]] ] |
| |
| // CHECK-START: int Main.SubAliasNeg(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Neg:i\d+]] Neg [ [[Arg]] ] |
| // CHECK-NOT: Sub |
| // CHECK-DAG: Return [ [[Neg]] ] |
| |
| public static int SubAliasNeg(int arg) { |
| return 0 - arg; |
| } |
| |
| // CHECK-START: long Main.UShr0(long) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:i\d+]] IntConstant 0 |
| // CHECK-DAG: [[UShr:j\d+]] UShr [ [[Arg]] [[Const0]] ] |
| // CHECK-DAG: Return [ [[UShr]] ] |
| |
| // CHECK-START: long Main.UShr0(long) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:j\d+]] ParameterValue |
| // CHECK-NOT: UShr |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static long UShr0(long arg) { |
| return arg >>> 0; |
| } |
| |
| // CHECK-START: int Main.Xor0(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Const0:i\d+]] IntConstant 0 |
| // CHECK-DAG: [[Xor:i\d+]] Xor [ [[Arg]] [[Const0]] ] |
| // CHECK-DAG: Return [ [[Xor]] ] |
| |
| // CHECK-START: int Main.Xor0(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-NOT: Xor |
| // CHECK-DAG: Return [ [[Arg]] ] |
| |
| public static int Xor0(int arg) { |
| return arg ^ 0; |
| } |
| |
| // CHECK-START: int Main.XorAllOnes(int) instruction_simplifier (before) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[ConstF:i\d+]] IntConstant -1 |
| // CHECK-DAG: [[Xor:i\d+]] Xor [ [[Arg]] [[ConstF]] ] |
| // CHECK-DAG: Return [ [[Xor]] ] |
| |
| // CHECK-START: int Main.XorAllOnes(int) instruction_simplifier (after) |
| // CHECK-DAG: [[Arg:i\d+]] ParameterValue |
| // CHECK-DAG: [[Not:i\d+]] Not [ [[Arg]] ] |
| // CHECK-NOT: Xor |
| // CHECK-DAG: Return [ [[Not]] ] |
| |
| public static int XorAllOnes(int arg) { |
| return arg ^ -1; |
| } |
| |
| public static void main(String[] args) { |
| int arg = 123456; |
| |
| assertLongEquals(Add0(arg), arg); |
| assertIntEquals(AndAllOnes(arg), arg); |
| assertLongEquals(Div1(arg), arg); |
| assertIntEquals(DivN1(arg), -arg); |
| assertLongEquals(Mul1(arg), arg); |
| assertIntEquals(MulN1(arg), -arg); |
| assertLongEquals(MulPowerOfTwo128(arg), (128 * arg)); |
| assertIntEquals(Or0(arg), arg); |
| assertLongEquals(OrSame(arg), arg); |
| assertIntEquals(Shl0(arg), arg); |
| assertLongEquals(Shr0(arg), arg); |
| assertLongEquals(Sub0(arg), arg); |
| assertIntEquals(SubAliasNeg(arg), -arg); |
| assertLongEquals(UShr0(arg), arg); |
| assertIntEquals(Xor0(arg), arg); |
| assertIntEquals(XorAllOnes(arg), ~arg); |
| } |
| } |
