| /* |
| * 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 { |
| |
| // Note #1: `javac` flips the conditions of If statements. |
| // Note #2: In the optimizing compiler, the first input of Phi is always |
| // the fall-through path, i.e. the false branch. |
| |
| public static void assertBoolEquals(boolean expected, boolean result) { |
| if (expected != result) { |
| throw new Error("Expected: " + expected + ", found: " + result); |
| } |
| } |
| |
| public static void assertIntEquals(int expected, int result) { |
| if (expected != result) { |
| throw new Error("Expected: " + expected + ", found: " + result); |
| } |
| } |
| |
| /* |
| * Elementary test negating a boolean. Verifies that blocks are merged and |
| * empty branches removed. |
| */ |
| |
| /// CHECK-START: boolean Main.BooleanNot(boolean) select_generator (before) |
| /// CHECK-DAG: <<Param:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: If [<<Param>>] |
| /// CHECK-DAG: <<Phi:i\d+>> Phi [<<Const0>>,<<Const1>>] |
| /// CHECK-DAG: Return [<<Phi>>] |
| |
| /// CHECK-START: boolean Main.BooleanNot(boolean) select_generator (before) |
| /// CHECK: Goto |
| /// CHECK: Goto |
| /// CHECK: Goto |
| /// CHECK-NOT: Goto |
| |
| /// CHECK-START: boolean Main.BooleanNot(boolean) select_generator (after) |
| /// CHECK-DAG: <<Param:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<NotParam:i\d+>> Select [<<Const1>>,<<Const0>>,<<Param>>] |
| /// CHECK-DAG: Return [<<NotParam>>] |
| |
| /// CHECK-START: boolean Main.BooleanNot(boolean) select_generator (after) |
| /// CHECK-NOT: If |
| /// CHECK-NOT: Phi |
| |
| /// CHECK-START: boolean Main.BooleanNot(boolean) select_generator (after) |
| /// CHECK: Goto |
| /// CHECK-NOT: Goto |
| |
| public static boolean BooleanNot(boolean x) { |
| return !x; |
| } |
| |
| /* |
| * Program which only delegates the condition, i.e. returns 1 when True |
| * and 0 when False. |
| */ |
| |
| /// CHECK-START: boolean Main.GreaterThan(int, int) select_generator (before) |
| /// CHECK-DAG: <<ParamX:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Cond:z\d+>> GreaterThan [<<ParamX>>,<<ParamY>>] |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: <<Phi:i\d+>> Phi [<<Const0>>,<<Const1>>] |
| /// CHECK-DAG: Return [<<Phi>>] |
| |
| /// CHECK-START: boolean Main.GreaterThan(int, int) select_generator (after) |
| /// CHECK-DAG: <<ParamX:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Cond:z\d+>> GreaterThan [<<ParamX>>,<<ParamY>>] |
| /// CHECK-DAG: <<Select:i\d+>> Select [<<Const0>>,<<Const1>>,<<Cond>>] |
| /// CHECK-DAG: Return [<<Select>>] |
| |
| public static boolean GreaterThan(int x, int y) { |
| return (x <= y) ? false : true; |
| } |
| |
| /* |
| * Program which negates a condition, i.e. returns 0 when True |
| * and 1 when False. |
| */ |
| |
| /// CHECK-START: boolean Main.LessThan(int, int) select_generator (before) |
| /// CHECK-DAG: <<ParamX:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Cond:z\d+>> GreaterThanOrEqual [<<ParamX>>,<<ParamY>>] |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: <<Phi:i\d+>> Phi [<<Const1>>,<<Const0>>] |
| /// CHECK-DAG: Return [<<Phi>>] |
| |
| /// CHECK-START: boolean Main.LessThan(int, int) select_generator (after) |
| /// CHECK-DAG: <<ParamX:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Cond:z\d+>> GreaterThanOrEqual [<<ParamX>>,<<ParamY>>] |
| /// CHECK-DAG: <<Select:i\d+>> Select [<<Const1>>,<<Const0>>,<<Cond>>] |
| /// CHECK-DAG: Return [<<Select>>] |
| |
| public static boolean LessThan(int x, int y) { |
| return (x < y) ? true : false; |
| } |
| |
| /* |
| * Program which further uses negated conditions. |
| * Note that Phis are discovered retrospectively. |
| */ |
| |
| /// CHECK-START: boolean Main.ValuesOrdered(int, int, int) select_generator (before) |
| /// CHECK-DAG: <<ParamX:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamZ:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<CondXY:z\d+>> GreaterThan [<<ParamX>>,<<ParamY>>] |
| /// CHECK-DAG: If [<<CondXY>>] |
| /// CHECK-DAG: <<CondYZ:z\d+>> GreaterThan [<<ParamY>>,<<ParamZ>>] |
| /// CHECK-DAG: If [<<CondYZ>>] |
| /// CHECK-DAG: <<CondXYZ:z\d+>> NotEqual [<<PhiXY:i\d+>>,<<PhiYZ:i\d+>>] |
| /// CHECK-DAG: If [<<CondXYZ>>] |
| /// CHECK-DAG: Return [<<PhiXYZ:i\d+>>] |
| /// CHECK-DAG: <<PhiXY>> Phi [<<Const1>>,<<Const0>>] |
| /// CHECK-DAG: <<PhiYZ>> Phi [<<Const1>>,<<Const0>>] |
| /// CHECK-DAG: <<PhiXYZ>> Phi [<<Const1>>,<<Const0>>] |
| |
| /// CHECK-START: boolean Main.ValuesOrdered(int, int, int) select_generator (after) |
| /// CHECK-DAG: <<ParamX:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamZ:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<CmpXY:z\d+>> GreaterThan [<<ParamX>>,<<ParamY>>] |
| /// CHECK-DAG: <<SelXY:i\d+>> Select [<<Const1>>,<<Const0>>,<<CmpXY>>] |
| /// CHECK-DAG: <<CmpYZ:z\d+>> GreaterThan [<<ParamY>>,<<ParamZ>>] |
| /// CHECK-DAG: <<SelYZ:i\d+>> Select [<<Const1>>,<<Const0>>,<<CmpYZ>>] |
| /// CHECK-DAG: <<CmpXYZ:z\d+>> NotEqual [<<SelXY>>,<<SelYZ>>] |
| /// CHECK-DAG: <<SelXYZ:i\d+>> Select [<<Const1>>,<<Const0>>,<<CmpXYZ>>] |
| /// CHECK-DAG: Return [<<SelXYZ>>] |
| |
| public static boolean ValuesOrdered(int x, int y, int z) { |
| return (x <= y) == (y <= z); |
| } |
| |
| /// CHECK-START: int Main.NegatedCondition(boolean) select_generator (before) |
| /// CHECK-DAG: <<Param:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: If [<<Param>>] |
| /// CHECK-DAG: <<Phi:i\d+>> Phi [<<Const42>>,<<Const43>>] |
| /// CHECK-DAG: Return [<<Phi>>] |
| |
| /// CHECK-START: int Main.NegatedCondition(boolean) select_generator (after) |
| /// CHECK-DAG: <<Param:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: <<Select:i\d+>> Select [<<Const43>>,<<Const42>>,<<Param>>] |
| /// CHECK-DAG: Return [<<Select>>] |
| |
| /// CHECK-START: int Main.NegatedCondition(boolean) select_generator (after) |
| /// CHECK-NOT: BooleanNot |
| |
| public static int NegatedCondition(boolean x) { |
| return (x != false) ? 42 : 43; |
| } |
| |
| /// CHECK-START: int Main.SimpleTrueBlock(boolean, int) select_generator (after) |
| /// CHECK-DAG: <<ParamX:z\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: <<Add:i\d+>> Add [<<ParamY>>,<<Const42>>] |
| /// CHECK-DAG: <<Select:i\d+>> Select [<<Const43>>,<<Add>>,<<ParamX>>] |
| /// CHECK-DAG: Return [<<Select>>] |
| |
| /// CHECK-START: int Main.SimpleTrueBlock(boolean, int) select_generator (after) |
| /// CHECK-NOT: If |
| |
| public static int SimpleTrueBlock(boolean x, int y) { |
| return x ? y + 42 : 43; |
| } |
| |
| /// CHECK-START: int Main.SimpleFalseBlock(boolean, int) select_generator (after) |
| /// CHECK-DAG: <<ParamX:z\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: <<Add:i\d+>> Add [<<ParamY>>,<<Const43>>] |
| /// CHECK-DAG: <<Select:i\d+>> Select [<<Add>>,<<Const42>>,<<ParamX>>] |
| /// CHECK-DAG: Return [<<Select>>] |
| |
| /// CHECK-START: int Main.SimpleFalseBlock(boolean, int) select_generator (after) |
| /// CHECK-NOT: If |
| |
| public static int SimpleFalseBlock(boolean x, int y) { |
| return x ? 42 : y + 43; |
| } |
| |
| /// CHECK-START: int Main.SimpleBothBlocks(boolean, int, int) select_generator (after) |
| /// CHECK-DAG: <<ParamX:z\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:i\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamZ:i\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: <<AddTrue:i\d+>> Add [<<ParamY>>,<<Const42>>] |
| /// CHECK-DAG: <<AddFalse:i\d+>> Add [<<ParamZ>>,<<Const43>>] |
| /// CHECK-DAG: <<Select:i\d+>> Select [<<AddFalse>>,<<AddTrue>>,<<ParamX>>] |
| /// CHECK-DAG: Return [<<Select>>] |
| |
| /// CHECK-START: int Main.SimpleBothBlocks(boolean, int, int) select_generator (after) |
| /// CHECK-NOT: If |
| |
| public static int SimpleBothBlocks(boolean x, int y, int z) { |
| return x ? y + 42 : z + 43; |
| } |
| |
| /// CHECK-START: int Main.ThreeBlocks(boolean, boolean) select_generator (after) |
| /// CHECK-DAG: <<ParamX:z\d+>> ParameterValue |
| /// CHECK-DAG: <<ParamY:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Const2:i\d+>> IntConstant 2 |
| /// CHECK-DAG: <<Const3:i\d+>> IntConstant 3 |
| /// CHECK-DAG: <<Select23:i\d+>> Select [<<Const3>>,<<Const2>>,<<ParamY>>] |
| /// CHECK-DAG: <<Select123:i\d+>> Select [<<Select23>>,<<Const1>>,<<ParamX>>] |
| /// CHECK-DAG: Return [<<Select123>>] |
| |
| public static int ThreeBlocks(boolean x, boolean y) { |
| return x ? 1 : (y ? 2 : 3); |
| } |
| |
| /// CHECK-START: int Main.MultiplePhis() select_generator (before) |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Const13:i\d+>> IntConstant 13 |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<PhiX:i\d+>> Phi [<<Const0>>,<<Const13>>,<<Const42>>] |
| /// CHECK-DAG: <<PhiY:i\d+>> Phi [<<Const1>>,<<Add:i\d+>>,<<Add>>] |
| /// CHECK-DAG: <<Add>> Add [<<PhiY>>,<<Const1>>] |
| /// CHECK-DAG: <<Cond:z\d+>> LessThanOrEqual [<<Add>>,<<Const1>>] |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: Return [<<PhiX>>] |
| |
| /// CHECK-START: int Main.MultiplePhis() select_generator (after) |
| /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0 |
| /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1 |
| /// CHECK-DAG: <<Const13:i\d+>> IntConstant 13 |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<PhiX:i\d+>> Phi [<<Const0>>,<<Select:i\d+>>] |
| /// CHECK-DAG: <<PhiY:i\d+>> Phi [<<Const1>>,<<Add:i\d+>>] |
| /// CHECK-DAG: <<Add>> Add [<<PhiY>>,<<Const1>>] |
| /// CHECK-DAG: <<Cond:z\d+>> LessThanOrEqual [<<Add>>,<<Const1>>] |
| /// CHECK-DAG: <<Select>> Select [<<Const13>>,<<Const42>>,<<Cond>>] |
| /// CHECK-DAG: Return [<<PhiX>>] |
| |
| public static int MultiplePhis() { |
| int x = 0; |
| int y = 1; |
| while (y++ < 10) { |
| if (y > 1) { |
| x = 13; |
| continue; |
| } else { |
| x = 42; |
| continue; |
| } |
| } |
| return x; |
| } |
| |
| /// CHECK-START: int Main.TrueBlockWithTooManyInstructions(boolean) select_generator (before) |
| /// CHECK-DAG: <<This:l\d+>> ParameterValue |
| /// CHECK-DAG: <<Cond:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const2:i\d+>> IntConstant 2 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: <<Iget:i\d+>> InstanceFieldGet [<<This>>] |
| /// CHECK-DAG: <<Add:i\d+>> Add [<<Iget>>,<<Const2>>] |
| /// CHECK-DAG: Phi [<<Add>>,<<Const43>>] |
| |
| /// CHECK-START: int Main.TrueBlockWithTooManyInstructions(boolean) select_generator (after) |
| /// CHECK-NOT: Select |
| |
| public int TrueBlockWithTooManyInstructions(boolean x) { |
| return x ? (read_field + 2) : 43; |
| } |
| |
| /// CHECK-START: int Main.FalseBlockWithTooManyInstructions(boolean) select_generator (before) |
| /// CHECK-DAG: <<This:l\d+>> ParameterValue |
| /// CHECK-DAG: <<Cond:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const3:i\d+>> IntConstant 3 |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: <<Iget:i\d+>> InstanceFieldGet [<<This>>] |
| /// CHECK-DAG: <<Add:i\d+>> Add [<<Iget>>,<<Const3>>] |
| /// CHECK-DAG: Phi [<<Const42>>,<<Add>>] |
| |
| /// CHECK-START: int Main.FalseBlockWithTooManyInstructions(boolean) select_generator (after) |
| /// CHECK-NOT: Select |
| |
| public int FalseBlockWithTooManyInstructions(boolean x) { |
| return x ? 42 : (read_field + 3); |
| } |
| |
| /// CHECK-START: int Main.TrueBlockWithSideEffects(boolean) select_generator (before) |
| /// CHECK-DAG: <<This:l\d+>> ParameterValue |
| /// CHECK-DAG: <<Cond:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: InstanceFieldSet [<<This>>,<<Const42>>] |
| /// CHECK-DAG: Phi [<<Const42>>,<<Const43>>] |
| |
| /// CHECK-START: int Main.TrueBlockWithSideEffects(boolean) select_generator (after) |
| /// CHECK-NOT: Select |
| |
| public int TrueBlockWithSideEffects(boolean x) { |
| return x ? (write_field = 42) : 43; |
| } |
| |
| /// CHECK-START: int Main.FalseBlockWithSideEffects(boolean) select_generator (before) |
| /// CHECK-DAG: <<This:l\d+>> ParameterValue |
| /// CHECK-DAG: <<Cond:z\d+>> ParameterValue |
| /// CHECK-DAG: <<Const42:i\d+>> IntConstant 42 |
| /// CHECK-DAG: <<Const43:i\d+>> IntConstant 43 |
| /// CHECK-DAG: If [<<Cond>>] |
| /// CHECK-DAG: InstanceFieldSet [<<This>>,<<Const43>>] |
| /// CHECK-DAG: Phi [<<Const42>>,<<Const43>>] |
| |
| /// CHECK-START: int Main.FalseBlockWithSideEffects(boolean) select_generator (after) |
| /// CHECK-NOT: Select |
| |
| public int FalseBlockWithSideEffects(boolean x) { |
| return x ? 42 : (write_field = 43); |
| } |
| |
| public static void main(String[] args) { |
| assertBoolEquals(false, BooleanNot(true)); |
| assertBoolEquals(true, BooleanNot(false)); |
| assertBoolEquals(true, GreaterThan(10, 5)); |
| assertBoolEquals(false, GreaterThan(10, 10)); |
| assertBoolEquals(false, GreaterThan(5, 10)); |
| assertBoolEquals(true, LessThan(5, 10)); |
| assertBoolEquals(false, LessThan(10, 10)); |
| assertBoolEquals(false, LessThan(10, 5)); |
| assertBoolEquals(true, ValuesOrdered(1, 3, 5)); |
| assertBoolEquals(true, ValuesOrdered(5, 3, 1)); |
| assertBoolEquals(false, ValuesOrdered(1, 3, 2)); |
| assertBoolEquals(false, ValuesOrdered(2, 3, 1)); |
| assertBoolEquals(true, ValuesOrdered(3, 3, 3)); |
| assertBoolEquals(true, ValuesOrdered(3, 3, 5)); |
| assertBoolEquals(false, ValuesOrdered(5, 5, 3)); |
| assertIntEquals(42, NegatedCondition(true)); |
| assertIntEquals(43, NegatedCondition(false)); |
| assertIntEquals(46, SimpleTrueBlock(true, 4)); |
| assertIntEquals(43, SimpleTrueBlock(false, 4)); |
| assertIntEquals(42, SimpleFalseBlock(true, 7)); |
| assertIntEquals(50, SimpleFalseBlock(false, 7)); |
| assertIntEquals(48, SimpleBothBlocks(true, 6, 2)); |
| assertIntEquals(45, SimpleBothBlocks(false, 6, 2)); |
| assertIntEquals(1, ThreeBlocks(true, true)); |
| assertIntEquals(1, ThreeBlocks(true, false)); |
| assertIntEquals(2, ThreeBlocks(false, true)); |
| assertIntEquals(3, ThreeBlocks(false, false)); |
| assertIntEquals(13, MultiplePhis()); |
| |
| Main m = new Main(); |
| assertIntEquals(42, m.TrueBlockWithTooManyInstructions(true)); |
| assertIntEquals(43, m.TrueBlockWithTooManyInstructions(false)); |
| assertIntEquals(42, m.FalseBlockWithTooManyInstructions(true)); |
| assertIntEquals(43, m.FalseBlockWithTooManyInstructions(false)); |
| assertIntEquals(42, m.TrueBlockWithSideEffects(true)); |
| assertIntEquals(43, m.TrueBlockWithSideEffects(false)); |
| assertIntEquals(42, m.FalseBlockWithSideEffects(true)); |
| assertIntEquals(43, m.FalseBlockWithSideEffects(false)); |
| } |
| |
| // These need to be instance fields so as to not generate a LoadClass for iget/iput. |
| public int read_field = 40; |
| public int write_field = 42; |
| } |
