/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.lang.reflect.Method;
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public class Main {
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// Note #1: `javac` flips the conditions of If statements.
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// Note #2: In the optimizing compiler, the first input of Phi is always
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// the fall-through path, i.e. the false branch.
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public static void assertBoolEquals(boolean expected, boolean result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertIntEquals(int expected, int result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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/*
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* Program which only delegates the condition, i.e. returns 1 when True
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* and 0 when False.
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*/
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/// CHECK-START: boolean Main.GreaterThan(int, int) select_generator (before)
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/// CHECK-DAG: <<ParamX:i\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
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/// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
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/// CHECK-DAG: <<Cond:z\d+>> GreaterThan [<<ParamX>>,<<ParamY>>]
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/// CHECK-DAG: If [<<Cond>>]
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/// CHECK-DAG: <<Phi:i\d+>> Phi [<<Const0>>,<<Const1>>]
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/// CHECK-DAG: Return [<<Phi>>]
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/// CHECK-START: boolean Main.GreaterThan(int, int) select_generator (after)
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/// CHECK-DAG: <<ParamX:i\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
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/// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
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/// CHECK-DAG: <<Cond:z\d+>> GreaterThan [<<ParamX>>,<<ParamY>>]
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/// CHECK-DAG: <<Select:i\d+>> Select [<<Const0>>,<<Const1>>,<<Cond>>]
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/// CHECK-DAG: Return [<<Select>>]
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public static boolean GreaterThan(int x, int y) {
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return (x <= y) ? false : true;
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}
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/*
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* Program which negates a condition, i.e. returns 0 when True
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* and 1 when False.
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*/
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/// CHECK-START: boolean Main.LessThan(int, int) select_generator (before)
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/// CHECK-DAG: <<ParamX:i\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
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/// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
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/// CHECK-DAG: <<Cond:z\d+>> GreaterThanOrEqual [<<ParamX>>,<<ParamY>>]
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/// CHECK-DAG: If [<<Cond>>]
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/// CHECK-DAG: <<Phi:i\d+>> Phi [<<Const1>>,<<Const0>>]
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/// CHECK-DAG: Return [<<Phi>>]
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/// CHECK-START: boolean Main.LessThan(int, int) select_generator (after)
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/// CHECK-DAG: <<ParamX:i\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
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/// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
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/// CHECK-DAG: <<Cond:z\d+>> GreaterThanOrEqual [<<ParamX>>,<<ParamY>>]
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/// CHECK-DAG: <<Select:i\d+>> Select [<<Const1>>,<<Const0>>,<<Cond>>]
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/// CHECK-DAG: Return [<<Select>>]
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public static boolean LessThan(int x, int y) {
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return (x < y) ? true : false;
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}
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/// CHECK-START: int Main.SimpleTrueBlock(boolean, int) select_generator (after)
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/// CHECK-DAG: <<ParamX:z\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const42:i\d+>> IntConstant 42
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/// CHECK-DAG: <<Const43:i\d+>> IntConstant 43
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/// CHECK-DAG: <<Add:i\d+>> Add [<<ParamY>>,<<Const42>>]
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/// CHECK-DAG: <<Select:i\d+>> Select [<<Const43>>,<<Add>>,<<ParamX>>]
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/// CHECK-DAG: Return [<<Select>>]
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/// CHECK-START: int Main.SimpleTrueBlock(boolean, int) select_generator (after)
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/// CHECK-NOT: If
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public static int SimpleTrueBlock(boolean x, int y) {
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return x ? y + 42 : 43;
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}
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/// CHECK-START: int Main.SimpleFalseBlock(boolean, int) select_generator (after)
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/// CHECK-DAG: <<ParamX:z\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const42:i\d+>> IntConstant 42
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/// CHECK-DAG: <<Const43:i\d+>> IntConstant 43
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/// CHECK-DAG: <<Add:i\d+>> Add [<<ParamY>>,<<Const43>>]
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/// CHECK-DAG: <<Select:i\d+>> Select [<<Add>>,<<Const42>>,<<ParamX>>]
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/// CHECK-DAG: Return [<<Select>>]
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/// CHECK-START: int Main.SimpleFalseBlock(boolean, int) select_generator (after)
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/// CHECK-NOT: If
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public static int SimpleFalseBlock(boolean x, int y) {
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return x ? 42 : y + 43;
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}
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/// CHECK-START: int Main.SimpleBothBlocks(boolean, int, int) select_generator (after)
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/// CHECK-DAG: <<ParamX:z\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:i\d+>> ParameterValue
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/// CHECK-DAG: <<ParamZ:i\d+>> ParameterValue
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/// CHECK-DAG: <<Const42:i\d+>> IntConstant 42
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/// CHECK-DAG: <<Const43:i\d+>> IntConstant 43
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/// CHECK-DAG: <<AddTrue:i\d+>> Add [<<ParamY>>,<<Const42>>]
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/// CHECK-DAG: <<AddFalse:i\d+>> Add [<<ParamZ>>,<<Const43>>]
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/// CHECK-DAG: <<Select:i\d+>> Select [<<AddFalse>>,<<AddTrue>>,<<ParamX>>]
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/// CHECK-DAG: Return [<<Select>>]
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/// CHECK-START: int Main.SimpleBothBlocks(boolean, int, int) select_generator (after)
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/// CHECK-NOT: If
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public static int SimpleBothBlocks(boolean x, int y, int z) {
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return x ? y + 42 : z + 43;
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}
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/// CHECK-START: int Main.ThreeBlocks(boolean, boolean) select_generator (after)
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/// CHECK-DAG: <<ParamX:z\d+>> ParameterValue
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/// CHECK-DAG: <<ParamY:z\d+>> ParameterValue
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/// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
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/// CHECK-DAG: <<Const2:i\d+>> IntConstant 2
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/// CHECK-DAG: <<Const3:i\d+>> IntConstant 3
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/// CHECK-DAG: <<Select23:i\d+>> Select [<<Const3>>,<<Const2>>,<<ParamY>>]
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/// CHECK-DAG: <<Select123:i\d+>> Select [<<Select23>>,<<Const1>>,<<ParamX>>]
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/// CHECK-DAG: Return [<<Select123>>]
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public static int ThreeBlocks(boolean x, boolean y) {
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if (x) {
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return 1;
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} else if (y) {
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return 2;
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} else {
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return 3;
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}
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}
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/// CHECK-START: int Main.TrueBlockWithTooManyInstructions(boolean) select_generator (before)
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/// CHECK-DAG: <<This:l\d+>> ParameterValue
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/// CHECK-DAG: <<Cond:z\d+>> ParameterValue
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/// CHECK-DAG: <<Const2:i\d+>> IntConstant 2
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/// CHECK-DAG: <<Const43:i\d+>> IntConstant 43
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/// CHECK-DAG: If [<<Cond>>]
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/// CHECK-DAG: <<Iget:i\d+>> InstanceFieldGet [<<This>>]
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/// CHECK-DAG: <<Add:i\d+>> Add [<<Iget>>,<<Const2>>]
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/// CHECK-DAG: Phi [<<Add>>,<<Const43>>]
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/// CHECK-START: int Main.TrueBlockWithTooManyInstructions(boolean) select_generator (after)
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/// CHECK-NOT: Select
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public int TrueBlockWithTooManyInstructions(boolean x) {
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return x ? (read_field + 2) : 43;
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}
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/// CHECK-START: int Main.FalseBlockWithTooManyInstructions(boolean) select_generator (before)
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/// CHECK-DAG: <<This:l\d+>> ParameterValue
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/// CHECK-DAG: <<Cond:z\d+>> ParameterValue
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/// CHECK-DAG: <<Const3:i\d+>> IntConstant 3
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/// CHECK-DAG: <<Const42:i\d+>> IntConstant 42
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/// CHECK-DAG: If [<<Cond>>]
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/// CHECK-DAG: <<Iget:i\d+>> InstanceFieldGet [<<This>>]
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/// CHECK-DAG: <<Add:i\d+>> Add [<<Iget>>,<<Const3>>]
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/// CHECK-DAG: Phi [<<Const42>>,<<Add>>]
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/// CHECK-START: int Main.FalseBlockWithTooManyInstructions(boolean) select_generator (after)
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/// CHECK-NOT: Select
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public int FalseBlockWithTooManyInstructions(boolean x) {
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return x ? 42 : (read_field + 3);
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}
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/// CHECK-START: int Main.TrueBlockWithSideEffects(boolean) select_generator (before)
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/// CHECK-DAG: <<This:l\d+>> ParameterValue
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/// CHECK-DAG: <<Cond:z\d+>> ParameterValue
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/// CHECK-DAG: <<Const42:i\d+>> IntConstant 42
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/// CHECK-DAG: <<Const43:i\d+>> IntConstant 43
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/// CHECK-DAG: If [<<Cond>>]
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/// CHECK-DAG: InstanceFieldSet [<<This>>,<<Const42>>]
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/// CHECK-DAG: Phi [<<Const42>>,<<Const43>>]
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/// CHECK-START: int Main.TrueBlockWithSideEffects(boolean) select_generator (after)
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/// CHECK-NOT: Select
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public int TrueBlockWithSideEffects(boolean x) {
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return x ? (write_field = 42) : 43;
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}
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/// CHECK-START: int Main.FalseBlockWithSideEffects(boolean) select_generator (before)
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/// CHECK-DAG: <<This:l\d+>> ParameterValue
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/// CHECK-DAG: <<Cond:z\d+>> ParameterValue
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/// CHECK-DAG: <<Const42:i\d+>> IntConstant 42
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/// CHECK-DAG: <<Const43:i\d+>> IntConstant 43
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/// CHECK-DAG: If [<<Cond>>]
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/// CHECK-DAG: InstanceFieldSet [<<This>>,<<Const43>>]
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/// CHECK-DAG: Phi [<<Const42>>,<<Const43>>]
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/// CHECK-START: int Main.FalseBlockWithSideEffects(boolean) select_generator (after)
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/// CHECK-NOT: Select
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public int FalseBlockWithSideEffects(boolean x) {
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return x ? 42 : (write_field = 43);
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}
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public static void main(String[] args) throws Exception {
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Class main2 = Class.forName("Main2");
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Method booleanNot = main2.getMethod("BooleanNot", boolean.class);
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Method valuesOrdered = main2.getMethod("ValuesOrdered", int.class, int.class, int.class);
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Method negatedCondition = main2.getMethod("NegatedCondition", boolean.class);
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Method multiplePhis = main2.getMethod("MultiplePhis");
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assertBoolEquals(false, (boolean)booleanNot.invoke(null, true));
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assertBoolEquals(true, (boolean)booleanNot.invoke(null, false));
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assertBoolEquals(true, GreaterThan(10, 5));
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assertBoolEquals(false, GreaterThan(10, 10));
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assertBoolEquals(false, GreaterThan(5, 10));
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assertBoolEquals(true, LessThan(5, 10));
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assertBoolEquals(false, LessThan(10, 10));
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assertBoolEquals(false, LessThan(10, 5));
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assertBoolEquals(true, (boolean)valuesOrdered.invoke(null, 1, 3, 5));
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assertBoolEquals(true, (boolean)valuesOrdered.invoke(null, 5, 3, 1));
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assertBoolEquals(false, (boolean)valuesOrdered.invoke(null, 1, 3, 2));
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assertBoolEquals(false, (boolean)valuesOrdered.invoke(null, 2, 3, 1));
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assertBoolEquals(true, (boolean)valuesOrdered.invoke(null, 3, 3, 3));
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assertBoolEquals(true, (boolean)valuesOrdered.invoke(null, 3, 3, 5));
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assertBoolEquals(false, (boolean)valuesOrdered.invoke(null, 5, 5, 3));
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assertIntEquals(42, (int)negatedCondition.invoke(null, true));
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assertIntEquals(43, (int)negatedCondition.invoke(null, false));
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assertIntEquals(46, SimpleTrueBlock(true, 4));
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assertIntEquals(43, SimpleTrueBlock(false, 4));
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assertIntEquals(42, SimpleFalseBlock(true, 7));
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assertIntEquals(50, SimpleFalseBlock(false, 7));
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assertIntEquals(48, SimpleBothBlocks(true, 6, 2));
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assertIntEquals(45, SimpleBothBlocks(false, 6, 2));
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assertIntEquals(1, ThreeBlocks(true, true));
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assertIntEquals(1, ThreeBlocks(true, false));
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assertIntEquals(2, ThreeBlocks(false, true));
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assertIntEquals(3, ThreeBlocks(false, false));
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assertIntEquals(13, (int)multiplePhis.invoke(null));
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Main m = new Main();
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assertIntEquals(42, m.TrueBlockWithTooManyInstructions(true));
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assertIntEquals(43, m.TrueBlockWithTooManyInstructions(false));
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assertIntEquals(42, m.FalseBlockWithTooManyInstructions(true));
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assertIntEquals(43, m.FalseBlockWithTooManyInstructions(false));
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assertIntEquals(42, m.TrueBlockWithSideEffects(true));
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assertIntEquals(43, m.TrueBlockWithSideEffects(false));
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assertIntEquals(42, m.FalseBlockWithSideEffects(true));
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assertIntEquals(43, m.FalseBlockWithSideEffects(false));
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}
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// These need to be instance fields so as to not generate a LoadClass for iget/iput.
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public int read_field = 40;
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public int write_field = 42;
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}
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