1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.dexgen.rop.code; 18 19 /** 20 * Implementation of {@link TranslationAdvice} which conservatively answers 21 * {@code false} to all methods. 22 */ 23 public final class ConservativeTranslationAdvice 24 implements TranslationAdvice { 25 /** {@code non-null;} standard instance of this class */ 26 public static final ConservativeTranslationAdvice THE_ONE = 27 new ConservativeTranslationAdvice(); 28 29 /** 30 * This class is not publicly instantiable. Use {@link #THE_ONE}. 31 */ 32 private ConservativeTranslationAdvice() { 33 // This space intentionally left blank. 34 } 35 36 /** {@inheritDoc} */ 37 public boolean hasConstantOperation(Rop opcode, 38 RegisterSpec sourceA, RegisterSpec sourceB) { 39 return false; 40 } 41 42 /** {@inheritDoc} */ 43 public boolean requiresSourcesInOrder(Rop opcode, 44 RegisterSpecList sources) { 45 return false; 46 } 47 48 /** {@inheritDoc} */ 49 public int getMaxOptimalRegisterCount() { 50 return Integer.MAX_VALUE; 51 } 52 } 53
