| // Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.utils; |
| |
| import com.android.tools.r8.androidapi.AndroidApiLevelCompute; |
| import com.android.tools.r8.androidapi.ComputedApiLevel; |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexEncodedMethod; |
| import com.android.tools.r8.graph.DexProgramClass; |
| import com.android.tools.r8.graph.LibraryMethod; |
| import com.android.tools.r8.graph.ProgramMethod; |
| |
| public class AndroidApiLevelUtils { |
| |
| public static boolean isApiSafeForInlining( |
| ProgramMethod caller, ProgramMethod inlinee, InternalOptions options) { |
| if (!options.apiModelingOptions().enableApiCallerIdentification) { |
| return true; |
| } |
| if (caller.getHolderType() == inlinee.getHolderType()) { |
| return true; |
| } |
| // For inlining we only measure if the code has invokes into the library. |
| return caller |
| .getDefinition() |
| .getApiLevelForCode() |
| .isGreaterThanOrEqualTo(inlinee.getDefinition().getApiLevelForCode()); |
| } |
| |
| public static ComputedApiLevel getApiReferenceLevelForMerging( |
| AppView<?> appView, AndroidApiLevelCompute apiLevelCompute, DexProgramClass clazz) { |
| // The api level of a class is the max level of it's members, super class and interfaces. |
| return getMembersApiReferenceLevelForMerging( |
| clazz, |
| apiLevelCompute.computeApiLevelForDefinition( |
| clazz.allImmediateSupertypes(), apiLevelCompute.getPlatformApiLevelOrUnknown(appView))); |
| } |
| |
| private static ComputedApiLevel getMembersApiReferenceLevelForMerging( |
| DexProgramClass clazz, ComputedApiLevel memberLevel) { |
| // Based on b/138781768#comment57 there is almost no penalty for having an unknown reference |
| // as long as we are not invoking or accessing a field on it. Therefore we can disregard static |
| // types of fields and only consider method code api levels. |
| for (DexEncodedMethod method : clazz.methods()) { |
| if (method.hasCode()) { |
| memberLevel = memberLevel.max(method.getApiLevelForCode()); |
| } |
| if (memberLevel.isUnknownApiLevel()) { |
| return memberLevel; |
| } |
| } |
| return memberLevel; |
| } |
| |
| public static boolean isApiSafeForMemberRebinding( |
| LibraryMethod method, |
| AndroidApiLevelCompute androidApiLevelCompute, |
| InternalOptions options) { |
| ComputedApiLevel apiLevel = |
| androidApiLevelCompute.computeApiLevelForLibraryReference( |
| method.getReference(), ComputedApiLevel.unknown()); |
| if (apiLevel.isUnknownApiLevel()) { |
| return false; |
| } |
| assert options.apiModelingOptions().enableApiCallerIdentification; |
| return apiLevel.asKnownApiLevel().getApiLevel().isLessThanOrEqualTo(options.getMinApiLevel()); |
| } |
| } |