| /* |
| * Copyright (C) 2011 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. |
| */ |
| |
| package com.google.dexmaker; |
| |
| import com.android.dx.rop.code.RegisterSpec; |
| |
| /** |
| * A temporary variable that holds a single value of a known type. |
| */ |
| public final class Local<T> { |
| private final Code code; |
| final TypeId<T> type; |
| private int reg = -1; |
| private RegisterSpec spec; |
| |
| private Local(Code code, TypeId<T> type) { |
| this.code = code; |
| this.type = type; |
| } |
| |
| static <T> Local<T> get(Code code, TypeId<T> type) { |
| return new Local<T>(code, type); |
| } |
| |
| /** |
| * Assigns registers to this local. |
| * |
| * @return the number of registers required. |
| */ |
| int initialize(int nextAvailableRegister) { |
| this.reg = nextAvailableRegister; |
| this.spec = RegisterSpec.make(nextAvailableRegister, type.ropType); |
| return size(); |
| } |
| |
| /** |
| * Returns the number of registered required to hold this local. |
| */ |
| int size() { |
| return type.ropType.getCategory(); |
| } |
| |
| RegisterSpec spec() { |
| if (spec == null) { |
| code.initializeLocals(); |
| if (spec == null) { |
| throw new AssertionError(); |
| } |
| } |
| return spec; |
| } |
| |
| public TypeId getType() { |
| return type; |
| } |
| |
| @Override public String toString() { |
| return "v" + reg + "(" + type + ")"; |
| } |
| } |