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