001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.codegen.intrinsics;
018
019import com.intellij.psi.PsiElement;
020import org.jetbrains.annotations.NotNull;
021import org.jetbrains.asm4.Type;
022import org.jetbrains.asm4.commons.InstructionAdapter;
023import org.jetbrains.jet.codegen.ExpressionCodegen;
024import org.jetbrains.jet.codegen.StackValue;
025import org.jetbrains.jet.codegen.state.GenerationState;
026import org.jetbrains.jet.lang.psi.JetExpression;
027import org.jetbrains.jet.lang.psi.JetParenthesizedExpression;
028import org.jetbrains.jet.lang.psi.JetReferenceExpression;
029
030import java.util.List;
031
032import static org.jetbrains.jet.codegen.AsmUtil.genIncrement;
033import static org.jetbrains.jet.codegen.AsmUtil.unboxType;
034
035public class Increment implements IntrinsicMethod {
036    private final int myDelta;
037
038    public Increment(int delta) {
039        myDelta = delta;
040    }
041
042    @Override
043    public StackValue generate(
044            ExpressionCodegen codegen,
045            InstructionAdapter v,
046            @NotNull Type expectedType,
047            PsiElement element,
048            List<JetExpression> arguments,
049            StackValue receiver,
050            @NotNull GenerationState state
051    ) {
052        boolean nullable = expectedType.getSort() == Type.OBJECT;
053        if (nullable) {
054            expectedType = unboxType(expectedType);
055        }
056        if (arguments.size() > 0) {
057            JetExpression operand = arguments.get(0);
058            while (operand instanceof JetParenthesizedExpression) {
059                operand = ((JetParenthesizedExpression) operand).getExpression();
060            }
061            if (operand instanceof JetReferenceExpression && expectedType == Type.INT_TYPE) {
062                int index = codegen.indexOfLocal((JetReferenceExpression) operand);
063                if (index >= 0) {
064                    return StackValue.preIncrement(index, myDelta);
065                }
066            }
067            StackValue value = codegen.genQualified(receiver, operand);
068            value.dupReceiver(v);
069            value.dupReceiver(v);
070
071            value.put(expectedType, v);
072            genIncrement(expectedType, myDelta, v);
073            value.store(expectedType, v);
074            value.put(expectedType, v);
075        }
076        else {
077            receiver.put(expectedType, v);
078            genIncrement(expectedType, myDelta, v);
079        }
080        return StackValue.onStack(expectedType);
081    }
082}