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    
017    package org.jetbrains.jet.codegen.intrinsics;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.org.objectweb.asm.Type;
022    import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
023    import org.jetbrains.jet.codegen.ExpressionCodegen;
024    import org.jetbrains.jet.codegen.StackValue;
025    import org.jetbrains.jet.lang.psi.JetExpression;
026    import org.jetbrains.jet.lang.psi.JetParenthesizedExpression;
027    import org.jetbrains.jet.lang.psi.JetReferenceExpression;
028    
029    import java.util.List;
030    
031    import static org.jetbrains.jet.codegen.AsmUtil.genIncrement;
032    import static org.jetbrains.jet.codegen.AsmUtil.isPrimitive;
033    
034    public class Increment extends IntrinsicMethod {
035        private final int myDelta;
036    
037        public Increment(int delta) {
038            myDelta = delta;
039        }
040    
041        @NotNull
042        @Override
043        public Type generateImpl(
044                @NotNull ExpressionCodegen codegen,
045                @NotNull InstructionAdapter v,
046                @NotNull Type returnType,
047                PsiElement element,
048                List<JetExpression> arguments,
049                StackValue receiver
050        ) {
051            assert isPrimitive(returnType) : "Return type of Increment intrinsic should be of primitive type : " + returnType;
052    
053            if (arguments.size() > 0) {
054                JetExpression operand = arguments.get(0);
055                while (operand instanceof JetParenthesizedExpression) {
056                    operand = ((JetParenthesizedExpression) operand).getExpression();
057                }
058                if (operand instanceof JetReferenceExpression && returnType == Type.INT_TYPE) {
059                    int index = codegen.indexOfLocal((JetReferenceExpression) operand);
060                    if (index >= 0) {
061                        StackValue.preIncrement(index, myDelta).put(returnType, v);
062                        return returnType;
063                    }
064                }
065                StackValue value = codegen.genQualified(receiver, operand);
066                value.dupReceiver(v);
067                value.dupReceiver(v);
068    
069                value.put(returnType, v);
070                genIncrement(returnType, myDelta, v);
071                value.store(returnType, v);
072                value.put(returnType, v);
073            }
074            else {
075                receiver.put(returnType, v);
076                genIncrement(returnType, myDelta, v);
077            }
078    
079            return returnType;
080        }
081    }