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.annotations.Nullable;
022    import org.jetbrains.asm4.Opcodes;
023    import org.jetbrains.asm4.Type;
024    import org.jetbrains.asm4.commons.InstructionAdapter;
025    import org.jetbrains.jet.codegen.ExpressionCodegen;
026    import org.jetbrains.jet.codegen.StackValue;
027    import org.jetbrains.jet.lang.psi.JetExpression;
028    import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
029    
030    import java.util.List;
031    
032    public class HashCode extends IntrinsicMethod {
033        @NotNull
034        @Override
035        public Type generateImpl(
036                @NotNull ExpressionCodegen codegen,
037                @NotNull InstructionAdapter v,
038                @NotNull Type returnType,
039                @Nullable PsiElement element,
040                @Nullable List<JetExpression> arguments,
041                StackValue receiver
042        ) {
043            receiver.put(AsmTypeConstants.OBJECT_TYPE, v);
044            v.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "hashCode", "()I");
045            return Type.INT_TYPE;
046        }
047    }