/*

 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package jdk.jfr.internal.instrument;

import jdk.internal.org.objectweb.asm.Label;

import jdk.internal.org.objectweb.asm.Opcodes;

import jdk.internal.org.objectweb.asm.Type;

import jdk.internal.org.objectweb.asm.commons.LocalVariablesSorter;

import jdk.internal.org.objectweb.asm.commons.Remapper;

import jdk.internal.org.objectweb.asm.commons.RemappingMethodAdapter;

@Deprecated

final class JIMethodInliningAdapter extends RemappingMethodAdapter {

    private final LocalVariablesSorter lvs;

    private final Label end;

    public JIMethodInliningAdapter(LocalVariablesSorter mv, Label end, int acc, String desc, Remapper remapper) {

        super(acc, desc, mv, remapper);

        this.lvs = mv;

        this.end = end;

        int offset = isStatic(acc) ? 0 : 1;

        Type[] args = Type.getArgumentTypes(desc);

        for (int i = args.length - 1; i >= 0; i--) {

            super.visitVarInsn(args[i].getOpcode(Opcodes.ISTORE), i + offset);

        }

        if (offset > 0) {

            super.visitVarInsn(Opcodes.ASTORE, 0);

        }

    }

    private boolean isStatic(int acc) {

        return (acc & Opcodes.ACC_STATIC) != 0;

    }

    @Override

    public void visitInsn(int opcode) {

        if (opcode == Opcodes.RETURN || opcode == Opcodes.IRETURN

                || opcode == Opcodes.ARETURN || opcode == Opcodes.LRETURN) {

            super.visitJumpInsn(Opcodes.GOTO, end);

        } else {

            super.visitInsn(opcode);

        }

    }

    @Override

    public void visitMaxs(int stack, int locals) {

    }

    @Override

    protected int newLocalMapping(Type type) {

        return lvs.newLocal(type);

    }

}