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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.nodes.intrinsics.llvm;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeChildren;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.global.LLVMGlobalVariable;
import com.oracle.truffle.llvm.runtime.memory.LLVMNativeFunctions.MemCopyNode;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

public abstract class LLVMMemMove {

    @NodeChildren({@NodeChild(type = LLVMExpressionNode.class, value = "dest"), @NodeChild(type = LLVMExpressionNode.class, value = "src"),
                    @NodeChild(type = LLVMExpressionNode.class, value = "length"),
                    @NodeChild(type = LLVMExpressionNode.class, value = "align"), @NodeChild(type = LLVMExpressionNode.class, value = "isVolatile")})
    public abstract static class LLVMMemMoveI64 extends LLVMBuiltin {

        @Child private MemCopyNode memMove;

        private MemCopyNode getMemMove() {
            if (memMove == null) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                memMove = insert(getContext().getNativeFunctions().createMemCopyNode());
            }
            return memMove;
        }

        @SuppressWarnings("unused")
        @Specialization
        public Object executeVoid(LLVMAddress dest, LLVMAddress source, long length, int align, boolean isVolatile) {
            getMemMove().execute(dest, source, length);
            return null;
        }

        @SuppressWarnings("unused")
        @Specialization
        public Object executeVoid(LLVMGlobalVariable dest, LLVMAddress source, long length, int align, boolean isVolatile) {
            getMemMove().execute(dest.getNativeLocation(), source, length);
            return null;
        }

        @SuppressWarnings("unused")
        @Specialization
        public Object executeVoid(LLVMAddress dest, LLVMGlobalVariable source, long length, int align, boolean isVolatile) {
            getMemMove().execute(dest, source.getNativeLocation(), length);
            return null;
        }

        @SuppressWarnings("unused")
        @Specialization
        public Object executeVoid(LLVMGlobalVariable dest, LLVMGlobalVariable source, long length, int align, boolean isVolatile) {
            getMemMove().execute(dest.getNativeLocation(), source.getNativeLocation(), length);
            return null;
        }

    }

}