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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
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package com.oracle.truffle.llvm.nodes.intrinsics.interop;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.nodes.intrinsics.llvm.LLVMIntrinsic;
import com.oracle.truffle.llvm.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.LLVMContext;
import com.oracle.truffle.llvm.runtime.LLVMFunctionDescriptor;
import com.oracle.truffle.llvm.runtime.LLVMFunctionHandle;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

@SuppressWarnings("unused")
@NodeChild(type = LLVMExpressionNode.class)
public abstract class LLVMTruffleAddressToFunction extends LLVMIntrinsic {

    @Specialization(guards = "value.getVal() == cachedValue.getVal()")
    public Object executeIntrinsicCached(LLVMAddress value, @Cached("value") LLVMAddress cachedValue, @Cached("getContext()") LLVMContext cachedContext,
                    @Cached("getDescriptor(cachedValue, cachedContext)") LLVMFunctionDescriptor handle) {
        return handle;
    }

    @Specialization(replaces = "executeIntrinsicCached")
    public Object executeIntrinsic(LLVMAddress value, @Cached("getContext()") LLVMContext cachedContext) {
        return getDescriptor(value, cachedContext);
    }

    protected static LLVMFunctionDescriptor getDescriptor(LLVMAddress value, LLVMContext cachedContext) {
        return cachedContext.lookup(LLVMFunctionHandle.createHandle(value.getVal()));
    }

}