/*
 * Copyright (c) 2016, Oracle and/or its affiliates.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 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
 * with the distribution.
 *
 * 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
 * permission.
 *
 * 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
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.oracle.truffle.llvm.types;

import com.oracle.truffle.api.CompilerAsserts;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.TruffleObject;

public final class LLVMFunctionDescriptor implements TruffleObject, Comparable<LLVMFunctionDescriptor>, LLVMFunction {

    public enum LLVMRuntimeType {
        I1,
        I8,
        I16,
        I32,
        I64,
        I_VAR_BITWIDTH,
        HALF,
        FLOAT,
        DOUBLE,
        X86_FP80,
        ADDRESS,
        STRUCT,
        ARRAY,
        FUNCTION_ADDRESS,
        I1_VECTOR,
        I8_VECTOR,
        I16_VECTOR,
        I32_VECTOR,
        I64_VECTOR,
        FLOAT_VECTOR,
        DOUBLE_VECTOR,
        VOID,
        ILLEGAL,
        I1_POINTER,
        I8_POINTER,
        I16_POINTER,
        I32_POINTER,
        I64_POINTER,
        HALF_POINTER,
        FLOAT_POINTER,
        DOUBLE_POINTER;
    }

    private final String functionName;
    private final LLVMRuntimeType returnType;
    private final LLVMRuntimeType[] parameterTypes;
    private final boolean hasVarArgs;
    private final int functionId;

    private LLVMFunctionDescriptor(String name, LLVMRuntimeType llvmReturnType, LLVMRuntimeType[] llvmParamTypes, boolean varArgs, int functionId) {
        this.functionName = name;
        this.returnType = llvmReturnType;
        this.parameterTypes = llvmParamTypes;
        this.hasVarArgs = varArgs;
        this.functionId = functionId;
    }

    public static LLVMFunctionDescriptor create(String name, LLVMRuntimeType llvmReturnType, LLVMRuntimeType[] llvmParamTypes, boolean varArgs, int functionId) {
        CompilerAsserts.neverPartOfCompilation();
        LLVMFunctionDescriptor func = new LLVMFunctionDescriptor(name, llvmReturnType, llvmParamTypes, varArgs, functionId);
        return func;
    }

    public static LLVMFunctionDescriptor create(int index) {
        return new LLVMFunctionDescriptor(null, LLVMRuntimeType.ILLEGAL, new LLVMRuntimeType[0], false, index);
    }

    @Override
    public String getName() {
        return functionName;
    }

    @Override
    public LLVMRuntimeType getReturnType() {
        return returnType;
    }

    @Override
    public LLVMRuntimeType[] getParameterTypes() {
        return parameterTypes;
    }

    @Override
    public boolean isVarArgs() {
        return hasVarArgs;
    }

    /**
     * Gets an unique index for a function descriptor.
     *
     * @return the function's index
     */
    @Override
    public int getFunctionIndex() {
        return functionId;
    }

    public boolean isNullFunction() {
        return functionId == 0;
    }

    @Override
    public String toString() {
        return getName() + " " + getFunctionIndex();
    }

    @Override
    public int compareTo(LLVMFunctionDescriptor o) {
        return Integer.compare(functionId, o.getFunctionIndex());
    }

    @Override
    public int hashCode() {
        return functionId;
    }

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof LLVMFunctionDescriptor)) {
            return false;
        } else {
            LLVMFunctionDescriptor other = (LLVMFunctionDescriptor) obj;
            return getFunctionIndex() == other.getFunctionIndex();
        }
    }

    public static boolean isInstance(TruffleObject object) {
        return object instanceof LLVMFunctionDescriptor;
    }

    @CompilationFinal private static ForeignAccess ACCESS;

    @Override
    public ForeignAccess getForeignAccess() {
        if (ACCESS == null) {
            try {
                Class<?> accessor = Class.forName("com.oracle.truffle.llvm.nodes.impl.intrinsics.interop.LLVMFunctionMessageResolutionAccessor");
                ACCESS = (ForeignAccess) accessor.getField("ACCESS").get(null);
            } catch (Exception e) {
                throw new AssertionError(e);
            }
        }
        return ACCESS;
    }

}

@@ -1620,55 +1620,8 @@
 s;%0A%0A
-import com.oracle.truffle.api.CompilerAsserts;%0A
 impo
@@ -3248,58 +3248,8 @@
 ) %7B%0A
-        CompilerAsserts.neverPartOfCompilation();%0A
     

Allow LLVMFunctionDescriptor to be instantiated from compiled code