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 * permitted provided that the following conditions are met:
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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
 * with the distribution.
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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
 * 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
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package com.oracle.truffle.llvm.nodes.memory;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeField;
import com.oracle.truffle.api.dsl.NodeFields;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.memory.LLVMThreadingStack;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.types.Type;

@NodeFields({@NodeField(type = int.class, name = "size"), @NodeField(type = int.class, name = "alignment"), @NodeField(type = Type.class, name = "symbolType")})
public abstract class LLVMAllocInstruction extends LLVMExpressionNode {

    @CompilationFinal protected LLVMThreadingStack threadingStack;

    abstract int getSize();

    abstract int getAlignment();

    abstract Type getSymbolType();

    public LLVMThreadingStack getThreadingStack() {
        if (threadingStack == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            threadingStack = getContext().getThreadingStack();
        }
        return threadingStack;
    }

    public abstract static class LLVMAllocaConstInstruction extends LLVMAllocInstruction {
        @CompilationFinal(dimensions = 1) private Type[] types = null;
        @CompilationFinal(dimensions = 1) private int[] offsets = null;

        public void setTypes(Type[] types) {
            this.types = types;
        }

        public void setOffsets(int[] offsets) {
            this.offsets = offsets;
        }

        public Type getType(int i) {
            return types[i];
        }

        public int[] getOffsets() {
            return offsets;
        }

        public int getLength() {
            return offsets.length;
        }

        @Specialization
        public LLVMAddress execute() {
            return LLVMAddress.fromLong(getThreadingStack().getStack().allocateStackMemory(getSize(), getAlignment()));
        }

    }

    @NodeChild(type = LLVMExpressionNode.class)
    public abstract static class LLVMAllocaInstruction extends LLVMAllocInstruction {
        @Specialization
        public LLVMAddress execute(int nr) {
            return LLVMAddress.fromLong(getThreadingStack().getStack().allocateStackMemory(getSize() * nr, getAlignment()));
        }

        @Specialization
        public LLVMAddress execute(long nr) {
            return LLVMAddress.fromLong(getThreadingStack().getStack().allocateStackMemory((int) (getSize() * nr), getAlignment()));
        }
    }

}