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package com.oracle.truffle.llvm.runtime.nodes.func;

import java.util.List;

import com.oracle.truffle.api.frame.FrameDescriptor;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.llvm.runtime.LLVMLanguage;
import com.oracle.truffle.llvm.runtime.memory.LLVMStack.LLVMStackAccess;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMStatementNode;
import com.oracle.truffle.llvm.runtime.nodes.asm.base.LLVMInlineAssemblyBlockNode;
import com.oracle.truffle.llvm.runtime.nodes.asm.base.LLVMInlineAssemblyBlockNodeGen;

public class LLVMInlineAssemblyRootNode extends LLVMRootNode {

    @Child private LLVMInlineAssemblyBlockNode prologue;
    @Child private LLVMInlineAssemblyBlockNode block;

    @Child private LLVMExpressionNode result;

    public LLVMInlineAssemblyRootNode(LLVMLanguage language, FrameDescriptor frameDescriptor, LLVMStackAccess stackAccess, List<LLVMStatementNode> statements, List<LLVMStatementNode> writeNodes,
                    LLVMExpressionNode result) {
        super(language, frameDescriptor, stackAccess);
        this.prologue = LLVMInlineAssemblyBlockNodeGen.create(writeNodes);
        this.block = LLVMInlineAssemblyBlockNodeGen.create(statements);
        this.result = result;
    }

    @Override
    public boolean isInternal() {
        // this is an artificial root node for an inline assembly block
        // we don't want this to show up in stack traces
        return true;
    }

    @Override
    protected boolean isInstrumentable() {
        // Sulong does not keep source locations for inline assembly nodes
        return false;
    }

    @Override
    public Object execute(VirtualFrame frame) {
        stackAccess.executeEnter(frame);
        try {
            prologue.execute(frame);
            block.execute(frame);
            return result == null ? 0 : result.executeGeneric(frame);
        } finally {
            stackAccess.executeExit(frame);
        }
    }
}