Examples with MultiGuardNode org.graalvm.compiler.nodes.extended.MultiGuardNode used on opensource projects

Example 1 with MultiGuardNode

use of org.graalvm.compiler.nodes.extended.MultiGuardNode in project graal by oracle.

the class GraphUtil method markUsagesForKill.

private static void markUsagesForKill(EconomicSet<Node> markedNodes) {
    NodeStack workStack = new NodeStack(markedNodes.size() + 4);
    for (Node marked : markedNodes) {
        workStack.push(marked);
    }
    ArrayList<MultiGuardNode> unmarkedMultiGuards = new ArrayList<>();
    while (!workStack.isEmpty()) {
        Node marked = workStack.pop();
        for (Node usage : marked.usages()) {
            boolean doMark = true;
            if (usage instanceof MultiGuardNode) {
                // Only mark a MultiGuardNode for deletion if all of its guards are marked for
                // deletion. Otherwise, we would kill nodes outside the path to be killed.
                MultiGuardNode multiGuard = (MultiGuardNode) usage;
                for (Node guard : multiGuard.inputs()) {
                    if (!markedNodes.contains(guard)) {
                        doMark = false;
                        unmarkedMultiGuards.add(multiGuard);
                    }
                }
            }
            if (doMark && !markedNodes.contains(usage)) {
                workStack.push(usage);
                markedNodes.add(usage);
            }
        }
        // Detach unmarked multi guards from the marked node
        for (MultiGuardNode multiGuard : unmarkedMultiGuards) {
            multiGuard.replaceFirstInput(marked, null);
        }
        unmarkedMultiGuards.clear();
    }
}