private StructuredGraph parseAndProcess(String snippet) {
StructuredGraph graph = parse(snippet);
LocalNode local = graph.getNodes(LocalNode.class).first();
ConstantNode constant = ConstantNode.forInt(0, graph);
for (Node n : local.usages().filter(isNotA(FrameState.class)).snapshot()) {
n.replaceFirstInput(local, constant);
}
Map<Invoke, Double> hints = new HashMap<>();
for (Invoke invoke : graph.getInvokes()) {
hints.put(invoke, 1000d);
}
Assumptions assumptions = new Assumptions(false);
new InliningPhase(
runtime(),
hints,
replacements,
assumptions,
null,
getDefaultPhasePlan(),
OptimisticOptimizations.ALL)
.apply(graph);
new CanonicalizerPhase.Instance(runtime(), assumptions, true).apply(graph);
new DeadCodeEliminationPhase().apply(graph);
return graph;
}
public static void propagateKill(Node node) {
if (node != null && node.isAlive()) {
List<Node> usagesSnapshot = node.usages().filter(isFloatingNode()).snapshot();
// null out remaining usages
node.replaceAtUsages(null);
node.replaceAtPredecessor(null);
killWithUnusedFloatingInputs(node);
for (Node usage : usagesSnapshot) {
if (!usage.isDeleted()) {
if (usage instanceof PhiNode) {
usage.replaceFirstInput(node, null);
} else {
propagateKill(usage);
}
}
}
}
}
