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package org.graalvm.compiler.phases.common;

import static org.graalvm.compiler.core.common.GraalOptions.GenLoopSafepoints;

import org.graalvm.compiler.debug.DebugCloseable;
import org.graalvm.compiler.nodes.LoopBeginNode;
import org.graalvm.compiler.nodes.LoopEndNode;
import org.graalvm.compiler.nodes.SafepointNode;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.phases.Phase;

Adds safepoints to loops.
/** * Adds safepoints to loops. */
public class LoopSafepointInsertionPhase extends Phase { @Override public boolean checkContract() { // the size / cost after is highly dynamic and dependent on the graph, thus we do not verify // costs for this phase return false; } @Override @SuppressWarnings("try") protected void run(StructuredGraph graph) { if (GenLoopSafepoints.getValue(graph.getOptions())) { for (LoopBeginNode loopBeginNode : graph.getNodes(LoopBeginNode.TYPE)) { for (LoopEndNode loopEndNode : loopBeginNode.loopEnds()) { if (loopEndNode.canSafepoint()) { try (DebugCloseable s = loopEndNode.withNodeSourcePosition()) { SafepointNode safepointNode = graph.add(new SafepointNode()); graph.addBeforeFixed(loopEndNode, safepointNode); } } } } } } }