package org.graalvm.compiler.core.test;
import org.graalvm.compiler.debug.DebugContext;
import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
import org.graalvm.compiler.nodes.calc.IntegerLessThanNode;
import org.graalvm.compiler.nodes.spi.LoweringTool;
import org.graalvm.compiler.phases.common.CanonicalizerPhase;
import org.graalvm.compiler.phases.common.IterativeConditionalEliminationPhase;
import org.graalvm.compiler.phases.common.LoweringPhase;
import org.graalvm.compiler.phases.tiers.PhaseContext;
import org.graalvm.compiler.virtual.phases.ea.EarlyReadEliminationPhase;
import org.junit.Assert;
import org.junit.Test;
public class ConditionalEliminationTest15 extends ConditionalEliminationTestBase {
private void checkNodeCount(String methodName, Class<? extends Node> nodeClass, int count) {
StructuredGraph graph = parseEager(methodName, AllowAssumptions.YES);
CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
PhaseContext context = new PhaseContext(getProviders());
new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
canonicalizer.apply(graph, context);
new EarlyReadEliminationPhase(canonicalizer).apply(graph, context);
new IterativeConditionalEliminationPhase(canonicalizer, true).apply(graph, context);
getDebugContext().dump(DebugContext.BASIC_LEVEL, graph, "After ConditionalEliminationPhase");
Assert.assertEquals(count, graph.getNodes().filter(nodeClass).count());
}
public static int testRedundantIntegerLessThanNode(int index, int[] arr) {
while (arr[index] != 42) {
if (index >= 0) {
return 1;
}
}
return 2;
}
public static int testRedundantIntegerLessThanNode2(int index, int[] arr) {
while (arr[index] != 42) {
if (index < arr.length) {
return 1;
}
}
return 2;
}
@Test
public void testRedundantSignedLessThanNode() {
checkNodeCount("testRedundantIntegerLessThanNode", IntegerLessThanNode.class, 0);
checkNodeCount("testRedundantIntegerLessThanNode2", IntegerLessThanNode.class, 0);
}
}