27 
  28 import org.graalvm.compiler.api.directives.GraalDirectives;
  29 import org.graalvm.compiler.nodes.GuardNode;
  30 import org.graalvm.compiler.nodes.StructuredGraph;
  31 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
  32 import org.graalvm.compiler.nodes.spi.LoweringTool;
  33 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  34 import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase;
  35 import org.graalvm.compiler.phases.common.LoweringPhase;
  36 import org.graalvm.compiler.phases.tiers.PhaseContext;
  37 
  38 /**
  39  * This test checks the combined action of
  40  * {@link org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase} and
  41  * {@link org.graalvm.compiler.phases.common.LoweringPhase}. The lowering phase needs to introduce
  42  * the null checks at the correct places for the dominator conditional elimination phase to pick
  43  * them up.
  44  */
  45 public class ConditionalEliminationTest10 extends ConditionalEliminationTestBase {
  46 



  47     private static class TestClass {
  48         int x;
  49     }
  50 
  51     @SuppressWarnings("all")
  52     public static int testSnippet(int a, TestClass t) {
  53         int result = 0;
  54         if (a == 0) {
  55             GraalDirectives.controlFlowAnchor();
  56             result = t.x;
  57         }
  58         GraalDirectives.controlFlowAnchor();
  59         return result + t.x;
  60     }
  61 
  62     @Test
  63     public void test1() {
  64         StructuredGraph graph = parseEager("testSnippet", AllowAssumptions.YES);




























  65         PhaseContext context = new PhaseContext(getProviders());
  66         new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
  67         Assert.assertEquals(2, graph.getNodes().filter(GuardNode.class).count());
  68         new DominatorConditionalEliminationPhase(true).apply(graph, context);
  69         Assert.assertEquals(1, graph.getNodes().filter(GuardNode.class).count());
  70     }
  71 }

  27 
  28 import org.graalvm.compiler.api.directives.GraalDirectives;
  29 import org.graalvm.compiler.nodes.GuardNode;
  30 import org.graalvm.compiler.nodes.StructuredGraph;
  31 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
  32 import org.graalvm.compiler.nodes.spi.LoweringTool;
  33 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  34 import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase;
  35 import org.graalvm.compiler.phases.common.LoweringPhase;
  36 import org.graalvm.compiler.phases.tiers.PhaseContext;
  37 
  38 /**
  39  * This test checks the combined action of
  40  * {@link org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase} and
  41  * {@link org.graalvm.compiler.phases.common.LoweringPhase}. The lowering phase needs to introduce
  42  * the null checks at the correct places for the dominator conditional elimination phase to pick
  43  * them up.
  44  */
  45 public class ConditionalEliminationTest10 extends ConditionalEliminationTestBase {
  46 
  47     private static boolean condition1;
  48     private static boolean condition2;
  49 
  50     private static class TestClass {
  51         int x;
  52     }
  53 
  54     @SuppressWarnings("all")
  55     public static int testSnippet1(TestClass t) {
  56         int result = 0;
  57         if (condition1) {
  58             GraalDirectives.controlFlowAnchor();
  59             result = t.x;
  60         }
  61         GraalDirectives.controlFlowAnchor();
  62         return result + t.x;
  63     }
  64 
  65     @Test
  66     public void test1() {
  67         test("testSnippet1", 1);
  68     }
  69 
  70     @SuppressWarnings("all")
  71     public static int testSnippet2(TestClass t) {
  72         int result = 0;
  73         if (condition1) {
  74             GraalDirectives.controlFlowAnchor();
  75             result = t.x;
  76         } else {
  77             GraalDirectives.controlFlowAnchor();
  78             result = t.x;
  79         }
  80 
  81         if (condition2) {
  82             result = t.x;
  83             GraalDirectives.controlFlowAnchor();
  84         }
  85 
  86         return result;
  87     }
  88 
  89     @Test
  90     public void test2() {
  91         test("testSnippet2", 1);
  92     }
  93 
  94     private void test(String snippet, int guardCount) {
  95         StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
  96         PhaseContext context = new PhaseContext(getProviders());
  97         new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
  98         DominatorConditionalEliminationPhase.create(true).apply(graph, context);
  99         Assert.assertEquals(guardCount, graph.getNodes().filter(GuardNode.class).count());

 100     }
 101 }