[GR-32791] Avoid Arrays.copyOf in SchedulePhaseBenchmark.

PullRequest: graal/9485
The-Alchemist · Aug 7, 2021 · 7e6c2bb · 7e6c2bb
2 parents 058e893 + cd3aa6e
commit 7e6c2bb
Showing 1 changed file with 9 additions and 6 deletions.
diff --git a/...icrobenchmarks/src/org/graalvm/compiler/microbenchmarks/graal/SchedulePhaseBenchmark.java b/...icrobenchmarks/src/org/graalvm/compiler/microbenchmarks/graal/SchedulePhaseBenchmark.java
@@ -24,15 +24,12 @@
  */
 package org.graalvm.compiler.microbenchmarks.graal;
 
-import java.util.Arrays;
-
-import org.graalvm.compiler.phases.schedule.SchedulePhase;
-import org.openjdk.jmh.annotations.Benchmark;
-
 import org.graalvm.compiler.microbenchmarks.graal.util.MethodSpec;
 import org.graalvm.compiler.microbenchmarks.graal.util.ScheduleState;
 import org.graalvm.compiler.nodes.cfg.ControlFlowGraph;
+import org.graalvm.compiler.phases.schedule.SchedulePhase;
 import org.graalvm.compiler.phases.schedule.SchedulePhase.SchedulingStrategy;
+import org.openjdk.jmh.annotations.Benchmark;
 
 public class SchedulePhaseBenchmark extends GraalBenchmark {
 
@@ -77,11 +74,17 @@ public static int[] intersectionSnippet(int[] in1, int[] in2) {
             }
         }
         if (next < result.length) {
-            result = Arrays.copyOf(result, next);
+            result = copyOf(result, next);
         }
         return result;
     }
 
+    private static int[] copyOf(int[] original, int newLength) {
+        int[] copy = new int[newLength];
+        System.arraycopy(original, 0, copy, 0, Math.min(original.length, newLength));
+        return copy;
+    }
+
     // Checkstyle: stop method name check
     @MethodSpec(declaringClass = SchedulePhaseBenchmark.class, name = "intersectionSnippet")
     public static class IntersectionState_LATEST_OPTIMAL extends ScheduleState {